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4. Pull the system out to where it can be easily worked with. If the system was installed with
enough tubing to do so, simply pull it out to where it can be worked on. If the system does not
have enough tubing, you will need to disconnect the lines to pull it out. (When changing the
membrane, it helps to have a towel handy, as some water may leak out.) Make note of which
tube goes where to ensure the system will be hooked up the same way it was.
5. Disconnect the tube feeding the membrane (the tube going to the single fitting on the
membrane housing cap). If unsure how to disconnect the quick connect fittings, refer to the
section on quick connect near the beginning of the manual.
6. Remove the membrane housing cap (when looking at the fitting on the cap it will turn
counterclockwise to loosen).
7. Remove the membrane from the housing. A pair of needle nosed pliers may be needed to grip
the end of the membrane. To remove, gently pull with a twisting motion and the membrane
should slide out.
8. Lubricate the O-rings on the membrane with a silicon based lubricant (vegetable oil may be
used if silicon lubricant is not available), and push back into the housing. DO NOT USE
VASELINE! This will damage the o-rings and void any warranty on the system. We are
not responsible for any damaged caused by using Vaseline or other petroleum
lubricants.
9. Lubricate the O-ring on the membrane housing (some housings have 2) and screw the
membrane housing cap back onto the housing.
10. Push the tubing back into the fitting on the membrane cap.
11. If the filters need changed, now is a good time to do so, since the system is turned off.
12. If the system was unhooked to change the filters, hook it back up now. Open the angle ball
valve on the feed water line and open the tank ball valve.
13. Open the faucet, tilt the system back and forth to help work the air out of the lines.
14. Allow the system some time to start producing water from the faucet, depending on the system
and water pressure this may take up to 30 minutes. Once you are getting a steady flow of
water (anything from a steady drip to a small stream, depending on membrane size and water
pressure), shut the faucet off.
15. Allow the system to fill the tank. Depending on the system and water pressure, this can take
anywhere from 1 - 5 hours.
16. Once the tank has filled, open the faucet, allowing all the water to drain until flow from the
faucet is down to the slow drip or stream seen in step 14. This flushes the system, cleaning
the membrane and preparing it for use.
17. Repeat steps 15-16 at least once to ensure thorough flushing of the new filters.
18. Your membrane is now changed and the system is ready to use again.
O-rings:
The filter housings on the system utilize O-rings (black rubber washers, located in a grove right
below the threads on the housing) to seal themselves. To prevent leaks it is recommended to
check the O-rings every time the housings are opened. Ensure there are no nicks, kinks, or
gouges in the O-ring. If damage is found, replace before continuing, otherwise, use a silicon
based lubricant (vegetable oil can be used if no silicone lubricant is available) and lubricate the O-
ring before replacing the housing. DO NOT USE VASELINE! This will damage the o-rings and
void any warranty on the system. We are not responsible for any damaged caused by using
Vaseline or other petroleum lubricants. To ensure a good seal and minimize any possibility of
leaks, it is recommended you replace your O-rings periodically, usually every 1-2 years.
AFW RO System Manual
©Abundant Flow Water System, Inc. 2009
[11]
Revised 9/09
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