Water Supply Industry Interpretations and Advice

  • Area of Interest : Backflow prevention
  • Topic : Fluid category
  • Title : Non-domestic hose union taps and use of Fluid Category 5 categorisation
  • Clause Reference : Schedule 2 paragraph 15 & G15.3
  • Reference Number : B08
  • Decision Date : June 2001 (revised February 2012)

Water suppliers take account of government guidance in their enforcement of the Water Supply (Water Fittings) Regulations, Byelaws in Scotland, but guidance cannot cover all circumstances.

The categorisation of non-domestic hose union taps as a fitting that require fluid 5 protection is a recognition that in some non-domestic situations the fluids at risk of being present will be more serious health hazard. Water suppliers do however adopt a risk based approach to their enforcement of the Water Supply (Water Fittings) Regulations/Byelaws and where a risk assessment indicates that the risks associated with an individual hose union tap are less than fluid category 5 they will accept alternative approaches.