Changing Filters, Cont. Changing the Membrane
We strongly recommend that you seek the services of a Hague dealer to change your RO membrane, as well
as perform a complete check-up and re-sanitize your appliance.
Be sure to order the proper type of membrane for your appliance: CTA or TFC. See Assembly and Parts, RO
Assembly.
1. Turn off the ball valve on top of the storage tank 1/4 turn clockwise (See Figure 2).
2. Turn off the feed water supply valve.
3. Lift the black handle on the dispensing spigot and wait at least five minutes for the pressure to be
relieved from the appliance.
4. Detach the red tubing connection on the pressure vessel end cap. (See Figure 18, Item 11.)
5. Remove the pressure vessel end cap by turning counterclockwise.
6. Remove the membrane, use needle nose pliers to grab the product tube and pull the membrane out of
the housing.
7. Sanitize the appliance. (See Sanitizing the WaterMax RO Appliance).
8. Insert the new membrane, making sure that the brine seal (See Figure 16) and the product water
O-Rings are seated. Lubricate the brine seal and O-Rings with glycerin.
9. Inspect the O-Rings on the pressure vessel end cap and lubricate with glycerin. Replace if damaged or
out of round.
10. Replace the end cap by turning clockwise.
11. Reattach the tubing to the pressure vessel end cap.
Changing the Carbon Post-Filter
1. Turn off the ball valve on top of the storage tank 1/4 turn clockwise. (See Figure 2.)
2. Turn off the feed water supply valve.
3. Lift the black handle of the dispensing spigot and wait at least five minutes for the pressure to be
relieved from the system.
4. Remove the Carbon Post-Filter housing by turning it counterclockwise (as viewed from the bottom) and
dispose of the spent cartridge. If you encounter difficulty, use the filter wrench provided with your RO.
5. Wash out the Post-Filter housing using warm soapy water and rinse thoroughly.
6. Be sure the O-Ring is properly seated in the groove located in the top of the post-filter housing and
lubricate with glycerin.
7. Sanitize the storage tank. (See Sanitizing the WaterMax RO Appliance.)
8. Insert the new Carbon Post-Filter of the same type and reattach the Post-Filter housing.
9. Turn on the feed water supply valve.
10. Turn on the storage tank valve.
11. Inspect for leaks.
12. Allow the first two tanks full of water to flush the Carbon Post-Filter before use.
WaterMax RO Owner’s Manual 11/11/2009 26