Watts 0556013 Valve

The Watts 0556013 is a heavy-duty 3/4 inch T&P relief valve engineered for high-capacity water heater protection in commercial and residential applications. Known as the updated replacement for the Watts 40L-3-125 and LF40L-125/210-3/4, this valve provides critical over-temperature and over-pressure protection. It features an extended shank for installations with thicker insulation and is rated for a steam discharge capacity of up to 1,217,600 BTU/hr. Utilizing a lead-free copper alloy body and a thermostat with a thermo-bonded coating, it ensures reliable mechanical operation and corrosion resistance. This temperature and pressure relief valve is set to 125 PSI with a temperature relief point of 210°F. When specifying a commercial water heater relief valve, the 0556013 satisfies ASME Section IV requirements and is CSA certified, making it a standard for contractors requiring precise thermal expansion control and system safety.

Key Benefits

• High BTU Rating: Boasts a 1,217,600 BTU/hr capacity, suitable for large-scale commercial storage tanks.
• Extended Shank Design: Simplifies installation on modern water heaters with high-density insulation.
• Accurate Thermal Response: The thermo-bonded probe provides consistent mechanical tripping at 210°F.
• Drop-in Compatibility: Directly replaces discontinued 40L series models without piping modifications.
• Lead-Free Construction: Complies with federal mandates for potable water safety and ANSI Z21.22 standards.

Common Questions

Is the Watts 0556013 compatible with the older 40L-3-125 model?
Yes, the 0556013 is the designated technical successor to the 40L-3-125 and the LF40L versions, maintaining identical 3/4" NPT inlet and outlet dimensions.

What is the relief setting for this specific T&P valve?
This specific model is calibrated for 125 PSI; ensure your system operating pressure does not exceed 80% of this rating to prevent nuisance dripping.

Can this valve be installed horizontally?
While T&P valves function best in the vertical position, they can be installed horizontally provided the thermostat element is fully immersed in the top 6 inches of the water tank.

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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.