Frequently Asked Questions

Welcome. We regularly receive technical enquiries - plus customer questions about how to clean and maintain Franke products - so this section contains answers to our most frequent queries. If you cannot find the answer to your question, simply contact our Consumer Care team. We look forward to helping you.

Are all sinks available in left hand and right hand drainer format?

All Franke sinks are available as right-hand or left-hand drainer - where a sink is only available in one format this is always specified on the Specification Sheet and in our brochure. Reversible sinks automatically offer that choice.

Are plumbing kits included?

Generally you will need to purchase a Siphon I, II or III part plumbing kit (depending on the number of sink bowls) when ordering your sink with your retailer. For more information on Franke Siphon Plumbing Kits click here

Can I fit a Waste Disposal Unit in my Franke sink?

Yes. Any sink that has a 3 1/2“ waste (90mm) is capable of having a waste disposal unit connected. For Franke ceramic sinks an Extended Flange is available for Continuous Feed models. If your sink has an overflow you may need to purchase a WDU Overflow Converter, available from our service agents.

How do I clean the overflow?

Many Franke sinks come with a Hygienic Overflow, which offers versatility for cleaning. Simple removal of the logo plate reveals the overflow aperture for easy, hygienic cleaning. Most Franke sinks have rigid overflow pipes and can be cleaned by pouring boiling water into them. Alternatively use a proprietary cleaner.

How do I apply earthing to a Franke sink?

Despite any regulatory enforcement, in common with many sink manufacturers Franke make provision for a mechanical bond to be made to inset sink models. This is often done by utilising one of the cut-out points for the clips along the length of the clip rail. In the case of sliding clips Franke make a hole at the end of the clip rail length where the bond can be accommodated.

How do I fit undermounted sinks?

This depends on the worktop but we would recommend that you seek professional advice. A template and fixing clips are provided in the box. Some circumstances may allow for fitting a bowl directly to the worktop. Alternatively a plywood template can be made to the size of the sink, which will effectively 'sandwich' the sink flange, when addressed to the underside of the material. We would recommend the use of a sealant between the flange of the sink and the worktop to avoid any water ingress. In all cases you are advised to consult your supplier.

What is the warranty on Franke sinks?

Franke sinks come with a 50 year against manufacturing defect. 
For more information on Franke Guarantees click here

Should I use a plastic washing up bowl with my Franke sink?

We would always recommend that you avoid the use of a plastic washing up bowl as this will over time cause the development of regular abrasion marks over the sink's surface.   

Where can I see a colour sample of a sink?

Normally at your local retailer, however if you have difficulty, swatches exist for colour matching. For this service contact our Consumer Care team at Franke UK, click here.

Why have I only received 1 Waste with my 1 1/2 bowl inset sink?

Generally, Basket Strainer Wastes are put with a sink by a distributor when an order is received from a retailer. You should contact your retailer and they will be able to contact their distributor accordingly.

Can I stop my stainless steel sink scratching?

No. Stainless Steel will always scratch (whether it be of Franke's manufacture or competitor) and because of the directional polishing marks on many Franke models the scratching will show up quite dramatically initially. However, with use and cleaning (using a proprietary cleaner like Shiny Sinks) the stainless steel will eventually build up a patina over the years and the scratching marks will not be as evident. For more information on cleaning Stainless Steel sinks please click here

What's the best product to use to maintain my stainless steel sink?

Franke Inox Cream is recommended for regular maintenance of stainless steel sinks. Scratches can be blended in using a Scotch Brite pad and Inox cream. Consumers should always wipe with the grain, rinse thoroughly and dry when finished. The Inox cream forms a waterproof layer on the sink, which helps the water drain off easier. To purchase Franke Inox Creme click here.

How can I remove 'rust spots' from my new stainless steel sink?

As the world's largest stainless steel manufacturers, Franke are extremely stringent in the quality and standards required from the steel suppliers. The material used is a high quality chrome nickel steel which is metallurgically incapable of rusting or corroding in normal household conditions. It can, however, harbour ferrous particles from the water supply and these often occur with new installations when the pipework is disturbed. These filings get deposited and cling to the sink surface and unless removed will rust.

In this instance we would recommend that the sink is cleaned thoroughly using a product called ‘Cif’. This should be applied to the sink with a soft cloth and worked in a circular motion. We would point out that unless the particles are completely removed they will return. It is therefore very important that after cleaning the sink, it is dried thoroughly. This process needs to continue at least daily, and for several days after the problem has disappeared to ensure all particles have been removed. The problem is sometimes particularly obstinate to remove and it may take several attempts to restore the sink to its pristine condition. For information, ‘Cif’ is widely available in supermarkets.

We would point out that unless the particles are completely removed they will return. It is therefore very important that after cleaning the sink, it is dried thoroughly. This process needs to continue until the problem disappears. The problem is sometimes particularly obstinate to remove and it may take several attempts to restore the sink to its pristine condition.

How do I best clean my Stainless Steel sink?

Discoloration and most marks on stainless steel are caused by water-borne deposits clinging to its surface. One of the best ways to keep your stainless steel sink in pristine condition is to clean it with a proprietary product such as Shiny Sinks which can be used daily. Shiny Sinks is available from large supermarkets and hardware stores, and is also available to buy online from the manufacturer at For more information on cleaning Stainless Steel sinks click here

How do I find out what cut-out dimensions are necessary for my Franke stainless steel sink?

As a general guide, cut inside the overall frame dimension (by inverting the sink on the worktop) by 8mm all round and always use a 20mm (important!) radius at the corners. Cut out sizes are shown on the specification sheet for each sink. If a template is provided, please use that.

Do I need to use special sealant when installing Glass sinks?

