Water Supply Industry Interpretations and Advice

  • Area of Interest : Installation
  • Topic : Single check valves
  • Title : Backflow protection on fire protection systems considered to be a fluid category 2 risk
  • Clause Reference : Regulation 3 (2), Schedule 2 paragraph 15 (1) & G 15.29
  • Reference Number : I40
  • Decision Date : November 2013

Fire fighting system may be categorised as a fluid category 2 backflow risk. Where the backflow protection is provided in the form of a single check valve, the valve must be installed as close as practical to the supply pipe.