Watts 0315180 N240X-9 1″ 150# T&P Relief Valve 4,059,000 BTU

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