1) Remove the contents from beneath the kitchen sink where the filter assembly is located.
2) Turn off the cold water supply line.
3) Drain ALL the water from the storage tank by opening the sink mounted faucet.
4) Close the faucet and the ball valve on the top of the storage tank.
5) Open the Flush Valve (relieves pressure)
6) Place a towel beneath the pre-filter/RO assembly—it will absorb the small amount of water that
will spill from the modules as they are changed out.
It is often helpful to have an empty 3-5 gallon bucket nearby.
Replacing the Sediment pre-filter
The sediment pre-filter is in the canister on the left side of the assembly, beneath the manual flush
valve. The sediment pre-filter will likely be distasteful looking—it is common for sludge to form on the
filter surface. After one year, this sludge layer can be fairly thick.
a) Push the red button (on the top of the aluminum frame, above the pre-filter canister) to reduce any
back pressure remaining in the canister.
b) Firmly grasp the canister with both hands and unscrew it from the pre-filter assembly. (A canister
wrench is available.) Carefully move the canister over the bucket, dump the water, and remove the
old pre-filter.
c) Using a long handled, soft bristle brush, scrub the inside of the canister with a mild dish washing
detergent and rinse.
d) Place the new pre-filter into the canister, and then carefully re-attach the canister to the assembly.
Tighten until firm.
Replacing the GAC pre-filters
The twin unidirectional, GAC pre-filters are in the middle canister and the canister on the right. Follow
the same procedure as described for replacing the sediment pre-filter (above).
Replacing the Di Module
(Refer to page 30, Appendix C, for details on releasing tubing from Speedfit® fittings)
1) Disconnect the tubing from both ends of the DI module. Some water will pour from the tubing once
released. (If the DI module was mounted vertically, you might find less water will be spilled if you
remove the tubing from the outlet end
after
removing the module from the retaining clamp.)
2) Remove the top screw from the clamp and remove the old DI module. (The clamp is flexible and
can be bent out to allow the module to be removed.)
Note the direction of flow. You will need to
install the new DI module in the same orientation.
3) Unscrew the
Speedfit®
fittings from both ends of the module. Scrape away the old Teflon® thread
tape (without damaging the plastic threads) and re-wrap the threads.
4) Install the
Speedfit®
fittings into the new DI module.
5) Place the new DI module into position, taking care to note the direction of flow. Secure the clamp
and re-connect only the tubing from the main assembly. Gently tug on the tubing to insure a secure,
leak free connection.
18 Maintenance & Servicing
