Watts 800M4QT 1/2 - Part of the 800M4QT Series nwgf these hatches are compatible with

these hatches are compatible with OSHA-compliant safety railings and available in a broad selection of sizes

Flexible Slope Options – Available in both constant-depth and pre-sloped versions to fit slope and drainage requirements seamlessly

Includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve

making it ideal for installations in high-traffic or dirty environments

watertight connection to the roof membrane

Watts 800M4QT 1/2 - Part of the 800M4QT Series nwgf these hatches are compatible withThis 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, tee handle shutoff, and test cocks for winterization draining. It is