Pentair Air Bleed Assembly, for 420 CNC Plus | 170028 Waterco 25" ID hoses commonly used

25" ID hoses commonly used in CMP systems

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Pentair Air Bleed Assembly, for 420 CNC Plus | 170028 Waterco 25" ID hoses commonly usedWhat 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