Watts 174A 140 FS 1 - Part of the 174A Series ground-shipping Simplifies installation and improves access

Simplifies installation and improves access for maintenance and inspection

Maximum temperature 250 degrees

ZN554-4NH-TC

Rated for heavy-duty commercial load environments

Designed for overflow drainage in extensive green roof systems

Watts 174A 140 FS 1 - Part of the 174A Series ground-shipping Simplifies installation and improves accessThis pressure relief valve has a 1 inch NPTF female inlet and outlet and a 140 psi pressure relief setpoint. The valve can be used for hot water space heating boiler applications to protect against excessive pressure. It features a bronze body, non metallic disc to metal seating, and test lever. Includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve.