Double Check Valve Assembly, Series Watts 774, Size 6 in., Connection Flanged, Body Material Stainless Steel, Temp. Range 33 to 110 Degrees F, Max. Temp. 110 Degrees F, Max. Pressure 175 psi, Width 11 in., Length 48-1/2 in., Height 21-1/2 in., Features NRS Shutoff, Short Lay Length, Standards AWWA C510-92, CSA B64.5, Compliance ASSE 1015, FM Approved (4 in. to 10 in. OSY Only) UL Classified (OSY Only)