Watts 4" 774 Double Check Detector Assembly (774DCDA-OSY-CFM)

Series 774DCDA Double Check Detector Assemblies are designed for use in accordance with water utility non-health hazard containment requirements. It is mandatory to prevent the reverse flow of fire protection system substances, i.e., glycerin wetting agents, stagnant water and water of non-potable quality from being pumped or siphoned into the potable water supply. Features Torsion spring check valve provides low head loss Short lay length is ideally suited for retrofit installations Stainless steel body is half the weight of competitive designs reducing installation and shipping cost Stainless steel construction provides long term corrosion protection and maximum strength Single top access cover with two-bolt grooved style coupling for ease of maintenance Thermoplastic and stainless steel check valves for trouble-free operation No special tools required for servicing Compact construction allows for smaller vaults and enclosures Furnished with 5/8" x 3/4" (16x19mm) bronze meter (gpm or cfm) Detects undergr...