Watts 0274513 Relief Valve

The Watts 0274513 is a heavy-duty ASME Section IV certified boiler pressure relief valve designed specifically for hot water heating systems and domestic supply boilers. This Watts 174A-3/4-50 model features a 3/4-inch FNPT inlet and outlet with a fixed pressure set point of 50 PSI. Built with a rugged bronze body and a stainless steel spring, it delivers a high discharge capacity of 950,000 BTU/hr to prevent catastrophic equipment failure during overpressure events. The engineered non-mechanical seat-to-disc alignment ensures the valve will not stick or freeze, while the elevated seat design prevents sediment buildup and water trapping. For modern monitoring, this hot water relief valve includes a built-in SentryPlus Alert flood sensor, allowing contractors to integrate discharge detection into a building management system. This 3/4 inch Watts relief valve is the industry standard for reliable, high-capacity pressure protection in commercial and residential hydronic applications.

• High BTU Capacity: Rated for up to 950,000 BTU/hr, providing critical safety for high-output boiler equipment.
• Corrosion Resistance: Durable bronze body construction and stainless steel internal components resist corrosive water conditions.
• Foul-Resistant Design: The seat is positioned above the drain to ensure sediment cannot compromise the seal or trap water.
• Smart Connectivity: Integrated SentryPlus Alert flood sensor enables remote monitoring of discharge events (requires activation kit).
• Reliable Reseating: Features automatic reseating and a manual test lever for routine maintenance and safety verification.

Can I use the Watts 0274513 for potable drinking water systems?
No, this specific model is designed for non-potable hot water heating and boiler applications. It does not meet low-lead standards for human consumption systems.

What happens if the boiler pressure exceeds 50 PSI?
The valve is set at a 50 PSI pressure set point. Once reached, it will automatically open to discharge water or steam at a rate equal to or greater than the boiler's heat input to stabilize the system.

Do I need extra equipment for the flood sensor to work?
Yes, while the sensor is included, you must purchase a separate activation kit to connect it to your building management system or cellular gateway for alerts.

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.