Due to the nature of the backing to the glass of Glass Inset Sinks, it is important that an acid free sealant is used when installing the sink in the worktop. This prevents any reaction between the sealant and the backing to the glass. The acid free sealant we recommend – which we believe is available from Screwfix – is made by Dow Corning® and is called DOW Corning® 799 Glazing. Please refer to the installation instructions enclosed with the sink for more information.

How do you determine the capacity of the sink?

The 3 basic measurements for comparing sink sizes are:

  • Depth – distance from the top of the rim to the bottom of the sink next to the waste
  • Taper – inward slope of each side of the sink from rim to bottom
  • Radius – measure of the bowl’s corners & bottoms where the sides and bottom meet

The deeper the bowl, the straighter the slope and the tighter (smaller) the radius, the more capacity there is in the sink.

How do I best clean my Fragranite Sink?

Your Franke Fragranite sink is manufactured to the highest possible standards. To maintain its good looks, Franke suggests you follow these guidelines.

Most deposits can be removed with washing up liquid and hot water followed by a clean water rinse. It is also good practice to then dry the sink with a soft cloth as otherwise limescale can build up on the surface.

For more stubborn marks, we recommend use of the product CIF Cream Cleaner. This should be used in conjunction with a Scotchbrite® pad, in vigorous circular motions to clean your sink. CIF is available from most large supermarkets.

The quality of your water can affect the good looks of your sink by giving the appearance of staining. This “staining” is generally a build up of limescale or similar mineral deposit, particularly prevalent in hard water areas. Limescale readily absorbs staining agents such as tea, coffee, red wine, etc., spoiling the appearance of your sink. For this reason always rinse and dry your sink after each occasion you use it to avoid mineral deposits being left behind on the surface when the water evaporates.

To remove any limescale that has built up on your sink, try using a proprietary limescale removing product such as Viakal® or Limelite®. Alternatively, soak in a solution of one part vinegar to three parts water. This will loosen the scale, making it possible to scrub it away with an abrasive pad and kitchen sink cleaner.

For more information on cleaning Fragranite please click here.

How do I knock out a taphole in a Fragranite inset sink?

1. Ensure colour sticker is in centre of pre-formed taphole
2. Follow the description line drawings shown on the template, or:

3.1 Take sink out of box and rest the sink vertically against your legs with the face of the sink facing outwards and ensuring the taphole is for the correct hand drainer (take care not to damage the edge of the sink in the process);
3.2 Take a centre punch and place on the centre of the colour sticker;
3.3 Strike the punch hard with a hammer - this will result in the core of the tap hole being knocked out;
3.4 Finish off using the ball of the hammer and using a round file.

How do I best clean my Ceramic Sink?

For day-to-day care, all you need is water and a damp cloth. A fast and easy way to remove water marks, grease or soap scum deposits, is with a proprietary bathroom cleaner such as Ajax or Flash liquid spray, or similar products found in your supermarket.

Marks caused by iron or aluminium saucepans on the ceramic surface that normal cleaning will not remove can be removed by a product called 'Astonish' which can be purchased in most supermarkets, John Lewis, Lakeland etc, or by mail order from the manufacturer on Tel: 0113 236 0036 or online at For more information on Ceramic Sinks please click here.

How do I knock out a taphole in a Ceramic inset sink?

Only drill Tap hole FROM TOP FACE

1. Decide on the pre- punched tap holes you require.
2. Measure to find the centre of the pre- punched tap hole required and cover the area with masking tape.
3. Using a centre punch, crack the glaze in the centre of the required hole.
4. Using a No. 8 masonry drill, carefully drill a small pilot hole from the top. NB. Only drill one small hole
5. You can then proceed to enlarge the hole to the required size by carefully using your hammer with the centrepunch.

How do I best clean my Tectonite Sink?

Due to its unique coating, Tectonite sinks are resistant to all common liquids etc that are used in the kitchen (tomato sauce, vinegar, red wine etc.). The sink can be cleaned using any brand of cream cleaner eg Cif, and a sponge or cloth. For more information click here.

What is Tectonite?
  • Tectonite is a combination of three elements:
  • SMC (Sheet Moulding Compound) a glass fibre, polyester based, carrier material;
  • Chemically fused 3rd Generation PiMC (Powder In Mould Coating) which gives the sink its colour, heat-, scratch- and wear and tear resistance;
  • Unique texture which gives the sink its granite look.
  • The sink is made by hot compression moulding with hydraulic presses.
How heat resistant is Tectonite?

Tectonite can withstand temperatures of up to 300°C. Despite the fact that Tectonite is very heat resistant we always advise to use a coaster when putting a hot pan on the sink.

Can all taps be used in conjunction with a combi boiler?

Not necessarily. You are advised to check with the manufacturer.

Can I still get spare parts for discontinued taps?

Contact our service agents - click here for more information.

How can I prevent my tap 'flexing' on my stainless steel sink?

Occasionally a heavy tap can 'flex' on some large stainless steel sinks. This can be rectified by your tap being braced, and it is not unusual for people to have this kind of problem with a stainless steel sink, and is not a problem emanating from the sink or tap being defective in any way.

To brace the tap, you either need a piece of wood or chipboard which can be screwed across the underside of the worktop cutout and the existing tap can be fixed through a hole in this, or you can utilise a tap brace. In this way the tap is effectively secured to the underside of the strut and not to the underside of the sink, and this reduces any tendency for the sink to flex when the tap is turned on or off.

Franke also produce a patented Tap Brace which will provide a solution to the problem of 'flexing' of heavy taps on some stainless steel sink models. Fitting directly to the worktop, the tap brace has a variable collar which fits all models of taps.

How do I best clean taps?

Refer to the installation instructions enclosed with your tap. You can download a PDF of the instructions here. Use only a soft cloth and mild detergent. For more information on cleaning your tap click here

How do I remove a spout on a Franke tap?

