Watts 0383942 Relief Valve Els PW 29614 the 64460-001 provides the backbone

the 64460-001 provides the backbone for reliable electrode firing in high-demand environments

It is rated for 15 PSI for saturated steam and 60 PSI for hot water applications

The 26-504-01 is primarily designed for industrial HVACR and mechanical piping

For standard runs

While it may fit select Invensys valves when used with specific mounting kits

Watts 0383942 Relief Valve Els PW 29614 the 64460-001 provides the backboneThe Watts 0383942 (Model 740 1 1 2 75) is a high capacity ASME Section IV safety relief valve engineered specifically for liquid filled hot water heating boilers and storage tanks. Featuring a 1 1 2 inch NPT threaded inlet and outlet, this valve is factory set to discharge at 75 PSI with a massive steam equivalent relief capacity of 5,909,000 BTU hr. The Watts 740 series utilizes a large orifice design and a silicon coated EPDM disc to ensure positive