Filter Wrench



The Watts Flowmatic WR100 Filter Wrench makes changing water filters in your residence or RV easy. Use this wrench to loosen the bottom of the housing during cartridge replacement, hassle-free. Simply slide the wrench over the housing until it fits snugly, then use to unscrew the housing body from the cap.


  • For residential & RV use
  • Fits Flowmatic 10" FH4200BB/BL/CW housings
  • Fits Flowmatic 20" FH7000BL/WW housings
  • Makes replacing water cartridges quick & easy
  • Do not use to tighten - may cause damage
  • Genuine OEM product
Do NOT use to tighten sump, only to loosen.