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3MAPPM Aeration Tank Maintenance (MAXAPRT)
The following components that make up the “MAXAPRT” aeration tank will require maintenance from time to time.
Air Release Valve (AR1). This is the air release device that controls the amount of air that is retained in the aeration tank. We recommend cleaning this air
release valve at least once every six (6) months to help prevent plugging of the dip tube. To perform this task:
1. Close the air release valve by turning the upper body so the dot on the lower side of the body lines up with the line on the brass base.
2. While holding the body, grasp the serrated top and turn counter clockwise. Completely remove the top from the body.
3. Next slowly open the upper body of the air release valve to allow water and air to be discharged out the top of the upper body. Slowly turn the upper
body toward the raised dot to allow full flow to clear the dip tube of iron and possibly bio mass.
4. After about a minute of allowing air and water to be purged, close the upper body to the closed position and replace the cap by turning clockwise.
5. Then open the upper body again to allow air to be release externally as needed by turning the upper body so the circle lines up with the line on the
brass base of the AR1 (Figure 11).
Air Release Tank Check Valve
The ¼” poly tube that runs from the air compressor to the aeration tank is connected to a check valve to prevent water from migrating back to the air com-
pressor. Over a period of time, rust or iron can build up and cause the check valve to stick open allowing for water to migrate into the poly tubing causing
problems with the air compressor. To prevent this from occurring we recommend changing the check valve once a year. To change out the check valve part
number MAX-6: (Figure 12)
1. Shut off the water to the water treatment system and depressurize the water treatment system by opening a faucet down stream.
2. Using a tubing removal tool, depress the dark grey ferrule on top of the aeration tank and pull straight up on the tubing to remove it from the fitting.
3. Using a crescent wrench or similar tool, remove the existing check valve and discard.
4. Replace with a new check valve that has had the threads wrapped with thread tape and screw into the aeration tank. Screw hand tight into the
vessel by hand and then an additional 1 & ½ turns. Do not over tighten as damage to the housing is possible.
5. Take the ¼” poly tubing used earlier and push into the new check valve until it stops and then push again to ensure it is seated properly and forms
a water tight seal.
6. Turn back on the water supply allow the system to pressurize and check for leaks.
Figure 12
Figure 13
Summary of Contents for 3MAPPM150
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