Tap spouts are most commonly removed by:

1.Undo the grub screw at the back of the tap
2.Unscrew the collar at the joint with the body
3.Located lug in bayonet

Is water pressure critical when I choose a particular Franke tap?

Flow rate can be affected particularly on the hot side of traditional vented plumbing systems. We do not recommend ceramic disc taps where there is less than 4 metre head of water. For combi boiler installations check with the manufacturer. For more information on flow rates click here.

I've heard that ceramic disc mechanisms never go wrong. Is this true?

Operationally ceramic discs can last for the life of the tap. However, mechanisms can be affected by water borne particles or hard water. To obtain replacement valve mechanisms contact our service agents.

Check the specification sheet for your particular tap. Generally they are 15mm.

What is the warranty on Franke taps?

Normally this is 5 years on the valve mechanisms and 1 year on the finish of the tap. Click here for detailed information on tap guarantees. Guarantees valid only on products placed and used in normal domestic situations.

Where can I see a sink/tap similar to the one I am considering?

Simply click the WHERE TO BUY link shown on each page of our website. Before visiting however, please contact the retailer to check availability of the product.

What does 'SilkSteel PVD' finish mean?

PVD means Physical Vapour Deposition. This is an industrial process that provides a very resilient and robust finish to the tap, giving it a coating-like appearance.

Will my SilkSteel tap match my silk finish stainless steel sink?

Franke taps are designed to complement Franke sinks, and not necessarily match exactly. SilkSteel taps will complement brushed finish appliances such as an oven and hob in your kitchen. Franke stainless steel taps such as the Eos, Panto and Valais will be a very close match to a stainless steel sink.

I have moved house – why does the water taste and smell different?

The makeup of water (including the levels of chlorine) varies from area to area and this will mean that the water may taste or smell slightly different from the water that you were used too. Another reason may be due to our having to alter the treatment process slightly depending on the weather, demand and time of year. These factors all affect the levels of chlorine that we must add to the water which in turn will slightly affect the taste and smell.

Why does my water taste salty?

Incorrectly installed water softeners, fitted to washing machines for example, can cause salty tastes and contaminate the drinking water supply. Do not drink water from water softeners because it contains high levels of salt – you should always use a tap with unsoftened water for cooking and drinking.

Why does my water have a TCP / Metallic taste?

There are several possible causes of unusual tastes or odours in water:

TCP tastes can occur when the internal stop tap has been operated to carry out any work, or if the tap is operated after many years of not being used. Washers can start can start to degrade over time and cause TCP taste and odour problems. However this applies more to properties where the internal stop tap is more than a few years old and is seldom or never used.

Since TCP like compounds are formed when the chlorine reacts with plastic or rubber, this sometimes means that the TCP taste is more noticeable when the Chlorine level is highest. Although Chlorine is added to water continually a demand for water can mean that it may sometimes have a higher level of chlorine in it, for example, in the morning or when you get home from work.

For more information please download the PDF.

What size taphole cut out do I need for my Franke tap?

Most Franke taps require the industry standard taphole cut out size of 35mm diameter. There are several exceptions to this as follows:

  • Bridge & Bridge Lever - tap requires 2 x 25mm diameter tapholes
  • Olympus Side Spray - tap requires 1 x 35mm taphole, side spray requires 1 x 30mm taphole
  • Augusta 3 Hole Tap - require 3 x 28-32mm diameter holes for spout + 2 handles
  • Franke FilterFlow Mini - requires 1 x 20mm diameter taphole
  • Franke FilterFlow Hand Spray - tap requires 1 x 35mm taphole, hand spray requires 1 x 30mm taphole
  • Soap Dispenser - requires 1 x 25mm diameter hole
Where can I obtain additional or replacement accessories?

You can easily obtain additional or replacement accessories for your Franke sink, simply click here

Why should I use Franke Accessories?

Franke accessories can help keep your kitchen and prep area clean and organised, adding to the enjoyment of the food preparation. Greater efficiency in your efforts is the result of the customisation of the chopping boards, strainer bowls etc to each unique sinks design. For more information on Franke accessories click here

How do I care for my Glass Chopping Board?

Please note the following points:

Place the foodstuff to process in the middle of the chopping board, not on the side. The chopping board might tip if pressure is applied to one side only.

Do not use knives made of ceramic material as this may cause damage to the surface.

The chopping board consists of tempered safety glass and is more shock and heat resistant than ordinary glass products.

Do not expose the chopping board to temperatures below 0°C or over 80°C. Do not use the product on hot plates or in ovens, microwaves, freezers or dishwashers.

Cleaning and care:

Normal staining can be removed with soap and water. Tenacious staining of the worktop should be removed with a glass rubber and then treated with a mild detergent.

Do not use cleaning products for glass ceramic hobs as these products should not come into direct contact with foodstuff.

Do not use abrasives (liquids or sponges) or aggressive detergents such as cleaning spray for ovens, bleach or other chemicals.

Franke is not liable for damage caused by improper or unsuitable use and non-compliance to the above cleaning instructions.

How do I care for my Hygenia Food Preparation Platter?

The Hygenia Chopping Board is made of Polyethylene, is extremely durable, and is capable of being washed in the dishwasher. It is heat resistant up to a maximum of 100°C, however under certain circumstances very hot utensils may brown the surface. As an oil based product it is not scratch resistant, and the surface will abrade over time.

How do I care for my Wooden Food Preparation Platter?

Wood is a natural product it is therefore subject to absorbing moisture, and if the quantities of moisture are not equal on both sides it can bow especially so when the product is first used.

