What is the benefit of the flare-to-flare design

Durable Construction: Features a forged brass body and Buna-N paddle for superior sealing and resistance to wear in closed-loop systems

The rugged construction ensures long-term performance under continuous duty cycles

Look for visible cracking

Ideal for maintenance

Watts 0386421 Regulator Valve Els PW 17895 What is the benefit ofProfessionals in the field recognize the Watts 0386421 (Model TB1156F) as a high capacity industry standard for hydronic heating systems. This 1 2 inch feed water pressure regulator is engineered to maintain consistent system pressure by automatically filling the boiler and piping. It serves as a drop in 0386500 replacement and is the direct successor to the legacy T1156F valve. Designed for rugged commercial and residential use, the Watts 0386421