Watts 0275600 Valve

The Watts 0275600 (also identified as model 275600) is a high-capacity 174A-1 1/4"-30# boiler pressure relief valve engineered for critical overpressure protection in large-scale hydronic heating and domestic supply systems. This ASME Section IV rated safety valve features a rugged bronze body construction with 1-1/4" NPT female inlet and outlet connections. It is factory set to discharge at 30 PSI with a massive certified steam relief capacity of 1,682,000 BTU/hr. Designed specifically for HVAC professionals, the Watts 174A series utilizes a non-metallic disc-to-metal seat and a stainless steel spring to resist corrosive water conditions and prevent seat sticking or freezing. A unique water seal of high-temperature resisting material isolates the internal spring from the fluid during relief cycles, ensuring consistent performance and preventing sediment accumulation that could foul the seat. This valve is a direct replacement for hot water heating supply boiler equipment requiring reliable emergency safety relief.

Key Benefits

• Mechanical Reliability: Non-mechanical seat-to-disc alignment prevents internal components from sticking or freezing even in stagnant systems.
• Sediment Protection: The seat is strategically located above the drain area, ensuring that water and sediment cannot be trapped or foul the seal.
• Corrosion Resistance: Heavy-duty bronze body and stainless steel spring provide long-term durability in high-temperature hydronic applications up to 250°F.
• High Discharge Capacity: Rated for 1,682,000 BTU/hr to handle the large-scale safety requirements of commercial boiler pressure vessels.
• Fail-Safe Design: Features an integrated test lever for manual performance verification and automatic reseating after an overpressure event.

Common Questions

What is the difference between Watts 0275600 and 275600?
These part numbers are identical and refer to the same 1-1/4 inch 30 PSI pressure relief valve.

Can this valve be used for potable water applications?
No, this specific model is intended for non-potable hot water heating and boiler applications. For lead-free potable water requirements, consult the Watts LF174A series.

How should the discharge line be installed for the 174A-1 series?
The discharge line must be the same size as the 1-1/4" NPT outlet, pitched downward to a safe drainage point to prevent water entrapment.

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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.