1. Turn off water supply to reverse osmosis unit.
2. Turn off valve on storage tank.
3. Open reverse osmosis faucet at sink to relieve pressure.
4. Using the filter wrench (supplied) turn the filter housing clockwise.
5. Remove old filter and replace with a new filter.
6. Apply a small amount of silicone on O-ring.
7. Replace filter housing turn counter clockwise.
8. Turn on valve on storage tank and turn water supply back on.