ensuring reliable performance in both heating and cooling applications

allowing the HVAC control board to maintain the gas valve in the open position

if your application requires a crankcase heater control

For technicians servicing vertical stack or ceiling-mounted units

Using it with R-22 will result in improper refrigerant metering and potential system failure

Watts 0274683 Valve 320734-701 ensuring reliable performance in bothFor high output heating systems requiring robust overpressure protection, the Watts 0274683 (Series 174A 100) is a critical component for both residential and commercial hot water supply boilers. This 3 4 inch pressure relief valve is engineered with a durable bronze body and features an ASME Section XIII certification, ensuring it meets rigorous safety standards for emergency relief. With a factory set point of 100 PSI and a high steam discharge