Watts 0066090 Valve

The Watts 0066090 is a heavy-duty 3/4 inch T&P relief valve engineered for critical temperature and pressure protection in water heater and storage tank applications. Built with a rugged bronze body and a stainless steel spring, this Series 100XL valve is designed to handle up to 105,000 BTU/hr. It features a 125 psi pressure setting and a 210°F temperature relief point, ensuring consistent performance in demanding mechanical rooms. The thermo-bonded coating on the extension thermostat prevents mineral buildup, maintaining sensitivity for precise thermal response. Contractors rely on this automatic reseating safety device because it meets ASME Section IV and ANSI Z21.22 standards, providing a reliable 2-in-1 solution for hot water systems. The MNPT inlet and FNPT outlet configuration, combined with a 4-inch probe, allows for seamless integration into standard heater tappings while ensuring the sensing element is positioned accurately within the top 6 inches of the tank.

• Dual-Action Protection: Provides simultaneous relief for both excessive pressure and high-temperature conditions in systems up to 105,000 BTU.
• Corrosion Resistance: High-quality bronze construction and a stainless steel spring ensure longevity in harsh water environments.
• Enhanced Sensitivity: The unique thermostat features a special thermo-bonded coating to resist scaling and maintain calibration.
• Standardized Fit: 3/4" NPT connections and a test lever facilitate easy installation and mandatory code compliance testing.
• Certified Safety: Fully ASME rated and CSA listed, ensuring the part meets strict professional and safety specifications.

• What is the maximum BTU rating for this valve? This 100XL model is rated for water heaters and storage tanks with a heat input of up to 105,000 BTU per hour.
• Can this be used for space heating applications? No, this is a dedicated water heater relief valve designed for domestic hot water storage tanks, not for steam boilers or space heating systems.
• Where should the thermostat probe be located? For accurate temperature sensing, the probe must be immersed in the water within the top 6 inches of the tank.

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.