Water Filters made Easy At![]() |
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| If your housing is a Culligan / USFilter / Ametek / Pentek 20" Big Blue Whole House Water Filter System, the SW-4, Pentek SW-4 Big Blue Water Filter Housing Wrench and Culligan SW4 Spanner Wrench 144368, is the correct wrench. Thank you, WaterFilters.NET |
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