Watts 0369010 Valve

The Watts 0369010 474A Safety Relief Valve is a 3/4" heavy-duty bronze valve engineered for high-capacity hot water heating boiler protection. This unit is specifically factory set at 125 psi to secure residential and commercial systems against over-pressurization. With a high relief capacity of 1,700,000 BTU/Hr, the Watts 474A ensures rapid discharge when pressure thresholds are exceeded. The internal architecture features an elevated seat design, which prevents water from resting on the seat to minimize mineral build-up and sticking. Its non-mechanical seat-to-disc alignment provides a consistent, bubble-tight seal, while the high-temperature resistant water seal shields the spring components from steam and system contaminants. This valve is the direct equivalent to the 474A-3/4-125 model, offering a drop-in ASME Section IV rated solution for hydronic system safety and long-term service life in demanding mechanical rooms.

Key Benefits for Contractors:

• ASME Rated Capacity: Certified at 1,700,000 BTU/Hr for high-output boilers.
• Corrosion Resistance: Rugged bronze body construction withstands harsh hydronic environments.
• Reliable Reseating: Non-mechanical alignment ensures the disc seats properly after every discharge.
• Spring Protection: Shielded internal parts prevent scale and sediment from affecting relief accuracy.
• Universal Fit: Standard 3/4" NPT threaded connections for quick field replacement and installation.

Common Questions:

Is the Watts 0369010 suitable for potable water heaters?
No, this 474A safety relief valve is specifically designed for hot water space heating boilers. For potable water heaters, use a T&P relief valve rated for both temperature and pressure.

Can I adjust the pressure set point on this valve?
No, this valve is factory set at 125 psi. Safety relief valves should never be field-adjusted to ensure compliance with local mechanical codes and original equipment manufacturer specifications.

What is the difference between the 0369010 and the 474A-3/4-125?
They are identical parts. The 0369010 is the specific Watts ordering code for the 474A valve configured with a 3/4" connection and a 125 psi setting.

?? Safety Notice: This product includes a California Proposition 65 warning.

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.