3/4" Brass Pressure Relief Valve for Pump, Lead-Free, Male x Female

3/4-Inch Nonadjustable Brass Relief Valve – Fixed 75 PSI for Thermal Expansion & Bypass Protection

This 3/4" nonadjustable relief valve is engineered to provide critical overpressure protection in hydronic, potable, and process water systems. With a factory-set relief point of 75 PSI, it offers consistent and reliable performance in applications where pressure spikes may result from thermal expansion or system imbalances.

Built from low-lead brass to meet potable water regulations, this valve is a dependable component for commercial and residential systems requiring fixed pressure protection. It features an FNPT x MNPT configuration for straightforward installation into new or retrofit piping layouts.

Key Features & Benefits

• Factory-Set at 75 PSI – Delivers dependable relief performance without requiring field adjustments.
• Low-Lead Brass Body – Constructed to comply with federal and state lead content requirements for potable water applications.
• FNPT x MNPT Ends – Versatile connection for seamless integration into standard system layouts.
• Corrosion-Resistant Internals – Engineered for long-term durability in water systems exposed to varying temperatures and flow rates.

Technical Specifications

• Nominal Size: 3/4"
• Pressure Relief Setting: 75 PSI
• Material: Low-lead brass
• End Connection: FNPT inlet x MNPT outlet
• Application: Thermal expansion relief and bypass

Installation Guidance

Although the relief valve installs easily into threaded fittings, professional installation is recommended to ensure code compliance and proper system protection. Always install with the outlet directed to a drain line or safe discharge area per local code. Use appropriate thread sealants and inspect for leaks after pressurization.

Application Suitability

• Thermal expansion protection on water heaters
• Relief valve in closed-loop hydronic systems
• Bypass valve for pump or heat exchanger protection

Why Professionals Choose This Valve

This nonadjustable relief valve is selected for its consistency, simplicity, and code-compliant design. It’s a go-to solution on jobs where reliable overpressure control is needed without the risk of field tampering or drift in setpoints. With rugged brass construction and a fixed 75 PSI rating, it provides peace of mind in both new construction and maintenance work.