3/4" Pressure Relief Valve

WATTS 3/4" Pressure Relief Valve – Reliable Overpressure Protection for Hydronic Systems

The WATTS 3/4" Pressure Relief Valve is engineered to provide dependable protection for hot water heating systems by releasing excess pressure and helping to maintain system integrity. This valve is factory set to open at 50 psi, making it ideal for residential and light commercial boiler applications that require ASME-rated safety valves.

Built with a corrosion-resistant brass body and precision components, this valve is a trusted solution for preventing damage caused by thermal expansion or equipment malfunction. It’s a compact, dependable safeguard that meets industry safety codes and performance expectations.

Product Highlights

• Brass Construction – Provides excellent corrosion resistance and durability for long-term use in closed-loop systems
• Factory Set Pressure: 50 psi – Designed to discharge when pressure exceeds safe limits
• High-Temperature Resilience – Built for use with hot water up to 250°F
• Top-Mounted Test Lever – Facilitates regular testing and code compliance verification
• Compact, Vertical Discharge Design – Fits into tight boiler room installations with minimal clearance requirements

Specifications

• Size: 3/4" FNPT inlet and outlet
• Set Pressure: 50 psi
• Temperature Rating: Up to 250°F
• Body Material: Brass
• Application: Hot water heating systems
• Certification: ASME Section IV and ANSI Z21.22 compliant

Installation Guidance

This relief valve is intended for vertical installation directly on the boiler supply outlet or nearby tapping. The discharge must be piped to a safe location, in accordance with local codes. Due to the safety-critical nature of pressure relief devices, installation should be performed by a licensed professional to ensure proper function and system protection.

Professional-Grade Reliability

For Contractors: The WATTS 3/4" Pressure Relief Valve provides consistent, code-compliant performance in pressure management. Its ease of testing and rugged design help ensure long-term reliability and simplify routine maintenance checks.

For System Designers: This valve is a proven choice for hydronic boiler packages requiring pressure control under 60 psi. It integrates seamlessly with a variety of hot water heating configurations.

Built to Protect, Built to Last

Backed by decades of industry use and third-party certification, the WATTS 3/4" Pressure Relief Valve remains a trusted component for protecting hydronic systems against overpressure conditions. Its compact design, robust construction, and proven performance make it a standard in residential and light commercial installations.