Description
Conbraco Industries 18C-511-3-150 Temperature & Pressure Relief Valve
The Conbraco Industries 18C-511-3-150 is a heavy-duty Temperature and Pressure (T&P) Relief Valve engineered to provide critical overpressure and overtemperature protection for hot water boilers, water heaters, and hydronic heating systems. With a 3/4″ Male NPT inlet and 3/4″ Female NPT outlet, this valve integrates seamlessly into standard residential and light commercial plumbing configurations. Its factory-set relief point of 150 PSI and 210°F ensures the system is safeguarded against dangerous pressure and temperature excursions before they can cause equipment damage or safety hazards.
Key Features
- 3/4″ Male NPT inlet x 3/4″ Female NPT outlet for easy installation into standard piping
- Factory-set pressure relief at 150 PSI — no field adjustment required
- Factory-set temperature relief at 210°F for precise thermal protection
- High BTU capacity rating of 1,912,000 BTU for robust system coverage
- 3″ probe length ensures accurate immersion sensing in the water heater or boiler vessel
- Automatic pressure and temperature relief in a single, compact valve body
- Durable construction designed for long service life in demanding hydronic applications
Specifications
- SKU: 18C-511-3-150
- Brand: Conbraco Industries
- Inlet Connection: 3/4″ Male NPT
- Outlet Connection: 3/4″ Female NPT
- Set Pressure: 150 PSI
- Set Temperature: 210°F
- BTU Capacity: 1,912,000 BTU/hr
- Probe Length: 3″
- Valve Type: Temperature and Pressure (T&P) Relief Valve
Applications
- Residential and commercial water heaters
- Hot water boilers and hydronic heating systems
- Pressure vessels requiring combined T&P overpressure protection
- Replacement of aging or failed T&P relief valves in existing installations







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