While the McDonnell & Miller FS8-W is excellent for closed-loop HVACR

Common Questions What is the purpose of the blower door safety switch

Installation is streamlined with a 3/8" NPT high-pressure connection and 1/8" NPT low-pressure and vent ports

it utilizes a porous molded core to effectively capture moisture

Optimized Voltage Handling: Rated for 370 volts

Watts 88004110 Valve 30067439-890 While the McDonnell & MillerThe Watts 88004110 LF009 QT FS 1 2" Reduced Pressure Zone Backflow Preventer Assembly is a high performance solution for protecting potable water supplies from high hazard cross contamination. This lead free RPZ valve serves as the direct replacement for Watts 0391002, featuring a lead free copper silicon alloy body for maximum corrosion resistance and compliance with plumbing codes. Designed for high risk applications, this assembly prevents both