Watts 174A 110 FS 1 1/2 - Part of the 174A Series American Wick Drain Large free-area design to handle

Large free-area design to handle ample flow from planting zones and green roof surfaces

60 mil and 80 mil (a mil is a 1

Suitable for heavy-duty exterior environments requiring high flow capacity

1 gallon expansion tank

Watts 174A 110 FS 1 1/2 - Part of the 174A Series American Wick Drain Large free-area design to handleThis pressure relief valve has a 1 1 2 inch NPTF female inlet and outlet and a 110 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.