Performance Requirements for Trap Seal Primer Valves- Potable Water Supplied
ANSI approved: February 2021
Devices covered by this standard are designed primarily to supply water to drain traps which have infrequent use and in which water evaporation would allow sewer gas to enter the premises. This device is located in the domestic water distribution system and is designed to supply potable water to a drain trap to maintain the water seal. A means for the prevention of backsiphonage shall be incorporated as part of the device.
A downloadable version of this standard is also available.