Conbraco 18C-522-8-150 Valve

The Conbraco 18C-522-8-150 is a heavy-duty, bronze Temperature and Pressure Relief Valve engineered for high-capacity commercial hot water heaters and storage tanks. Featuring a robust 1" Female NPT inlet and outlet, this valve is factory-set at 150 PSI and 210°F to provide reliable overpressure and thermal protection. With a substantial 3,625,000 BTU capacity, it meets the rigorous demands of large-scale HVACR and plumbing systems. The 8" probe length ensures accurate thermal sensing deep within the tank, preventing dangerous temperature stacking. Built with a corrosion-resistant bronze body and a coated thermal element, this ASME Section IV certified valve is a staple for contractors maintaining commercial water heating systems. Its automatic T&P relief functionality is critical for system safety, ensuring that pressure and temperature limits are never exceeded during peak operation. Whether you are performing a new installation or a critical repair, this valve provides the high-flow performance required for industrial-grade thermal safety.

• High BTU Rating: Manages up to 3,625,000 BTU/hr, making it suitable for large commercial boilers and high-volume storage tanks.
• Precision Sensing: The 8-inch extended probe provides superior temperature monitoring compared to shorter elements in deep-tank applications.
• Dual Protection: Consolidates both temperature and pressure relief into a single, high-capacity 1-inch NPT fitting for simplified piping.
• Rugged Construction: Features a durable bronze body and stainless steel springs to withstand harsh water conditions and resist mineral buildup.
• Code Compliance: ASME Section IV certified and CSA listed, ensuring your installation meets strict municipal and industrial safety standards.

Common Questions

What is the purpose of the 8-inch probe on this valve?
The 8-inch element is designed to reach deeper into the water heater or storage tank. This ensures the valve senses the actual water temperature at the top of the tank more accurately than a shorter probe, which is vital for preventing the tank from reaching a boiling state.

Can this valve be installed in any orientation?
For proper 150 PSI relief operation, these valves should be installed in a vertical position with the test lever at the top. This prevents sediment from settling on the seat and ensures the valve remains self-draining.

Is the discharge piping size restricted?
Yes. You should never install discharge piping that is smaller than the 1" NPT outlet of the valve. Reducing the pipe size creates backpressure, which can significantly reduce the BTU discharge capacity and compromise safety.

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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.