Description
The Watts F383308 is a 1-1/4″ Series 740 iron boiler pressure relief valve engineered to protect hydronic heating systems from dangerous overpressure conditions. Factory-set at 45 PSI, this valve automatically opens to release excess pressure, safeguarding your boiler and connected piping from damage or failure.
Designed for professional HVAC and plumbing installations, the F383308 features expanded outlets for improved discharge flow capacity, reducing back-pressure during relief events. A discharge line flood sensor is included, providing an added layer of protection by detecting water at the discharge outlet — alerting installers or building owners to relief valve activation before a flooding event can cause property damage.
Key Features
- 1-1/4″ inlet connection for straightforward integration into standard boiler piping
- Factory-set relief pressure of 45 PSI for consistent, reliable overpressure protection
- Series 740 iron body construction for durability in hydronic heating applications
- Expanded outlets for enhanced discharge flow and reduced back-pressure
- Discharge line flood sensor included — detects water at the relief outlet for early leak/activation alerts
- Designed for hot water boiler and hydronic heating system installations
Specifications
- Brand: Watts
- Model / SKU: F383308
- Series: 740
- Inlet Size: 1-1/4″
- Set Pressure: 45 PSI
- Body Material: Iron
- Outlets: Expanded
- Includes: Discharge Line Flood Sensor
Application
The Watts F383308 is ideal for use on residential and light commercial hot water boilers where a reliable, code-compliant pressure relief valve is required. The integrated flood sensor makes it especially well-suited for installations where discharge line monitoring is critical to preventing water damage — such as finished basements, mechanical rooms, or anywhere undetected boiler relief could cause costly property damage.
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