Watts 0004434 Valve

The Watts 0004434, also identified as the 1XL-4-125, is a high-performance 1/2 inch T&P relief valve engineered for critical temperature and pressure protection in water heating systems. Designed specifically for hot water storage tanks and heaters with ratings up to 15,000 BTU/hr, this bronze body relief valve features a 4-inch extension thermostat with a specialized thermo-bonded coating to resist mineral buildup and ensure consistent thermal response. Operating with a pressure setting of 125 psi and a temperature relief point of 210°F, it serves as a reliable safety backup for domestic applications. This model utilizes a 1/2" NPT male inlet and a 1/2" NPT female outlet, facilitating a secure fit for standard piping configurations. As a veteran-preferred ASME rated and CSA listed safety device, the Watts 1XL-4-125 delivers the automatic reseating and precision required by professional contractors for maintaining water heater safety and compliance with local plumbing codes.

• Dual-Protection Safety: Provides simultaneous temperature and pressure relief to prevent catastrophic tank failure.
• Corrosion Resistant: Built with a solid bronze body construction and a stainless steel spring for long-term durability in potable water systems.
• Anti-Scaling Thermostat: Features a thermo-bonded coating on the probe to minimize lime and calcium accumulation, ensuring accurate sensing.
• Industry Compliance: Fully CSA listed and ASME rated, meeting stringent safety standards for 15,000 BTU/hr heating equipment.
• Automatic Reseating: Engineered for self-closing operation after a relief event, reducing water waste once safe levels are restored.

What is the difference between the 1XL and the 100XL series?
The Series 1XL is specifically sized for 1/2 inch connections and lower BTU applications (up to 15,000 BTU/hr), whereas the 100XL typically fits 3/4 inch connections and supports significantly higher BTU ratings. Always verify the input rating of your heater before installation.

Can I install this valve on a lead-free system?
The Watts 0004434 is a standard bronze model. If your local jurisdiction requires Lead Free compliance for potable water under the Safe Drinking Water Act (SDWA), you should specify the LF1XL-4-125 equivalent.

When should this T&P relief valve be replaced?
Technicians recommend inspecting the test lever annually to ensure the waterway is clear. If the valve exhibits persistent "weeping" due to thermal expansion or shows signs of heavy mineral scale on the extension thermostat, replacement is necessary to maintain system integrity.

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.