The Culligan SW-3A housing wrench fits the HD-950A heavy-duty housing. The wrench is designed to loosen the bottom of the filter housing during cartridge replacement._x000d_ _x000d_ Culligan SW-3A is a wrench used to loosen bottom of housing during cartridge replacement. _x000d_ Makes changing water filters easy. _x000d_ Use with Culligan HD-950A _x000d_ Package includes: SW-3A _x000d_ .
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