Metal Wrench #4

Our #4 steel water filter wrench will be the last wrench you ever need. If you have had trouble getting your housings loose during filter changes or if you have ever broken a plastic wrench, then you need our Galvanized water filter wrench. It will not bend, break, or bow.

Inside Diameter (not from the tabs) - 3.8". Fits most slim line housings.

Not sure what size filter housing wrench you need? Find the correct one on our Choosing the Right Filter Housing Wrench page.

• Pentek SW-1 # 150539
• Aqua Pure Reverse Osmosis
• SW1 Slim Line
• SW-1
• Ametek # 150294
• Whirlpool WHKF-DWH
• Whirlpool WHKF-DUF
• Fits most slimline housings by
  • Culligan
  • Ametek
  • US Filter
  • Plymouth
  • Kleen Plus
  • American Plumber
  • Bruner