Watts 0382870 Valve

The Watts 0382870 (also identified as model 740-1-60) is a high-capacity boiler pressure relief valve engineered for heavy-duty hot water space heating applications. This 1" x 1-1/4" NPT valve features a durable iron body construction and is specifically designed to provide emergency overpressure protection for commercial and large-scale residential boilers. With a pressure relief setting of 60 psi and a certified steam discharge capacity of 2,200,000 BTU/hr, it ensures reliable performance under demanding thermal conditions.

Built for veteran technicians who prioritize system longevity, this ASME rated valve incorporates a non-metallic disc-to-metal seating and a stainless steel spring to resist corrosive water conditions and prevent sticking. The expanded outlet design facilitates unrestricted discharge flow, while the unique "above drain" seat placement prevents sediment and mineral buildup from fouling the mechanical seat-to-disc alignment. This unit is strictly intended for emergency safety relief and serves as a critical fail-safe rather than an operating control.

• High BTU Rating: Manages up to 2,200,000 BTU/hr to ensure safe operation in high-output hydronic systems.
• Corrosion Resistance: Iron body and non-metallic seating eliminate typical failures caused by sticking and freezing in aggressive water environments.
• Debris Protection: The seat is positioned above the drain line to keep the orifice clear of pipe scale and sediment.
• Technical Integrity: Includes a test lever for manual verification of waterway clearance during routine inspections.

Common Questions

What is the difference between Watts 0382870 and 740-1-60?
These part numbers refer to the exact same technical specification: a 1-inch Series 740 valve factory-set at 60 psi. They are interchangeable in all HVACR and plumbing applications.

Is this valve suitable for potable water systems?
No, this iron-body pressure relief valve is designed specifically for non-potable hot water heating systems and does not meet low-lead requirements for drinking water.

Can the discharge be piped with 1" tubing?
No. To maintain stated flow capacity, the discharge piping must match the 1-1/4" expanded outlet size and be pitched downward to a safe point of disposal.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.