Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding·Page 6·84
Regulation 84: Application and interpretation
Regulation 89 applies to dwellings when they are erected or formed by a material change of use. The regulation defines key terms used in Part P including domestic hot water, sanitary accommodation, sanitary appliances, sanitary pipework, underground foul drainage, and urinal.
84.—(1) Regulation 89 applies when a dwelling is—
(a) erected; or
(b) formed by a material change of use.
(2) In this Part—
"Domestic hot water" means water that has been heated for ablutionary, culinary and cleansing purposes irrespective of the type of building;
"Sanitary accommodation" means a room or space which contains a water closet or urinal whether or not it contains other sanitary appliances;
"Sanitary appliances" includes a water closet or urinal and a bath, shower, washbasin, bidet or other fitting for ablutionary purposes;
"Sanitary pipework" and "underground foul drainage" have the meanings assigned to them by regulation 78 in Part N; and
"Urinal" includes one or more slabs, stalls, troughs, bowls and other suitable receptacles.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet P - Sanitary Appliances Unvented Hot Water Storage and Scalding.pdf