Watts 0121452 Valve
The Watts 0121452 is a high-capacity Series 140X automatic reseating temperature and pressure relief valve designed for heavy-duty commercial water heating applications. Engineered for systems requiring high BTU discharge rates, this valve features a 3/4" NPT male inlet and NPT female outlet, rated at 125 PSI with a steam discharge capacity of 1,218,000 BTU/hr. The 5-inch thermostat extension ensures accurate thermal sensing deeper within the tank or water heater, preventing dangerous over-temperature conditions by opening at 210°F (99°C).
For the veteran contractor, the Watts 140X-5-3/4 provides a reliable, non-mechanical seat-to-disc alignment and a lead-free bronze body to meet rigorous code requirements. The inclusion of tamper-resistant bonnet screws and a reinforced test lever allows for secure operation in high-traffic mechanical rooms. This T&P relief valve is essential for protecting domestic hot water supply tanks and heaters from catastrophic failure due to thermal expansion or malfunctioning controls.
Key Benefits- High-capacity steam discharge of 1,218,000 BTU/hr for large commercial heaters.
- Automatic reseating reduces downtime and water loss after emergency relief events.
- 5-inch thermostat probe provides precise temperature monitoring in thick-walled tanks.
- Durably constructed with a lead-free bronze body for safety and compliance.
- Standardized 3/4" NPT connections simplify replacement and retrofitting.
Is the Watts 0121452 compatible with residential water heaters?
While it can be used if the thread size and pressure ratings match, this high-capacity valve is specifically engineered for commercial systems with large BTU inputs where standard residential valves would be undersized.
What is the difference between the 140X and 140S models?
The 140X denotes an extended thermostat model, such as this 5-inch version, whereas the 140S typically refers to the short-thermostat variant. Extension probes are vital for ensuring the sensor is fully immersed in the heating zone.
Why is my relief valve weeping after a 125 PSI discharge?
Weeping is often caused by thermal expansion or sediment buildup on the seat. If the valve fails to seal after manual testing with the lever, the seating surface may be obstructed or damaged, requiring inspection or replacement.
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: $753.60
-65%$753.60
$263.76Watts 0121452 Valve
The Watts 0121452 is a high-capacity Series 140X automatic reseating temperature and pressure relief valve designed for heavy-duty commercial water heating applications. Engineered for systems requiring high BTU discharge rates, this valve features a 3/4" NPT male inlet and NPT female outlet, rated at 125 PSI with a steam discharge capacity of 1,218,000 BTU/hr. The 5-inch thermostat extension ensures accurate thermal sensing deeper within the tank or water heater, preventing dangerous over-temperature conditions by opening at 210°F (99°C).
For the veteran contractor, the Watts 140X-5-3/4 provides a reliable, non-mechanical seat-to-disc alignment and a lead-free bronze body to meet rigorous code requirements. The inclusion of tamper-resistant bonnet screws and a reinforced test lever allows for secure operation in high-traffic mechanical rooms. This T&P relief valve is essential for protecting domestic hot water supply tanks and heaters from catastrophic failure due to thermal expansion or malfunctioning controls.
Key Benefits- High-capacity steam discharge of 1,218,000 BTU/hr for large commercial heaters.
- Automatic reseating reduces downtime and water loss after emergency relief events.
- 5-inch thermostat probe provides precise temperature monitoring in thick-walled tanks.
- Durably constructed with a lead-free bronze body for safety and compliance.
- Standardized 3/4" NPT connections simplify replacement and retrofitting.
Is the Watts 0121452 compatible with residential water heaters?
While it can be used if the thread size and pressure ratings match, this high-capacity valve is specifically engineered for commercial systems with large BTU inputs where standard residential valves would be undersized.
What is the difference between the 140X and 140S models?
The 140X denotes an extended thermostat model, such as this 5-inch version, whereas the 140S typically refers to the short-thermostat variant. Extension probes are vital for ensuring the sensor is fully immersed in the heating zone.
Why is my relief valve weeping after a 125 PSI discharge?
Weeping is often caused by thermal expansion or sediment buildup on the seat. If the valve fails to seal after manual testing with the lever, the seating surface may be obstructed or damaged, requiring inspection or replacement.
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 0121452 is a high-capacity Series 140X automatic reseating temperature and pressure relief valve designed for heavy-duty commercial water heating applications. Engineered for systems requiring high BTU discharge rates, this valve features a 3/4" NPT male inlet and NPT female outlet, rated at 125 PSI with a steam discharge capacity of 1,218,000 BTU/hr. The 5-inch thermostat extension ensures accurate thermal sensing deeper within the tank or water heater, preventing dangerous over-temperature conditions by opening at 210°F (99°C).
For the veteran contractor, the Watts 140X-5-3/4 provides a reliable, non-mechanical seat-to-disc alignment and a lead-free bronze body to meet rigorous code requirements. The inclusion of tamper-resistant bonnet screws and a reinforced test lever allows for secure operation in high-traffic mechanical rooms. This T&P relief valve is essential for protecting domestic hot water supply tanks and heaters from catastrophic failure due to thermal expansion or malfunctioning controls.
Key Benefits- High-capacity steam discharge of 1,218,000 BTU/hr for large commercial heaters.
- Automatic reseating reduces downtime and water loss after emergency relief events.
- 5-inch thermostat probe provides precise temperature monitoring in thick-walled tanks.
- Durably constructed with a lead-free bronze body for safety and compliance.
- Standardized 3/4" NPT connections simplify replacement and retrofitting.
Is the Watts 0121452 compatible with residential water heaters?
While it can be used if the thread size and pressure ratings match, this high-capacity valve is specifically engineered for commercial systems with large BTU inputs where standard residential valves would be undersized.
What is the difference between the 140X and 140S models?
The 140X denotes an extended thermostat model, such as this 5-inch version, whereas the 140S typically refers to the short-thermostat variant. Extension probes are vital for ensuring the sensor is fully immersed in the heating zone.
Why is my relief valve weeping after a 125 PSI discharge?
Weeping is often caused by thermal expansion or sediment buildup on the seat. If the valve fails to seal after manual testing with the lever, the seating surface may be obstructed or damaged, requiring inspection or replacement.
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.
