Watts 174A-135 1 1/2 - Part of the 174A Series Tactile Paving overflow roof drain features a

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

This 3/4 inch lead free dual check vacuum breaker backflow preventer prevents the reverse flow of polluted water from entering into the potable water supply

The 20-gauge Stucco Wire Lath is ideal for one-coat stucco applications

Designed to accommodate large flanges and liquid-applied roof membranes

four retaining nuts

Watts 174A-135 1 1/2 - Part of the 174A Series Tactile Paving overflow roof drain features aThis 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,