1" Female NPT Inlet X 1" Female NPT Outlet, Set at 45 PSI, 1,802,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 50 PSI, 1,956,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 60 PSI, 2,265,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve

1" 70#H2O

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 75 PSI, 2,728,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 80 PSI, 2,883,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 100 PSI, 3,500,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 110 PSI, Hot Water High Capacity Pressure Relief Valve

1" Female NPT Inlet X 1" Female NPT Outlet, Set at 125 PSI, 4,272,000 BTU Capacity, Hot Water High Capacity Pressure Relief Valve