Simplify your plumbing projects with the Cash Acme dual check valve. Composed of strong and sturdy lead free DZR bronze with a brass union inlet, this backflow relief valve is easy to install and prevents backflow of contaminated water into potable water supply lines. The dual check valve features a straight through design to minimize pressure drop, and features a maximum temperature 140 degrees F (60 degrees C) and a maximum pressure of 175 PSI.