Watts 374A-3/4 Boiler Pressure Relief ValveWatts 374A 3 4 Boiler Pressure Relief Valve is a trusted safety device for hot water space heating boilers. The lever type design pairs a durable iron body with a forged brass inlet and a 3 4 inch outlet to deliver reliable overpressure protection in residential and commercial systems. Set to relieve at 30 PSI with a broad operating range from 30 to 150 PSI, it guards against dangerous pressure buildup while supporting consistent boiler performance.

and factory pre-charged air

a compact digital non-programmable control designed for 1-Heat (Heat Pump)

Pilot gas connection 1/4 inch compression

Current at output: 35 Milliamp RMS

and enhances overall burner safety

reliable sealing

Vent: Intermediate atmospheric vent for proper pressure balance

dependable fill alerts

84 inch in diameter and 16 inches long

The actuator is designed for multiple spring ranges to adapt to system pressure: Yellow 3–7 PSIG

gas furnace controls

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