Basic installation kit for PROTRONIC - A3000 open opto-electronically controlled washing-unit fitting for in-wall mounting. With facility for externally controlling the options such as fitting settings and communication via ECC function controller. Consisting of w all-installation box, lockable water quantity regulator, flush connector for flushing and pressure testing according to DIN 1988, waterproof electric T-junction for connecting to system cable and shell protection.