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Gecko Alliance - 9920-400178 - Gecko Spa Light Harness - is a replacement product identified by manufacturer part number 9920-400178
or heater bypass concerns during routine equipment pad service
It is often identified when returns surge with air and the filter will not stabilize normally after startup
leakproof fix for joints and connections
Pentair Filter Hub Assembly, 3" | 154016Z Maytronics Gecko Alliance - 9920-400178 -What This Part Is Used For The Pentair 154016Z Hub Assembly 3in is used within select Pentair sand filter systems to connect and support internal lateral components. It directs water evenly through the filter media during filtration and backwash cycles. Why This Part Matters A cracked or worn hub can cause channeling inside the sand bed, reducing filtration efficiency. It may also allow sand to return to the pool if internal connections fail.