However, this can be corrected by wetting the board on both sides and leaving it to dry overnight on a flat surface with the convex side uppermost. This is most conveniently done with the board placed over the bowl.This enables the warp to drop out and as the board gets more use it will eventually stop warping. We also recommend occasional oiling of the board with a good quality vegetable oil, to make the surface more water-resistant. Do not put the board near a heat source and do not put it in direct sunlight to dry.

How do I care for my plastic coated Drainer Basket?

The life of the basket very much depends on the type of use it receives, and we notice that some customers choose to use the basket in the sink for washing-up purposes (for which it was not designed). If the basket is used in this way its life is considerably shortened due to the constant immersion in hot water. This softens the plastic coating which then becomes susceptible to piercing by sharp objects such as knives, forks etc. When water penetrates onto the metal frame it rusts and subsequently the plastic coating cracks and breaks away and if used in this manner it does mean that the life of the basket is considerably shortened.

How do I solve clogging Issues with my soap dispenser?

You may wish to add water to thicker concentrated liquid soaps, in a 1/3 water to 2/3 ratio to reduce the possibility of clogging. Regular cleaning of the soap dispenser is also recommended.

Instant Boiling Water Taps
Is the water from a Minerva or Omni really 100°C?

Yes. For Minerva, the water is stored under pressure at 110°C in the heating tank and is boiling (100°C) when it leaves the spout.

Omni’s boiler stores water at 105°C – ensuring that the water is truly boiling – at 100°C when it leaves the tap’s spout. Many of the hot water taps available – often described as ‘kettle hot’ or ‘near boiling’, do not dispense boiling water at 100°C – so it is worth double-checking a hot water tap’s technical specification prior to purchase.

Can I replace my existing tap with a Minerva or Omni tap?

Yes. As the Minerva and Omni taps fit in a standard 35mm tap hole, they can be retro-fitted to replace an existing tap.

Do I need to pay to have a separate taphole cut in my granite worktop to install the Minerva or Omni tap?

No. The Minerva and Omni taps can be installed in a standard 35mm diameter tap hole.

Will I still need to use my kettle?

No, using a kettle will be a thing of the past and you will wonder how you ever managed without an Omni or Minerva Instant Boiling Water Tap!

Can I position the boiling water lever to suit left or right handed operation?

The Minerva Original, Minerva Irena and the Omni tap models can be installed with the boiling water handle either to the left or the right side. We recommend that you position the spout opposite to the boiling water control when operating, bearing in mind the position of your sink bowl(s) and whether you are left or right handed. There is a Franke logo positioned on either side of the tap body, and there is no grub screw.

The Minerva Helix and Minerva Mondial must be fitted with the boiling water handle on the left.


What safety functions do the Minerva and Omni taps have?

The Minerva 3-in-1 tap has a safety button fitted in the boiling water handle which needs to be activated to operate the boiling water function. When this button is released the handle closes automatically and shuts off the supply of boiling water. As you would expect when dealing with boiling water, sensible precautions need to be taken when operating the boiling water function.

The Omni 4-in-1 tap has 3 safety functions on the lever which operates the boiling water:

  1. A red lever locking clip:
    This prevents the boiling water lever from being used.
  2. A lever interlock:
    The lever is spring loaded. It must be pushed down and held in position before it can be operated.
  3. Spring loaded automatic shut-off:
    If you release the handle it will spring back automatically and shut off the boiling water.
What is the function of the filter cartridge supplied with the system?

The primary function of the Franke 07 filter, supplied as standard with the Minerva system, is to protect the heating tank from the build-up of limescale deposits and remove chlorine to improve the taste and odour of the boiling water.

The Franke 08 filter cartridge supplied with the Omni system has been specially formulated to do two jobs: provide high quality drinking water and protect the boiler. The Franke 08 filter cartridge will remove sediment, chlorine and a range of unwanted chemical contaminants and protects the boiler from the effects of limescale and corrosion.

Other filter cartridges are available for specialist applications. For more information visit

How often will the filter cartridge need replacing?

The Franke 07 filter cartridge supplied with the Minerva system should be replaced every 6 months to maintain your warranty. Routine replacement of the filter cartridge is particularly important in hard water areas to prevent limescale forming and potentially damaging the heating tank and the tap.

The Omni’s Franke 08 filter cartridge must be replaced every 6 months to maintain your system’s warranty and ensure consistent performance.

The Omni tap features a cartridge change indicator. It illuminates and flashes red to indicate it is time to replace the filter cartridge. The indicator system requires 2 x AA batteries.

The Franke 08 filter cartridge has been specially formulated to do two jobs: provide high quality drinking water and protect the boiler. The Franke 08 filter cartridge will remove sediment, chlorine and a range of unwanted chemical contaminants and protects the boiler from the effects of limescale and corrosion.

Other filter cartridges are available for specialist applications. For more information visit

Please note that only genuine Franke filter cartridges must be used. Failing to do so will void your Minerva or Omni warranty.

How much space do I need to install a Minerva or Omni system?

Due to the compact design of the Minerva system – 550mm x 211mm x 142mm high - it will fit comfortably inside a standard 600mm kitchen cabinet. Where space is at a premium the heating tank can be installed in the kick space behind the plinth of the cabinet, but bearing in mind that it will be necessary to provide convenient access to operate the tank reset button.

The Omni boiler and filter system will fit comfortably into a standard kitchen unit. The boiler measures just 352mm high x 182mm wide x 233 deep. The filter housing is similarly compact and is simply attached to the side of the kitchen cupboard. An additional 80mm clearance must be allowed above the top of the boiler for the various hose connections. Longer hoses are available at extra cost if required.

Please contact Franke FilterFlow on 01603 875 468 or email

What electrical supply is required to power the system?

The Minerva boiler and Omni boiler are both designed to be connected to a standard domestic 220/230 volt 13 amp supply, and come complete with a power lead for plugging into a standard 13 amp wall socket.

