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Pondmaster Clearguard Pressure Filters offer greater capacity for larger sized ponds.The Clearguard 16000 is for ponds up to 16000 gallons and will accommodate pumps up to 9000GPH. This item comes with 3" connections. 15PSI #05640
Uses Clearguard Backwash Air Kit 15670 for maximum performance.
If you already have an AP-60 then pondmasterservice.com has the conversion kit to utilize it as the backwash air pump.