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the R42640-001 mitigates common furnace ignition failure issues by ensuring the flame sensor remains free of excessive carbon buildup and the ignitor reaches peak temperature rapidly
or an improperly sized return air drop
This 3/4" OD service valve is the factory-authorized replacement for 61-21368-15
Durable Construction: UL listed for operating pressures up to 650 psi
The internally fused secondary provides critical overload protection
Watts 0121449 Valve 30067439-890 the R42640-001 mitigates common furnaceThe Watts 0121449 is a high performance 140S 3 3 4" 150# automatic reseating temperature and pressure relief valve, engineered specifically for commercial water heater protection. As a veteran in the field, you know that domestic hot water supply tanks require precise thermal and overpressure mitigation. This unit features a robust bronze body construction with 3 4 inch NPT female inlet and outlet connections. The integrated 3 inch thermostat utilizes