Backflow Preventer, Dual Check Valve, .75-In. Tub & Shower Doors For use as a rafter

For use as a rafter square

Built to deliver long-term

fully automatic charger/maintainer

The tool features a lightweight compact design

Keep your drains and traps running freely with a regular application of K-67

Backflow Preventer, Dual Check Valve, .75-In. Tub & Shower Doors For use as a rafter3 4", back flo preventer, dual check valve, use at drinking water supply service entrance or individual outlets, for non health hazard residential water system containment & continuous pressure applications, install vertically or horizontally, temperature range 33 to 180 degrees Fahrenheit, minimum working pressure 10 psi to maximum working pressure 150 psi, buna n seals & stainless steel springs, meets asse 1023 & csa b64. 6, wetted surface of this