The Watts 0121542 is a high-capacity boiler pressure relief valve designed for commercial and industrial hydronic heating systems

determining when the valve begins to open as the sensor bulb heats up

ensuring it can handle the high-volume discharge required for commercial-grade heating systems

Versatile Compatibility: Designed for seamless integration as a pneumatic positioner on a variety of Spence main valve bodies

the automatic reset function restores the circuit for continued operation

Lochinvar & A.O. Smith 100109424 Valve 322838-753 The Watts 0121542 is aThe Lochinvar & A. O. Smith 100109424 Valve is a specialized Intellivent gas control valve engineered for precision fuel regulation in high efficiency residential and light commercial natural gas water heaters. As a veteran grade OEM replacement gas valve, it features a 1 2" NPT inlet outlet and is factory set for a 4. 2" WC manifold pressure to ensure optimal combustion stability. This gas control thermostat incorporates an integrated ECO (Energy Cut