Water Supply Industry Interpretations and Advice

  • Area of Interest : Installation
  • Topic : Stop valves
  • Title : Screwdriver operated spherical valves
  • Clause Reference : Regulation 3 (2) (i) & G10.1
  • Reference Number : I37
  • Decision Date : March 2013

For ease of operation and to prevent any unnecessary delay in isolating the water supply, only spherical valves with an integral operating handle or lever should be used as stop valves.