Product specifications

Replacing the Sediment Pre-fi lter
The sediment pre-fi lter is in the fi lter canister on the left side of the assembly (position 1), beneath the
“IN (FEED WATER)” marking on the aluminum frame. The sediment pre-fi lter will likely be rather
distasteful looking—as it is common for sludge to form on the fi lter 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-fi lter canister) to reduce
any back pressure remaining in the canister.
b) Firmly grasp the canister with both hands and unscrew it from the pre-fi lter assembly. Carefully
move the canister over the bucket, dump the water, and remove the old pre-fi lter.
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-fi lter into the canister, and then carefully re-attach the canister to the assembly.
Tighten until fi rm.
Replacing the Twin GAC Pre-fi lters
The twin unidirectional, GAC pre-fi lters are in the middle canister (position 2) and the canister on the
right (position 3). Follow the same procedure as described for replacing the sediment pre-fi lter (above).
Replacing the 4-Stage DI Module
(Before proceeding, study Figure 5 below)
The tubing is attached to the module using a unique push-in fi tting system manufactured by John
Guest® Company. This system is designed to make connecting and disconnecting fi lter modules very
easy while insuring a water tight connection.
The “collet” assem-
bly will securely
hold the tubing
in place under
normal operating
conditions. Pulling
on the tubing will
not cause it to re-
lease, instead the
“grip” of the collet
will become more
secure. An O-ring
behind the collet
assures a leak free seal.
a) Disconnect the tubing from both ends of the DI module. (If the DI module was mounted vertically,
you might fi nd less water will be spilled if you remove the tubing from the outlet end after remov-
ing the module from the retaining clamp.)
b) Remove one screw from the clamp and remove the old DI module. (The clamp is fairly fl exible and
can be bent out to allow the module to be removed.) Note the direction of the “FLOW” arrow. You
will need to install the new DI module in the same orientation.
c) Place the new DI module into position, taking care to note the direction of fl ow. Secure the clamp
and re-connect the tubing. Gently tug on the tubing to insure a secure, leak free connection.
Returning the System to Service
To return your system to service:
1) Open the sink mounted chrome faucet.
2) Return the membrane fl ush valve to the “production” position.
Collet
Insert tubing
5
/
8 " into "collet"
Depress "collet" to release
Figure 5, John Guest® “Speedfi t” fi ttings
Maintenance and Servicing 14