The SW-BigOlder Spanner Wrench is designed specifically for older 10-inch Big/Jumbo white water filter housings featuring 4 ribs with two channels within each rib (W-shaped channels within each rib).
This filter housing wrench provides extra leverage to help loosen a stuck or difficult-to-open filter housing sump, making routine water filter replacement faster and easier. on OLDER 10 inch Big/Jumbo White Housings.
See second picture for illustration of filter housing that this works on.
IMPORTANT: Please check your filter housing carefully before ordering.
This wrench is designed for the older-style Big/Jumbo white housings shown in the product images and may not fit newer housing designs.
Features and Benefits:
- Designed for older 10″ Big/Jumbo white filter housings
- Suitable for housings with 4 ribs and W-shaped channels within each rib
- Provides additional leverage for loosening a tight filter housing
- Makes water filter cartridge replacement quicker and easier
- Ideal for servicing difficult-to-open filter housings
- Durable and practical tool for regular filter maintenance
Important: Do Not Use to Tighten
The filter housing spanner is designed ONLY to loosen the filter housing sump.
Do not use the wrench to tighten the housing. Filter housings should generally be tightened by hand according to the housing manufacturer’s instructions.
Over-tightening can damage the O-ring and may make the housing more difficult to open during the next filter change.
Product Details
Product: Filter Housing Spanner Wrench
Model: SW-BigOlder
Application: Older 10″ Big/Jumbo white filter housings
Housing Type: 4-rib design with W-shaped channels within each rib
Use: Loosening filter housing sumps for filter replacement



