OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE UNIT

* 567, Filter Housing Wrench for all versions of BIG BLUE Whole House Units, including WH5, WH10, WH20, WH25, WH250, WH1134, WH2201

* This filter housing wrench is designed to fit Whole House system big blue filter housings.

* The wrench gives great convenience and ease when changing the replacement filters. This is especially true when the filter housings are too tight to unscrew them by hand.

* Diameter is approximately 4.5 inch