Watts 0121542 Relief Valve R-22 and PA-800 remote probe controllers

and PA-800 remote probe controllers

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Watts 0121542 Relief Valve R-22 and PA-800 remote probe controllersThe Watts 0121542 is a high capacity boiler pressure relief valve designed for commercial and industrial hydronic heating systems. Specifically engineered for hot water heating supply boilers, this 1. 5 inch LF174A valve provides critical protection against excessive pressure buildup. It features a robust lead free copper silicon alloy body and is factory set at 50 PSI. With a massive relief capacity of 2,950,000 BTU hr, the 174A series is the