Description
The Watts F358553 is a 3/4″ relief valve factory-set to open at 30 PSI, providing dependable overpressure protection for hydronic heating systems, boilers, water heaters, and plumbing applications. Engineered to Watts’ exacting standards, this relief valve automatically releases excess pressure to safeguard system components, piping, and equipment from damage caused by pressure surges or buildup.
Key Features
- Factory-set relief pressure: 30 PSI
- 3/4″ connection size for straightforward installation
- Automatic pressure relief to protect system integrity
- Durable construction built to Watts quality standards
- Suitable for hydronic heating, boiler, and plumbing system applications
- Compact design for easy integration into existing piping layouts
Applications
- Hydronic heating and hot water systems
- Residential and light commercial boilers
- Domestic water heater installations
- Closed-loop plumbing systems requiring overpressure protection
Why Choose Watts
Watts is a globally recognized leader in flow control and water quality products. The F358553 relief valve reflects the brand’s commitment to safety, reliability, and long service life — making it a trusted choice for HVAC and plumbing professionals.







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