2015 UPC Code Update: Water Supply and Distribution: Discharge Piping

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PHCC of California is proud to partner with IAPMO to provide code update information to the PHCC of California Membership.  CAPHCC will present updates from the 2015 Uniform Plumbing Code in accordance with our mission statement:

PHCC is dedicated to the promotion, advancement, education and training of the industry, for the protection of our environment and the health, safety and comfort of society.

March’s featured code change:

2015 UPC, Chapter 6
Water Supply and Distribution, Page 105
608.5 Discharge Piping

Which reads as follows:

The discharge piping serving a temperature relief valve, pressure relief valve, or combination of both shall have no valves, obstructions, or means of isolation and be provided with the following:

1.  Equal to the size of the valve outlet and shall discharge full size to the flood level of the area receiving the discharge and pointing down.
2.  Materials shall be rated at not less than the operating temperature of the system and approved for such use.
3.  Discharge pipe shall discharge independently by gravity through an air gap into the drainage system or outside of the building with the end of the pipe not exceeding 2 feet (610 mm) and not less than 6 inches (152 mm) above the ground and pointing downwards.
4.  Discharge in such a manner that does not cause personal injury or structural damage.
5.  No part of such discharge pipe shall be trapped or subject to freezing.
6.  The terminal end of the pipe shall not be threaded.
7.  Discharge from a relief valve into a water heater pan shall be prohibited.

This information has been reprinted with permission from IAPMO.