This replacement cartridge installs quickly and easily. See "usage" tab below for instructions.

1. Open the HO shower filter by unscrewing the housing halves.
2. Remove the used HOC filter cartridge.
3. Remove and clean the o-ring(s) seated inside each housing half.
4. Apply a thin film of "Vaseline-type" lubricant and replace the o-ring(s) into the o-ring groove inside each housing half.
5. Install the new HOC filter cartridge.
6. Close the HO filter housing by screwing the housing halves together.
7. Flush with hot water for 1 minute before using.