Water Supply Industry Interpretations and Advice

  • Area of Interest : Installation
  • Topic : WCs flush volume
  • Title : Marking to show intendedflush volume
  • Clause Reference : Regulation 4 & Schedule2 paragraph 25 (f)
  • Reference Number : I42
  • Decision Date : June 2014

As part of a complete WCsuite, where the component parts are particular to that make/model and are not interchangeable with any other make/model, either the cistern or the flushing valve can be marked to show the intended flush volume.  This marking can be in any plane so long as it is readily identifiable.