A standard orifice wrench or deep-well socket is recommended to ensure the part is seated squarely without damaging the precision-machined edges

this unit is rated for low-pressure steam applications up to 15 psig

For technicians servicing vertical stack or ceiling-mounted units

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

you know that timing and accuracy are paramount when preventing coil freeze-ups

Watts 0274683 Valve 320734-701 A standard orifice wrench orFor 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