This part of BS 6920 specifies requirements for the suitability of non-metallic (including cementitious) materials and products, and also water fittings and components, pipes and materials used in coating, protection, lining, jointing, sealing and lubrication, for use in contact with either hot or cold water intended for human consumption, with regard to their effect on the quality of the water. This standard is not applicable to metallic materials and products. NOTE Under the requirements of a) Regulation 31 of the Water Supply (Water Quality) Regulations 2000. Statutory Instrument 2000, No. 3184 (England) [1]; b) Regulation 31 of the Water Supply (Water Quality) Regulations 2010. Welsh Statutory Instrument 2010, No. 994 (W.99) [2]; c) Regulation 27 of the Water Supply (Water Quality)(Scotland) Regulations 2001. Scottish Statutory Instrument 2001, No. 207 [3]; d) Regulation 30 of the Water Supply (Water Quality)(Amendment) Regulations (Northern Ireland) 2009. Statutory Rules of Northern Ireland 2009, No. 246 [4]; e) Clause 2, Schedule 2 of the Water Supply (Water Fittings) Regulations 1999. Statutory Instrument 1999, No. 1148 (England and Wales) [5]; f) Clause 2, Schedule 2 of the Scottish Water Byelaws 2004 [6]; g) Clause 2, Schedule 2 of the Water Supply (Water Fittings) Regulations (Northern Ireland) 2009. Statutory Rules of Northern Ireland 2009, No. 255 [7]; in some cases national authorities or regulators might require specific additional testing to be carried out on extracts from certain types of these materials; interpretation of the results from additional testing is the responsibility of the requesting body.