Plumbing Regulations 2018

Water supply work is—

the construction, installation, replacement, repair, alteration, relining, maintenance, testing or commissioning of—

any part of a heated or cold water service that is connected to a drinking water supply from the point of connection to the water supply to the points of discharge of the service; and

any part of a non-drinking heated or cold water service or rainwater service, from the point of connection to the water supply to the points of discharge of the service; and

any heated water service in, or on, a caravan or vessel; and

any design work that is incidental to, or associated with, any work described in paragraph (a).

Water supply work does not include—

work described in subregulation (1) that is carried out in connection with the supply of piped non-drinking water for agricultural purposes unless the water is supplied by a network utility operator or other water provider; or

the treatment of water used in a heated or cold water service; or

refrigerated air-conditioning work; or

backflow prevention work; or

on and from 18 November 2019, thermostatic mixing valve work.