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As an industry-standard replacement part
It is rated for 15 PSI for saturated steam and 60 PSI for hot water applications
Optimized Combustion Safety: Specifically engineered to direct hazardous flue gases away from the structure
For standard runs
Watts 0383942 Relief Valve Els PW 29614 As an industry-standard replacement partThe 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
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