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this unit provides protection for internal components in indoor environments
It serves as a direct cross-reference for legacy part numbers including 473561B-11
OEM gaskets like the 09RA0221282 are built to exact factory tolerances
This specific model is optimized for 60Hz frequency
meaning it will reset itself once temperatures return to the safe operating range designated by the 120°F closing threshold
Watts 0121494 Relief Valve Freon this unit provides protection forThe Watts 0121494, also identified as the LF174A 1 75, is a high capacity pressure relief valve designed specifically for hot water heating boilers and hydronic heating systems. Featuring a 1 inch female NPT inlet and outlet, this Lead Free copper silicon alloy valve provides robust protection against over pressure conditions with a factory set relief pressure of 75 PSI. With a massive steam discharge capacity of 2,055,000 BTU hr, it is engineered for
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