Watts 0156731 Valve
The Watts 0156731, specifically the 40XL-5-150, is a high-capacity T&P relief valve engineered for heavy-duty protection of water heaters and storage tanks. Featuring a 3/4 inch NPT inlet and outlet, this temperature and pressure relief valve is factory set at 150 PSI with a maximum temperature threshold of 210°F. The 40XL series is built with a bronze body and features an extended thermostat probe to ensure accurate thermal sensing in the top 6 inches of the tank. With a certified CSA discharge capacity of 1,437,600 BTU/hr, this valve is essential for preventing catastrophic tank failure due to overheating or over-pressurization. It meets ANSI Z21.22 and ASME Section IV requirements, providing a reliable safety interface for commercial and large-scale residential potable water systems. The all-bronze construction and stainless steel spring ensure long-term durability against corrosive water conditions and mineral buildup.
Key Benefits for Technicians:
- High BTU Rating: Rated for systems up to 1,437,600 BTU/hr, making it suitable for high-output commercial water heaters.
- Extended Probe: The 5-inch 40XL thermostat ensures the sensing element is positioned correctly to detect the hottest water at the top of the vessel.
- Corrosion Resistance: Lead-free bronze body and stainless steel internal components prevent scale accumulation and seat sticking.
- Code Compliance: Meets strict ASME and CSA standards for safety-critical pressure vessel applications.
Common Questions:
How do I determine if the 5-inch probe is necessary for my installation?
The extended 5-inch probe on the Watts 40XL-5-150 is required when the tank tapping is located behind insulation or within a fitting that requires additional reach to place the thermal element into the top 6 inches of the tank water.
Is this valve suitable for steam heating systems?
No, this is a temperature and pressure relief valve designed specifically for potable water heaters and hot water storage tanks, not for dedicated steam boiler applications.
What is the difference between the 40XL and the standard 40L?
The 40XL features an extended shank and probe design, whereas the 40L has a standard-length shank; both offer the same high-capacity thermal expansion protection.
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.
Original: $781.90
-65%$781.90
$273.66Watts 0156731 Valve
The Watts 0156731, specifically the 40XL-5-150, is a high-capacity T&P relief valve engineered for heavy-duty protection of water heaters and storage tanks. Featuring a 3/4 inch NPT inlet and outlet, this temperature and pressure relief valve is factory set at 150 PSI with a maximum temperature threshold of 210°F. The 40XL series is built with a bronze body and features an extended thermostat probe to ensure accurate thermal sensing in the top 6 inches of the tank. With a certified CSA discharge capacity of 1,437,600 BTU/hr, this valve is essential for preventing catastrophic tank failure due to overheating or over-pressurization. It meets ANSI Z21.22 and ASME Section IV requirements, providing a reliable safety interface for commercial and large-scale residential potable water systems. The all-bronze construction and stainless steel spring ensure long-term durability against corrosive water conditions and mineral buildup.
Key Benefits for Technicians:
- High BTU Rating: Rated for systems up to 1,437,600 BTU/hr, making it suitable for high-output commercial water heaters.
- Extended Probe: The 5-inch 40XL thermostat ensures the sensing element is positioned correctly to detect the hottest water at the top of the vessel.
- Corrosion Resistance: Lead-free bronze body and stainless steel internal components prevent scale accumulation and seat sticking.
- Code Compliance: Meets strict ASME and CSA standards for safety-critical pressure vessel applications.
Common Questions:
How do I determine if the 5-inch probe is necessary for my installation?
The extended 5-inch probe on the Watts 40XL-5-150 is required when the tank tapping is located behind insulation or within a fitting that requires additional reach to place the thermal element into the top 6 inches of the tank water.
Is this valve suitable for steam heating systems?
No, this is a temperature and pressure relief valve designed specifically for potable water heaters and hot water storage tanks, not for dedicated steam boiler applications.
What is the difference between the 40XL and the standard 40L?
The 40XL features an extended shank and probe design, whereas the 40L has a standard-length shank; both offer the same high-capacity thermal expansion protection.
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.
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Description
The Watts 0156731, specifically the 40XL-5-150, is a high-capacity T&P relief valve engineered for heavy-duty protection of water heaters and storage tanks. Featuring a 3/4 inch NPT inlet and outlet, this temperature and pressure relief valve is factory set at 150 PSI with a maximum temperature threshold of 210°F. The 40XL series is built with a bronze body and features an extended thermostat probe to ensure accurate thermal sensing in the top 6 inches of the tank. With a certified CSA discharge capacity of 1,437,600 BTU/hr, this valve is essential for preventing catastrophic tank failure due to overheating or over-pressurization. It meets ANSI Z21.22 and ASME Section IV requirements, providing a reliable safety interface for commercial and large-scale residential potable water systems. The all-bronze construction and stainless steel spring ensure long-term durability against corrosive water conditions and mineral buildup.
Key Benefits for Technicians:
- High BTU Rating: Rated for systems up to 1,437,600 BTU/hr, making it suitable for high-output commercial water heaters.
- Extended Probe: The 5-inch 40XL thermostat ensures the sensing element is positioned correctly to detect the hottest water at the top of the vessel.
- Corrosion Resistance: Lead-free bronze body and stainless steel internal components prevent scale accumulation and seat sticking.
- Code Compliance: Meets strict ASME and CSA standards for safety-critical pressure vessel applications.
Common Questions:
How do I determine if the 5-inch probe is necessary for my installation?
The extended 5-inch probe on the Watts 40XL-5-150 is required when the tank tapping is located behind insulation or within a fitting that requires additional reach to place the thermal element into the top 6 inches of the tank water.
Is this valve suitable for steam heating systems?
No, this is a temperature and pressure relief valve designed specifically for potable water heaters and hot water storage tanks, not for dedicated steam boiler applications.
What is the difference between the 40XL and the standard 40L?
The 40XL features an extended shank and probe design, whereas the 40L has a standard-length shank; both offer the same high-capacity thermal expansion protection.
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.
