The 1/2-in. 760 Dual Check Valve Backflow Preventer with Intermediate Atmospheric Vent provides low health hazard protection from backflow in both residential and commercial applications, primarily from a residential boiler or small commercial boiler. Features of this continuous pressure type backflow preventer include a threaded atmospheric vent drain for safe drainage, and corrosion-resistant, high quality brass body construction with an integral stainless steel strainer screen to prevent buildup of unwanted debris. Threaded FNPT union connections are standard and included on both ends.