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and this Harwil D1 Q10N version is a 0
This American/Pentair Multiport Valve Spring (271161) is engineered for fittings & valves: valve kits & parts applications
Using the proper version is what helps preserve the original sensing relationship rather than introducing a part that only partly fits the application
In these systems
Pentair Challenger Waterfall Pump Basket (355318Z) switches and this Harwil D1 Q10NThe Pentair 355318Z Challenger waterfall pump basket is designed for compatible Challenger waterfall pump applications where the strainer basket needs replacement. A basket like this is useful because it helps catch larger debris before it can reach deeper pump components, supporting easier upkeep and better internal protection. Replacement is often needed when the original basket becomes cracked, weakened, warped, or missing. Installing the correct