See owner's manual for details

the sequence of action is as follows:

This drum is United Nations certified to HM-181 (1H2/X120/S) and HM-181 (1H2/Y180/S) and meets DOT 49 CFR 173

Bradley 125-041 Washer

Aquatrol Bronze Adjustable Relief Valve, MNPT Inlet Type, FNPT Outlet Type - 69B1S-300 Waste Receptacle See owner's manual for detailsSeries 69 Relief Valves, Max. temp.: 450F,Field adjustable pressure is factory set to midrange for minimal effect on flow capacity rates. Adjustment requires no disassembly; simply remove hex cap. Closed bonnet, sealed hex cap, and lapped metal seating eliminate leakage. Stainless steel springs. MNPT x FNPT connections. For pressure relief, liquid relief, continuous bypass, and overprotection for pumping stations, tanks, hydraulics, fluid, and