The installation, connection, alteration, repair or disconnection of a water fitting must be carried out in a workmanlike manner, which is to say the work must be carried out so as to conform:-
- to an appropriate British Standard, a European technical approval or some other national specification of an EEA state which provides an equivalent level of protection and performance;
- to a specification approved by the Regulator; or
- to a method of installation approved by the water undertaker.
Requirements of Regulations 4 (5) &(6) of the Water Supply (Water Fittings) Regulations