Water Supply Industry Interpretations and Advice

  • Area of Interest : Installation
  • Topic : Discharge pipes
  • Title : Discharges from condensing boilers
  • Clause Reference : Schedule 2 paragraph 19 & G19.4
  • Reference Number : I14
  • Decision Date : February 2003

The expansion relief valve and the condensate discharge pipes of condensing boilers must be arranged so that their outlets can be observed to have satisfactory air gaps above any tundish which conveys the discharge and so that a discharge from either one can be observed independently of the other.