Air trapped inside a pool filter can cause inaccurate pressure readings, reduced circulation, noisy operation, and unnecessary stress on equipment. The Pentair Air Bleed Replacement Kit (WC8-126Z) is a genuine OEM service kit designed to restore proper air relief function in compatible Pentair pool filter systems, allowing trapped air to escape safely and efficiently.

Over time, air relief assemblies wear out due to constant pressure changes, chemical exposure, and debris buildup. Seals harden, springs weaken, and internal components lose their ability to vent air correctly. When this happens, air becomes trapped at the top of the filter tank, reducing effective filtration and increasing the risk of improper startup after maintenance. Replacing worn air bleed components restores normal pressure balance and reliable system operation.

At Benchmark Pool Supply, this kit is commonly recommended when customers report air buildup, fluctuating pressure gauges, or difficulty purging air after cleaning or servicing a filter.

Why Proper Air Relief Is Critical for Filter Performance

Pool filters are designed to operate full of water, not air. Trapped air reduces the effective filtration area, disrupts flow, and can cause the pressure gauge to give misleading readings. In severe cases, trapped air can contribute to unsafe operating conditions during startup.

The Pentair WC8-126Z air bleed replacement kit ensures that air is released quickly during system startup and normal operation, helping the filter reach proper working pressure and maintain consistent circulation.

OEM Components for Correct Sealing and Venting

This replacement kit includes OEM-grade components manufactured to Pentair specifications for fit, material quality, and durability. Proper tolerances are critical for air relief assemblies—components must seal tightly under pressure while still venting air when needed.

Aftermarket parts may not vent consistently or may fail prematurely. Using a genuine Pentair kit ensures reliable air release and long-term performance.

Common Applications and Use Cases

The Pentair WC8-126Z air bleed kit is typically used during:

• Filter servicing or internal cleaning

• Pressure gauge replacement

• Startup issues involving trapped air

• Preventative maintenance on aging filter systems

• Repair of leaking or non-functioning air relief valves

Replacing the air bleed components can often resolve startup and circulation issues without requiring full valve or filter replacement.

Installation and Service Considerations

Installation of the Pentair air bleed replacement kit is straightforward and can usually be completed during routine filter service. The system should be shut down and depressurized before replacement.

Once installed, the filter should be restarted and observed to confirm that trapped air is released smoothly and pressure stabilizes at normal operating levels.

Product Specifications

Buy with Confidence from Benchmark Pool Supply

When you purchase the Pentair Air Bleed Replacement Kit (WC8-126Z) from Benchmark Pool Supply, you’re buying a genuine OEM service component from a pool supply company that understands proper filtration operation and safe startup procedures. We stock authentic Pentair parts, verify compatibility, and stand behind what we sell. Whether you’re performing routine maintenance or resolving air-related issues, you can trust you’re getting the correct kit backed by real expertise.