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Precision Sensing: Features high-precision temperature sensing technology to minimize offset and prevent unnecessary equipment cycling
optimizing the performance of separated combustion heaters
or audible "chattering" from the relay contacts due to voltage drops or mechanical fatigue
Designed specifically for Reznor PDH series units—including PDH 75
Watts 0121463 Relief Valve 30067439-890 Precision Sensing: Features high-precision temperatureThe Watts 0121463 (Model LF174A) is a high capacity pressure relief valve designed specifically for hot water heating boilers and hydronic systems. Featuring a 3 4 inch NPT inlet and outlet, this valve is engineered with a lead free copper silicon alloy body to meet stringent potable water requirements while ensuring long term corrosion resistance. It is factory set to 40 PSI and provides a massive steam discharge capacity of 800,000 BTU hr, making it