Air Release Valve

Air Release Valve for Fire-Water Pipeline High Points

An air release valve automatically vents small pockets of accumulated air from a pressurized water pipeline. It is commonly positioned at a high point or another location where air can separate from the water and collect during normal system operation.

Coordinate the installation with AJ Safety Solutions, review associated products in the fire valve category, and consider the connected water supply equipment when planning the complete network.

Automatic Float Operation

Inside the valve, a float mechanism responds to the liquid level. Accumulated air lowers the internal water level and allows the vent to open. As air leaves and water rises, the float returns the vent toward its closed position. The detailed mechanism and venting capacity depend on the selected model.

Key Functional Features

• Automatically releases accumulated air during compatible system operation.
• Uses a float-operated internal mechanism.
• Is typically located where air naturally collects in the pipeline profile.
• Provides a dedicated upward venting path separate from the main water flow.

Typical Applications

Air release valves may be used at riser high points, elevated pipe sections, pump or tank lines, and selected high points in fire-water networks. The vent outlet, drainage around the valve, isolation for servicing, and safe discharge of moisture should be considered in the approved installation detail.

Project Specification Notes

Air release, air-and-vacuum, and combination air valves perform different functions and should not be treated as interchangeable. Orifice size, venting capacity, connection, body material, pressure rating, operating range, and approvals are model-specific. Final selection requires the pipeline profile and manufacturer’s sizing data.

Standards and Maintenance References

Review NFPA 14 for standpipe and hose system context and NFPA 25 for inspection, testing, and maintenance guidance. The adopted code, engineered design, and manufacturer instructions govern the installation.