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.

Features:

• For residential & RV use
• Makes replacing water cartridges quick & easy
• Do not use to tighten - may cause damage
• Genuine OEM product

Wrench Used For:

• FH500 Series 5"L (4.28" dia cap x 7.5" overall length)
• FH4000 & FH4200 Series 10" L (4.72" dia cap x 11.8" overall length)
• FH7000 Series 20" L (4.72" dia cap x 22.8" overall length)

Do NOT use to tighten sump, only to loosen.