Glossary



  • PAG

    The Product Assessment Group (PAG). The purpose of this committee is to raise awareness of the requirements of the Water Supply (Water Fittings) Regulations/Scottish Water Byelaws and promote compliance of products and materials with the read more

  • Pressure flushing cistern

    A WC flushing device that utilises the pressure of water within the cistern supply pipe to compress air and increase the pressure of water available for flushing a WC pan. Interpretation given in Schedule 2: of the Water Supply (Water Fittings) read more

  • Pressure flushing valve

    A self-closing valve supplied with water directly from a supply pipe which when activated will discharge a pre-determined flush volume. Interpretation given in Schedule 2: of the Water Supply (Water Fittings) Regulations and Scottish Water read more

  • Pressure relief valve

    A pressure-activated valve which opens automatically at a specified pressure to discharge fluid. Interpretation given in Schedule 2: of the Water Supply (Water Fittings) Regulations and Scottish Water Byelaws read more

  • Primary circuit

    An assembly of water fittings in which water circulates between a boiler or other source of heat and a primary heat exchange inside a hot water storage vessel, and includes any space heating system. Interpretation given in Schedule 2: of the read more