Step 7 · Install Filter Cartridge and Flush System
Once you've confirmed there are no leaks, close the inlet valve to the filter. Press the red pressure-relief button on top of the filter housing to release any trapped pressure and water. Unscrew the filter sump using the supplied filter wrench. Remove the protective plastic wrapping from the new sediment filter cartridge and insert it into the sump, ensuring it's centered on the standpipe at the bottom. Apply a light coat of food-grade silicone grease to the O-ring to ensure a good seal. Screw the sump back onto the housing and hand-tighten it, then give it a final quarter-turn with the filter wrench. Do not over-tighten. Slowly open the inlet valve. The housing will fill with water. Press the pressure-relief button again until water squirts out to purge any remaining air. Open a nearby faucet and let it run for 5-10 minutes to flush any carbon fines or air from the new filter before using the water elsewhere in the house.