Description
The Watts N240X-9 (SKU 0315180) is a heavy-duty Temperature and Pressure (T&P) Relief Valve engineered to provide critical safety protection for boilers, water heaters, and hydronic heating systems. With a 1-inch connection size, a 150 PSI pressure rating, and an impressive 4,059,000 BTU/hr discharge capacity, this valve is built to handle demanding commercial and industrial applications where reliable overpressure protection is non-negotiable.
Watts is a globally recognized leader in flow control and water quality products, and the N240X-9 series continues that tradition of engineering excellence. When system pressure or temperature exceeds safe operating limits, this valve automatically opens to relieve excess energy — protecting equipment, property, and personnel from catastrophic failure.
Key Features
- 1″ NPT connection for straightforward installation into standard piping systems
- 150 PSI pressure rating for robust overpressure protection
- 4,059,000 BTU/hr discharge capacity suitable for high-output commercial systems
- Dual Temperature & Pressure (T&P) sensing for comprehensive safety coverage
- Watts N240X-9 series design — trusted for reliability in boiler and water heater applications
- Durable construction for long service life in demanding hydronic and steam environments
Specifications
- Brand: Watts
- Model: N240X-9
- SKU: 0315180
- Connection Size: 1″
- Pressure Rating: 150 PSI
- BTU Capacity: 4,059,000 BTU/hr
- Valve Type: Temperature & Pressure (T&P) Relief Valve
Applications
- Commercial and industrial boilers
- Large-capacity water heaters
- Hydronic heating systems
- Steam and hot water distribution systems







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