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inspect the standpipe and lateral assembly beneath it for cracks or sediment buildup
A damaged or deteriorated closure — or a worn O-ring — can result in leaks at the tank head
Consult the exploded diagram in your Challenger installation manual to confirm the correct part for your specific build
replace the full hub assembly rather than individual laterals to avoid a repeat teardown
Pentair Knob Only | Hardware | 071136Z C9475 inspect the standpipe and lateralThe Pentair Knob Only (071136Z) is the OEM replacement hardware knob for compatible Pentair pool and spa equipment. This knob provides hand tightening and hand release function without tools. When the original knob cracks, strips, or breaks, replacing it restores proper operation. Match the part number on your existing knob before ordering to confirm this is the correct replacement for your unit. Specifications Pentair Part Number 071136Z Part Name
