Watts 0121342 Valve

The Watts 0121342 Valve, specifically the 100XL-3-125, is a high-performance temperature and pressure relief valve designed specifically for hot water heaters and storage tanks. This model is technically identical to the LF100XL-125-3/4 and features a lead-free copper alloy body for robust durability in demanding commercial and residential environments. With a 3/4-inch NPT male inlet and 3/4-inch NPT female outlet, this valve is engineered to provide fully automatic protection against hazardous conditions. It is ASME rated and CSA listed, ensuring it meets strict safety codes for potable water systems. The integrated temperature sensing element is designed for immersion in the hottest water within the top six inches of the tank, triggering at 210°F. Simultaneously, the pressure relief setting is factory-calibrated to 125 psi, providing a discharge capacity of up to 100,000 BTU/hr. The inclusion of a test lever allows for routine manual operation checks, while the thermo-bonded coating on the thermostat probe resists mineral accumulation and corrosion.

• Automatic Protection: Delivers self-closing 2-in-1 protection against both over-temperature and over-pressure incidents.
• Lead-Free Construction: The lead-free copper alloy body facilitates compliance with strict safe drinking water standards.
• Corrosion Resistance: Features a stainless steel spring and a thermo-bonded thermostat to prevent scale buildup and extend service life.
• Certified Safety: Fully ASME Section IV and ANSI Z21.22 certified for reliable HVAC safety relief in hot water tanks.

• What water heaters are compatible with the 100XL-3-125? This valve handles inputs up to 100,000 BTU/hr; always confirm your heater's BTU rating does not exceed the valve's capacity.
• Can I use this for a tank with 2-inch insulation? This model is suitable for standard insulation; for extra-thick insulation, consider the extended shank variants of the LF100XL series.
• Is the 0121342 interchangeable with the LF100XL-3/4? Yes, the Watts 0121342 is the manufacturer's ordering code for the 3/4-inch, 125 psi lead-free model.

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.