Watts 0383021 Valve Freon the TH109-009 provides the heavy-duty

the TH109-009 provides the heavy-duty reliability required for mission-critical environmental control without the complexity of digital interfaces

Probes are sold separately to allow for custom length selection based on tank depth

verify the specific PSI rating of your system before installation

boiler reservoirs

Watts 0383021 Valve Freon the TH109-009 provides the heavy-dutyThe Watts 0383021 is a high capacity ASME Section IV safety relief valve designed specifically for commercial hot water space heating boilers. This Watts 740 series relief valve features a 1 1 4 inch NPT female inlet and an expanded 1 1 2 inch NPT female outlet, engineered to decrease discharge velocity and prevent potential backpressure issues within the return line. With a factory set relief pressure of 35 PSI and a certified steam discharge