- How often do I replace the filter?
- Culligan rates the cartridge for about 5 months or 10,000 gallons, whichever comes first. Heavy use in a busy bathroom will hit the gallon limit sooner.
- Will it fit my existing shower arm?
- It mounts on a standard wall shower arm and installs in 10 to 15 minutes with a basic wrench. Check clearance above the tub, since the filter head adds length.
- Does it soften hard water?
- No. It reduces chlorine and sediment but does not remove calcium and magnesium, so it is not a water softener.
- What is the flow rate?
- It runs at 2.5 GPM, the standard rate for most shower heads in the US.
- Is $29.92 a good price?
- That is the best new price among 3 stores as of November 6, 2026, and sits at the low end of its usual range. Factor in the cost of replacement cartridges over the year.
- What is in the box?
- The filter head with a cartridge installed and mounting hardware. You supply the wrench.
- Where is the Culligan WSH-C125 Shower Filter cheapest?
- At AllFilters.com, for $29.92, 40% under what the other stores charge, as of our latest check.
- Where can I buy the Culligan WSH-C125 Shower Filter?
- 3 stores we checked sell it, including The Home Depot, AllFilters.com, big-apple-hardware-and-houseware.