Watts 174A-135 1 1/2 - Part of the 174A Series Tactile Paving 8 inch thermostat with special

8 inch thermostat with special thermo-bonded coating

overflow roof drain features a flashing clamp with an integral 4 inch internal standpipe

Designed to accommodate large flanges and liquid-applied roof membranes

Adjustable square nickel-bronze strainer with hinged solid cover for access and protection

Watts 174A-135 1 1/2 - Part of the 174A Series Tactile Paving 8 inch thermostat with specialThis 1 1 2 inch boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non metallic disc to metal seating, stainless steel spring, and test lever. It resists corrosive water conditions,