What are the minimum and maximum water pressures?

To operate correctly the Minerva heating tank requires both the hot and cold mains water pressure to be minimum 1.5bar (23psi), maximum 5bar (75psi). On no account should the water pressure exceed 5 bar (75psi) or the pressure relief valve will bypass and dispense cold water. We recommend that a professional plumber is employed to measure the water pressure at a low demand period. It is preferable for the hot and cold supply pressures to be equal.

For Omni, the hot and cold water pressure should be between 1.5 bar (23psi) 5 bar (75psi).

If the water pressure is above the maximum of 5 bar, a Pressure Reducing Valve should be installed in the water supply to the heating tank. A suitable Pressure Reducing Valve can be purchased from any plumbers merchant or online at

If you unsure about water pressure we recommend that you engage a qualified plumber.

Is the Omni system compatible with gravity-fed plumbing systems?

For a satisfactory performance the Omni requires a minimum water pressure of 1.5 bar (23psi). It will work on a gravity fed hot water system but you are unlikely to be happy with the flow. If your hot water pressure is too low we recommend that you install a suitable booster pump.

If I used all the boiling water, how long would the boiler take to recover?

The Minerva tap will dispense up to 47 cups of 100°C boiling water per hour with a recovery time of 15 minutes from empty.

The recovery time for Omni is 10 minutes after drawing off approximately 8 cups of boiling water.

Is a Minerva or Omni cheaper to operate than my normal kettle?

Boiling a kettle can be a waste of water and time; the Minerva 3-in-1 Tap is effectively insulated and unlike a kettle there is no waste of boiling water, meaning less energy used and savings in water and electricity.

  • Output per day (Watt): 15.6
  • Output per year (kWh): 136.7
  • Usage (kWh) (equiv. 1.551 per day): 59
  • Total Usage (kWh): 195.7
  • Total Cost (kWh = 0.215): € 42.07

Due to the high-tech nature of its construction the Omni 4-in-1 Tap is highly energy efficient and consumes very little power. Leave the Omni on standby for 24 hours and it will cost just 2.3 pence (based on tariff of 14p/kwh). Making the equivalent of 10 mugs (300ml a mug) of boiling water a day will cost as little as 10 pence in total.

My fitter has plugged in the Minerva tank and switched on the power supply before filling it with water and tripped the safety override; what can he do?

The Minerva tank is fitted with a safety device that will shut-off the boiling water if the tank is switched on without water, or there is a power surge. The hot water flow can be restored by operating a reset button, located behind a white plastic cover, on the front of the tank (opposite side to where the braided inlet and outlet hoses are connected).

Disconnect the Minerva tank’s electrical power supply. Operate the boiling water handle on the tap to check that the tank is full of water. Use a small screwdriver to remove the white cover to reveal the button in the recess. Press the button firmly with the flat end of a pencil until you hear a click to reset the tank. Replace the white cover.

Switch on the power supply and allow 20 minutes for the tank to reheat before use.

How do you operate the Omni filtered cold water and the filtered boiling water?

Operating the Omni's filtered boiling and filtered cold water couldn’t be easier. To dispense boiling water simply depress the lever, hold it down and rotate it against the spring pressure. To dispense cold filtered water it is not necessary to depress the lever, you simply rotate it in the opposite direction. The Omni’s patented design ensures that all the tap’s functions are mechanically activated and do not rely upon complicated and/or expensive electronic controls. 

Is the Omni easy to install - will I need to buy other bits and pieces?

When designing the Omni great attention was paid to making it easy to install. No specialist tools are required. Given that there is a convenient electrical plug socket, a competent professional will be able to install and commission an Omni system in 2 hours or less. 

The Omni is supplied complete with everything needed for installation, including a filter unit. The only possible additional part that would be required is a pressure reducing valve in the event that you water pressure is excessively high i.e. 5 bar (75psi) or above. A suitable pressure reducing valve can be purchased from any plumber’s merchants, or online

Is the Omni tap finish durable?

Yes. The surfaces of the Omni tap are manufactured from solid, premium grade, “High Shine” stainless steel and are therefore virtually indestructible. Most taps are made from brass with a plated surface finish which is generally less durable and difficult to maintain.

Does the Minerva or Omni tap get hot in operation?

The Minerva 3-in-1 Tap has an insulated spout and operating handle. 

For the Omni 4-in-1 Tap, apart from the tip of the spout the surfaces of the Omni are safe to touch as they are not in direct contact with boiling water. 

Can I install an Omni if I have a water softener installed?

Yes, however the softened water must only be used for the hot and cold supply, not to supply the filtered cold and filtered boiling water. 

Does the cupboard you are putting the Omni boiler in need to be ventilated?

Not usually. It would only be necessary should the cupboard be tightly sealed. Improving the ventilation is simply a matter of drilling a few holes in the back or base panel of the cupboard. NB The boiler must be installed upright, ie it cannot be fitted on its side.

My Minerva tap is spluttering and spitting, is this normal?

The Minerva 3-in-1 tap dispenses boiling water at the outlet of the spout and, as a consequence, there will be some splutter, steam and noise. This can be quite off-putting at first, but any concerns are quickly dispensed with once the simple technique for operating the boiling water is understood.

Please visit the Minerva section of our website to see how the tap should dispense boiling water.

You will see the operator rotate the tap handle carefully to run off the lag of non-boiling water until the water starts to steam; they then stop, put the receptacle completely over the end of the taps spout and continues to dispense the boiling water, at the same time gradually lowering the receptacle. Adopting this method ensures all of the boiling water is contained and prevents any splashing your hands. 

I live in a hard water area, is this a problem?

