Watts 800M4QT-SH 1 1/2 - Part of the 800M4QT Series Strip Drian a loose-set heavy-duty ductile-iron grate

a loose-set heavy-duty ductile-iron grate over a 24½″ square opening

and adaptability to unique roof designs

Features Use with 2 1/2 to 10 IN 994 Series

This 1/2 IN angle balanced pressure-duplex phosphor diaphragm is a highly sensitive modulation unit thermally programmed to provide accurate steam conserving operation at all pressure temperature points within its range of operation

and pressure relief setpoint of 75 psi

Watts 800M4QT-SH 1 1/2 - Part of the 800M4QT Series Strip Drian a loose-set heavy-duty ductile-iron grateThis 1 1 2 inch anti siphon pressure vacuum breaker backflow preventer helps prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, a bonnet with silicone rubber O ring seal, a lightweight plastic disc float, lever handle shutoff, and test cocks for winterization draining.