How to Replace Pre-filters in an RO Water Filter

Using a plastic wrench to tighten the filter housing onto the filter unit.

Step-by-step directions for replacing the pre-filter cartridges inside of a multi-stage RO water filter. In This Article: 1: Prepare the system for cartridge replacement 2: Open the housing 3: Replace the filter cartridges 4: Secure the housings 5: Restore water flow and relieve pressure 6: Adjust the tank and faucet settings 7: Inspect for leaks […]