A method of installation approved by the water undertakers (water suppliers) under Regulation 4 of the Water Supply (Water Fittings) Regulation/Scottish Water Byelaws. Regulations 4 (6) & 12 of th [..]

"An air gap" means a visible, unobstructed and complete physical air break between the lowest level of water discharge and the level of potentially contaminated fluid downstream (critical wa [..]

A person who– (a) has been approved by the water undertaker for the area where a water fitting is installed or used, or (b) has been certified as an approved contractor by an organization specified in [..]

Flow upstream, that is in a direction contrary to the intended normal direction of flow, within or from a water fitting. Interpretation given in Schedule 2: of the Water Supply (Water Fittings) Regula [..]

A British Standard in four parts, last updated in 2014, entitled ‘Suitability of non-metallic materials and products for use in contact with water intended for human consumption with regard to their e [..]

A universally used unique numerical identifier allocated to a chemical substance by the Chemical Abstracts Service (CAS). A CAS Registry Number itself has no inherent chemical significance but provide [..]

A fixed container for holding water at atmospheric pressure. Interpretation given in Schedule 2: of the Water Supply (Water Fittings) Regulations and Scottish Water Byelaws read more

A cistern for supplying cold water to a hot water system without a separate expansion cistern Interpretation given in Schedule 2: of the Water Supply (Water Fittings) Regulations and Scottish Water By [..]

A water fitting which – is installed below ground; passes through or under any wall, footing or foundation: is enclosed in any chase or duct; or is in any other position which is inaccessible or rende [..]

Includes any reduction in chemical or biological quality of water due to a change in temperature or the introduction of polluting substances. Interpretation given in Schedule 2: of the Water Supply (W [..]