3030226 Rev. D 5-9 Routine Maintenance
1. Prior to performing maintenance on any tube fitting, relieve pressure in the
tubing system; i.e., turn off the pump, open a drain port, etc.
2. Remove the red locking clip (if applicable).
3. Push the collar in towards the body of fitting. This releases the ‘gripper’ that
holds the tube in place.
4. Hold the collar in while gently pulling the tube away from the fitting.
5. Remove the gripper collar by pulling straight out. Reach into the opening with a
small, blunt (non-scratching) probe and remove the O-ring(s). Inspect the collar
to insure that all grippers are intact.
6. Rinse the O-ring with warm running water to remove any debris and set aside to
dry on a clean paper towel.
7. Clean the inside of the fitting with a wet cotton swab or paper towel to remove
any debris. Be sure not to leave any cotton fibers from the swab or towel inside
the fitting.
8. Lubricate the O-ring(s) sparingly with silicone O-ring lubricant and place the O-
ring back inside the fitting.
9. Replace the gripper collar.
10. With a sharp utility knife, cut off approximately ½” of tube. Carefully cut the
tube as square (perpendicular to the length) as possible. Inspect remaining
tubing for marks/scratches and replace/repair as necessary.
11. Place the tube in the fitting opening and push firmly until the tube seats fully
into the socket.
12. Pull back on the tubing to seat the grippers and re-install the locking clip (if
applicable) between the body of the fitting and the collar (flat side towards the
body).
13. Re-pressurize the system (if applicable) and inspect for leaks.
14. If the leak is not resolved, replace the entire tube fitting or tube.
5.2.2 Conductivity/Temperature Sensor Verification
1. Log the product TDS/µS, RO feed water TDS/µS and the product water
temperature after the RO has run for 15 minutes.
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