Watts 0358553 Valve Els PW 17895 The Cleveland Controls DFS-423 is

The Cleveland Controls DFS-423 is a high-performance fixed setpoint air pressure switch designed for HVAC proof of flow and combustion air monitoring

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Watts 0358553 Valve Els PW 17895 The Cleveland Controls DFS-423 isThe Watts 0358553 (Model 374A 3 4 30) is a high capacity boiler pressure relief valve engineered specifically for hot water space heating boilers. This critical safety component provides overpressure protection with a fixed 30 psi pressure relief setting and a discharge capacity of 550,000 BTU hr. Designed for professional hydronic heating systems, it features a durable iron body construction and a forged bronze inlet to withstand demanding contractor