3/4" Brass Vacuum Relief Valve, Lead-Free, Male x Female

3/4" Lead-Free Brass Vacuum Relief Valve – Dependable Air Inlet Protection

The 3/4" Lead-Free Brass Vacuum Relief Valve is engineered to provide critical protection for water heaters, storage tanks, and related systems by preventing vacuum conditions that can cause system damage or siphon backflow. This valve automatically opens to allow atmospheric air into the piping system when negative pressure is detected, helping maintain safe and efficient system operation.

Constructed from corrosion-resistant lead-free brass, this valve is built for performance in residential and light commercial applications involving low-pressure water and steam service. Its compact form factor and straightforward threaded connection make it a versatile solution for maintaining equipment integrity and meeting code requirements.

Core Features

• Lead-Free Brass Body – Certified to NSF 372 for potable water applications
• Automatic Air Inlet Operation – Opens on vacuum, closes when pressure is equalized
• Thermal Endurance – Rated up to 250°F for hot water service
• Wide Compatibility – Ideal for water heaters, storage tanks, and low-pressure steam systems
• Protective Cap Included – Shields the air inlet port from debris during storage or handling

Technical Data

• Connection Size: 3/4" Male NPT
• Maximum Working Pressure: 15 PSI
• Temperature Limit: 250°F
• Air Inlet Flow Rate: 15 CFM
• Valve Dimensions: 2" H x 2" W (approximate)

Installation Guidance

This valve must be installed vertically on the cold water supply line or system branch where vacuum relief is required. Ensure accessibility for inspection and service. Use appropriate thread sealant on male threads and torque carefully to avoid overtightening. It is recommended that installation be completed by a licensed contractor to ensure system compliance and optimal performance.

Professional Considerations

For Contractors: This vacuum relief valve is a reliable component for systems requiring code-compliant vacuum protection. Its corrosion-resistant brass construction, ease of installation, and consistent air inlet operation make it a smart choice for job sites prioritizing durability and compliance.

For Informed Installers: While simple in function, proper placement and orientation are essential. For best results, follow manufacturer guidelines and confirm compatibility with system pressure ratings and temperature requirements.

Ensure Safe Operation

Prevent system damage caused by vacuum conditions with the 3/4" Lead-Free Brass Vacuum Relief Valve. Whether you're installing new equipment or retrofitting an existing system, this valve delivers the protection required to maintain pressure balance and equipment integrity.