Pentair 170028 Air Bleed Assembly - 420 CNC Plus, 170028

What This Part Is Used For
The Pentair 170028 Air Bleed Assembly is used on compatible 420 CNC Plus filters to vent trapped air from the tank. It supports safe and consistent system pressurization.

Why This Part Matters
Air inside the tank can reduce filtration efficiency and cause inaccurate pressure readings. A damaged Assembly may leak under pressure. Replacing the air bleed restores dependable filter operation.

Key Features and Specifications

• Pentair manufacturer part number: 170028
• Air bleed Assembly
• For 420 CNC Plus filters
• Manual air release function
• Replacement filter component

Installation and Fitment Guidance
Shut off pump and relieve pressure before servicing. Inspect O-rings and sealing surfaces during installation. Confirm by manufacturer part number before ordering.

About the Pentair Brand
Pentair CNC Plus filters are used in high-capacity residential and commercial systems. Their air relief components are built for direct fit and compatibility. Pentair replacement parts help maintain safe filtration.

Common Service Context
Air bleed assemblies are often replaced during filter rebuilds or when leaks develop at the tank top. They are commonly serviced during annual cleanings.