Close both shut off valves. (If you have a by-pass, open the valve in case the dishwasher or
washing machine is on.)

Push in one of the red pressure release buttons on the top while holding a bucket under to
catch the water spraying out.

When you see the pressure drop to zero you can now open the housing.

If the housing was put on too tight this may take some muscle. (putting a cloth over the circle wrench handle will help if you need to push on it with your bodyweight)

With the circle wrench, turn the housing clockwise to open. (so the handle should be on the left and push towards the wall) Keep the bucket under the housing to catch the water once it is ready to come off. You may need to push the pressure release button again just before opening the housing.

When the housing is almost off, water will start to drip down. It is now important to put a hand on the bottom of the housing to stop it from falling.

Place the housing into the bucket and remove the cartridge.

Drain the housing of the old water and wipe the inside with a paper towel.
Lubricate the O-ring and threading with silicone lubrication.

Put in the 5 micron pre-filter and tighten by hand. Once it’s tight, give a one half turn with the circle wrench.

Do the same for the second housing for the carbon block.

Open a cold water faucet that is closest to the system, like the sink in the laundry room.
Open the shut-off valves slowly to fill the tanks, and close the by-pass valve.

Let the water run to waist for at least 5 minutes. If you don’t like wasting water you can use
it for plants.

NOTE: If you have the triple AWF BB for fluoride you must put the fluoride cartridge in the middle housing with the third housing for the carbon block empty. Flush the fluoride cartridge for at least 5 minutes. Then open the carbon block housing to insert the carbon block cartridge. Then flush that cartridge as well for 5 minutes.

(NOTE: You can put the fluoride cartridge in last, but it is important to flush the cartridge in front of it for at least 5 minutes to prevent the last cartridge from clogging up.)