Bronze Anti-Syphonic Valve
1.5" vertically mounted vacuum relief and pressure sealing vent valve for marine plumbing systems. This sturdy valve is designed to withstand extra pressure aboard ship, and allows for venting as well as sealing in the lines.

The valve is made from bearing bronze, is theaded, and contains a polyvinyl chloride (PVC) disc which is completely impervious to marine corrosion.