MINERVA 3-IN-1: Like any kettle this depends on how hard the water is in a particular area. If you have a particular issue with limescale, you can contact Franke FilterFlow on 01603 875 468 to get another Inline Filter or a replacement type of filter that will do the job of reducing limescale. 

OMNI 4-IN-1: Hard water affects over 50% of the UK, but it is still variable within those areas. The Franke 08 filter cartridge that is supplied with an Omni system has been especially formulated to protect the boiler’s heating element from the adverse effects of limescale. This is why it so important for filter cartridges to be replaced every 6-9 months, depending on usage.

What is the warranty period?

On the Minerva 3-in-1 system, the warranty period is 2 years on the Heating Tank and 2 years on the Tap from date of purchase.

Omni 4-in-1 systems have a warranty period of 3 years from date of purchase. 

Guarantees valid only on products placed and used in normal domestic situations.

Can I install an Omni or Minerva system in a work environment such as an office?

The Omni and Minerva systems are only suitable and guaranteed for use in a domestic kitchen environment. A domestic installation would refer to either a home with single occupancy or a family environment. 

I am going on holiday – what should I do?

MINERVA 3-IN-1: Simply unplug the Heating Tank whilst you are away. On your return, plug the unit back in and turn on the boiling water tap to drain the water from the tank. Once the tank has refilled and heated (22 minutes) the tap can be used in the normal way.

OMNI 4-IN-1: Simply turn off the power switch on the tank, then turn the water supply off by rotating the shut off valve by 90º. On your return from holiday, simply turn the water supply back on, then switch on the power switch on the tank. We recommend allowing 15 minutes to let the tank get back up to temperature, then flush through the tank of water once. Allow tank to refill and heat back up. The product is now ready for use.

What is the Minerva Tundish and what does it do?

The Minerva Tundish is a plastic cup which hooks on to the pressure relief valve. Its job is to catch the drips from the Pressure Relief Valve, and it is also a water trap to prevent any unpleasant odours escaping from the sink waste. The Minerva tank is sealed, so it is supplied with a Pressure Relief Valve to allow it to vent. Once the tank is switched on and the water begins to heat, steam is created and the pressure starts to build. Once that pressure reaches 5 bar, the Pressure Relief Valve opens to relieve the pressure. The steam condenses on the end of the Pressure Relief Valve and drips into the Tundish. The Tundish is connected to the sink waste so the water can run to drain.

A common after sales issue is when installers or customers observe that the pressure relief valve has water constantly dripping or running into it. If that is the case, then the reason for it is as follows: The Pressure Relief Valve should not constantly release water. It will constantly drip for the first 20 minutes after the tank is switched on, it should then only periodically drip, either after you’ve drawn off some water, or just every now and then when the tank needs to come back up to temperature. If the Valve is constantly dripping or running then the cause usually high water pressure – water pressure exceeding 5 bar will cause the Valve to constantly release water because it is designed to open at that pressure. We recommend checking the water pressure with a gauge, and if it is near 5 bar fitting a pressure reducing/limiting valve fitted and limit the pressure to 3 - 4 bar. Pressure reducing valves are available from any good plumbers merchant and if high pressure is the problem then fitting one will solve it.

Franke FilterFlow
What does the Franke FilterFlow system remove?

Your Franke FilterFlow system will remove and reduce a wide range of possible contaminants from tap water. These include –

  • Chlorine
  • Harmful bacteria and cysts eg Cryptosporidium, Giardia
  • Heavy metals eg lead
  • Other chemicals eg pesticides, herbicides
  • Dirt, sediment, rust and other debris 
Will I really be able to tell the difference?

Absolutely! Everyone’s water is different, but most people can taste the difference between tap and water filtered using a Franke FilterFlow system immediately. Odours and unpleasant tastes will be gone, sediment, rust or other kinds of dirt will have been trapped by the ceramic in the filter system’s cartridge and you will have protection against harmful bacteria and cysts. It is likely that you will find tea, coffee and other hot drinks much more pleasant. But most importantly, you will enjoy the peace of mind that comes from drinking water that is refreshing and just as nature intended it.

How does the Franke FilterFlow system work?

Whatever style of tap you choose, your Franke FilterFlow system will have a stainless steel or durable ABS cartridge housing, which is fitted in the cupboard underneath your kitchen sink. Inside the housing is the unique Franke FilterFlow 03* filter cartridge, which is made from ceramic and carbon. When you use your tap, cold water is diverted through the filter cartridge, removing a wide range of possible contaminants. The filtered water is then ready to be dispensed via your tap.

The cartridge’s ceramic outer shell works to trap dirt, sediment and some types of harmful bacteria – some so microscopic that they are invisible to the human eye. Meanwhile, the cartridge’s inner core of carbon tackles unpleasant odours and tastes – for instance, chlorine.

Ceramic and carbon are proven filtration media and have been used safely for many, many years to effectively filter and cleanse water. By combining high quality micro porous ceramic and solid carbon together into one filter cartridge, the Franke FilterFlow system delivers an enhanced, comprehensive filtration performance that is far superior to many of the domestic filter taps and systems available today.

* Please note, the standard Franke FilterFlow filter cartridge is the Franke 03, which is comprised from both ceramic and carbon. However, due to localised water type, Franke FilterFlow systems supplied to Northern Ireland are likely to use the Franke 04 cartridge, which is made purely from carbon. Depending upon water quality, further alternative Franke FilterFlow cartridges are also available – please contact Franke FilterFlow for details. 

For more information on the Franke FilterFlow system please click here

How easy is the Franke FilterFlow system to install?

The Franke FilterFlow system is simple to install – it’s an easy, straightforward job for any plumber. Following installation, all you need to do is maintain the performance of your system is to replace the filter cartridge every 6 months. This is a simple procedure that – thanks to the Franke FilterFlow’s ‘easy-open’ housing and quick-fit cartridge are well within the scope of the average householder. 

How much space does the Franke FilterFlow system take up?

The Franke FilterFlow system is remarkably compact. The stainless steel housing measures 29cm high x 7cm wide x 9cm deep, and is usually fitted in the cupboard underneath the kitchen sink. The system’s hoses are similarly neat and unobtrusive – leaving plenty of storage space for all the usual undersink necessities! 

How often does the filter cartridge need replacing?

We recommend that filter cartridges should be replaced every 6 months. When you purchase your Franke FilterFlow system, please ensure you register it immediately. Registration can be completed online or by filling in and returning the registration card that is included with every Franke FilterFlow system. Registration will enrol you on the Franke FilterFlow replacement cartridge reminder scheme and extended parts warranty.

Genuine replacement cartridges for your Franke FilterFlow system can be purchased online at, by emailing or by calling 01603 875 468. Using official Franke FilterFlow cartridges will ensure both your peace of mind and that your flow of filtered water remains uncompromised. Authentic Franke FilterFlow cartridges are instantly recognisable by their use of patented red caps that are exclusive to Franke. 

Can I use the new generation of Franke FilterFlow cartridges with an older Franke Triflow system?

It is not possible to use the new Franke FilterFlow cartridges in Franke Triflow systems. However, it is possible to purchase an upgrade kit to replace the plastic or stainless steel housing of an existing Triflow tap with the latest Franke FilterFlow stainless steel housing. This is a complete kit that comprises of the latest stainless steel Franke FilterFlow undersink cartridge housing, stainless steel braided hoses and all connectors. Upgrading your Franke Triflow housing (whether stainless steel or plastic) is simple and straightforward – and will allow you to use quick-change Franke FilterFlow cartridges. 

Does the system tackle hard water?

The Franke FilterFlow 03 filter cartridge supplied as standard with your Franke FilterFlow system will not resolve what are essentially cosmetic concerns relating to water hardness – namely limescale and surface residues on hot drinks. In fact, the standard Franke 03 filter cartridge was designed primarily with health and security in mind and as such, actually retains calcium and magnesium. Both elements are regarded as beneficial for health, not to mention vital contributory factors to pleasant tasting water.

However, we do recognise that for some at least, hard water and limescale can be unpleasant. If you wish to address this, we would suggest changing your Franke FilterFlow system’s cartridge to an Franke 06 ‘Carbon De Alk’ cartridge at your first cartridge change. In addition, please note that the material used to make teabags can contribute to surface ‘scum’ on hot drinks. We recommend using traditional tea leaves and/or teabags that have been especially formulated for hard water areas, such as ‘Tetley’s’. 

What sort of water pressure does the system need?

Your Franke FilterFlow system relies upon water pressure to push water through the filter cartridge. However, there is no requirement for higher-than-average pressure. A minimum pressure of 1.5 bar / 23 psi is required. On no account should water pressure exceed 6 bar / 90psi.

If you are unsure of your water pressure, a qualified plumber will be able to measure it for you. If it is too low, your plumber will be able to advise you about fitting a small booster pump – or conversely, a suitable pressure reducing pump if the pressure is too high. 

What about the flow rate of the filtered water?

Based on pressure of 3 bar/45 psi, your Franke FilterFlow system should deliver 1 litre of water / per 25 seconds. For optimum performance, we recommend adjusting the stop valve on your system to allow a delivery of 1 litre of water/per 30 seconds. 

Is there a guarantee?

Yes – the housing system and components of your Franke FilterFlow are guaranteed for 5 years from the date of purchase. 
Guarantees valid only on products placed and used in normal domestic situations.
For full guarantee details, please contact –

Customer Services
Franke FilterFlow
3 Old Winery Business Park
Chapel Street
Norfolk NR10 4FE

Telephone: 01603 875 468

Waste Disposers
Does my Franke Turbo Elite Waste Disposal Unit have an 'Auto Reverse Function'?

One of the advantages that the Franke Turbo Elite Permanent Magnet Motor disposers have over standard Induction Motor WDUs is the starting torque - Franke Turbo Elite WDUs are up to full speed within the first revolution.

Most jams occur at start-up because food waste will be stuffed into the disposer until it is full (this is not the correct way to use the disposer but is more reality).

The Franke Turbo's initial high starting torque gives it the advantage to break through the waste already put into the disposer. Under similar conditions an induction motor disposer can jam as it tries to push the waste around while it builds up speed. When the induction type motor cannot push any more and becomes jammed the "Auto Reverse" feature gives the ability for the unit to run in the opposite direction to break away from the jam condition.

I am fitting a Waste Disposal Unit to my sink - how do I connect the overflow?

As the overflow would normally connect to the Basket Strainer Waste, you need to purchase either a WDU Connector for a single bowl sink, or a WDU Converter for a bowl and a half sink. These can be purchased from our service agents.

Is a Waste Disposal Unit expensive to operate?

A Franke Turbo Elite Waste Disposal unit consumes roughly the same power in one month to lighting a 100 watt light bulb for one hour, therefore operating costs are relatively low. The high torque fast grinding Franke Turbo units use very little water.

What is the difference between a Batch Feed and a Continuous Feed Waste Disposal Unit?

A Batch Feed model is activated by loading the chamber and rotating the WDU plug. Continous Feed models are operated by an Air Switch (or alternative) and waste is fed through the open neck of the unit. In both cases, a continuous supply of water is necessary whilst the WDU is in use. 

What is the warranty on Franke Turbo Elite Waste Disposal Units?

Franke Turbo Elite Waste Disposal Units carry a 10 year warranty. For further information see our Guarantee page.   

When someone does NOT wish to utilise the Air Switch (eg if they are hard wiring the WDU to a standard electrical switch below the cabinet etc.) what is the procedure?

The procedure is as follows:

  1. With the disposer mounted on the sink and line cord connected to a wall outlet receptacle, turn "ON" the wall mounted switch.
  2. If the disposer is "OFF", depress air switch actuator to turn the disposer "ON".
  3. With the disposer " ON " pull air switch hose from disposer connectionn and discard air switch actuator and hose.
  4. Turn the disposer "OFF" by turning off the switch, usually controlled by a wall mounted switch.
  5. Operation of disposer is now controlled in a typical manner by the wall mounted switch. 
What is a Waste Disposal Unit 'Air Switch'?

The Franke air activated control switch button operates continuous feed waste disposal units from a point determined by the consumer, eg on the worktop or possibly even within the sink perimeter.

Air switches are safer than electric switches because they keep the electricity away from the users' hands. The air switch control mechanism usually mounts under the sink (or is incorporated into the Waste Disposal Unit itself), where it remains dry. From the activated control switch button, an air tube connects with the switch controller, which in turn operates the unit.

The benefit is that the operational switch avoids the necessity to have a wall mounted toggle switch (which itself is electrical), and is therefore neater and safer to operate .

Do I have to install a hood on an outside wall?

No, hoods can be installed onto party walls, or suspended from a ceiling. To install a hood in recycling mode (i.e. with no ducting to outside) a Charcoal Filter must also be purchased - these can be obtained from our hood service agents click here.

There are several different types of Charcoal Filter - the specific filter required is shown on the individual hood product page, and is also shown in our Specialist Brochure.  

How do I clean my Stainless Steel hood?

Your Franke Stainless Steel Hood should be cleaned using a damp cloth and a neutral liquid detergent. Alternatively you can use Inox Crème and / or an E-Cloth.

How do I obtain a Carbon Filter for my Franke hood?

There are several types of Carbon Filter depending on which model of Franke hood you have. To purchase a filter please contact our hood service agents click hereThe specific filter required is shown on the individual hood product page, and is also shown in our Specialist Brochure. 

How do I clean the filters on my cooker hood?

All Franke cassette filters can be cleaned with hot water and mild detergent in the sink. Alternatively, stainless steel filters can be put into the dishwasher. 

I am buying a 90cm hob - what size hood do I need?

You should purchase a hood no smaller than your hob size, eg when buying a 90cm hob you should purchase a hood measuring at least 90cm. 

How do I work out the size of extractor fan that I need?

An effective hood must be powerful enough to change the air in the room 10 times an hour, when in operation.

To decide which hood to choose, first calculate the volume of the room. This figure can be arrived at by multiplying room length x width x height. So a kitchen that is 4 x 4 x 2.5 metres has a volume of 40 m3.

This room volume figure is then further multiplied by 10 to obtain the optimum rate of airflow for that room, based on the need to change the air ten times an hour. So a kitchen of 40 m3 x 10 = 400 - meaning it would require an extraction rate of 400 m3/h for efficient ventilation of the room. 

I have lost my Instruction Manual, what can I do?

All Instruction Manuals are available to download from our website, by clicking on the relevant hood model. 

I seem to be getting a lot of condensation from pans on my induction hob on the face of my glass hood, what can I do?

Induction hobs are a very energy efficient way of cooking. They do not produce any heat themselves, but cause the pan to become hot through their electromagnetic induction. This lack of extraneous heat however does have a side effect in that there is no hot air, as you would find in a conventional electric or gas hob, to warm any cold surfaces that water vapour from what is being cooked may come into contact with. Consequently, some of the water vapour and steam produced by the cooking process will condense on these cold surfaces. The amount of condensation on any particular surface will depend on many factors including the ambient temperature in the kitchen, the ambient temperature of the surfaces, the thickness and material from which the surface is made and the type of cooking. 

If I have a Carbon filter how often does this need changing? Can I do this myself?

It is simple to change a Carbon filter, and replacement depends on how much the hood is used, as well as they type of cooking. Ordinarily a filter should be replaced every 2-3 months. 

What is the warranty on Franke Decorative Hoods?

The Franke Decorative Hoods guarantee covers the costs of parts and labour in the event of a breakdown, caused by mechanical or electrical failure of the appliance, for 24 months from the date of purchase. Guarantees valid only on products placed and used in normal domestic situations. For more information click here

Where can I obtain replacement bulbs and other spares for my Franke Decorative Hood, or complain if I have a problem?

Please contact the appliance service department, as follows:

UK & Northern Ireland After Sales Service: 
Tel: 0844 371 0195 
Fax: 0844 371 0198 


Republic of Ireland After Sales Service Information: 
Tel: + 353 1 413 6481
Fax: + 353 1 413 6489 

In all other respects, please contact Franke UK Ltd on  

Frames by Franke

Frames by Franke is a complete range of premium kitchen appliances which has been developed to work together aesthetically and as a system. The range is available to buy from selected retailers which can be found in the dealer locator on the website. Please contact a dedicated Frames by Franke retailer from the list on our WHERE TO BUY page to help with your inquiries with this particular product range. 

Choosing a Retailer
Authorised Internet Partners

Franke UK Ltd believes that excellent service before and after the sale is an integral part of the Franke experience. We strongly encourage you to thoroughly research any retailer before making a purchase to ensure that you are getting what you expect, and the service and support that Franke strives to deliver.

To view a list of companies are authorised to sell a selected range of Franke products online click here.

General FAQs
How can I link to the Franke website or obtain a Franke logo?

Please contact our office by email or by telephone on 0161 436 6280. 

How do I obtain brochures?

Go to the Brochure page on this site. Franke Retailers should contact their Distributor to obtain brochures. 

If you would like a brochure pack to be posted to you please complete the Contact Form with your address details.