The 1 inch brass check valve keeps prime in jet, submersible, and centrifugal pumps. When a pump shuts off, the check valve closes preventing the water from traveling back to the source. This check valve is constructed of heavy brass material. 1" Solid-brass Keeps prime in jet, submersible, and centrifugal pumps Spring
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov