37C73U-174 GAS WATER HEATER CTL, FOR NAT GAS ONLY, 1/2" N.P.T. INLET, 1/2" INV FLARE OUTLET, 70 F-155 F RANGE, FULLY REG. MAIN AND PILOT REG. FIXED AT 5.0" W.C., SINGLE CYCLE E.C.O. SET AT 195 F, SHANK LENGTH 1-1/4 , REPLACES A.O. SMITH (186300-000), WHITE-RODGERS 37C73U-652