SpectraPure
®
SpectraPure
®
Inc.
480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
8
FLOW RESTRICTOR REMOVAL, ADJUSTMENT AND REPLACEMENT
1. Locate the yellow concentrate tubing. Remove the tubing from its push fitting at the membrane as follows:
a.) Firmly depress and hold the push fitting collar down with your thumbnail.
b.) While the push fitting collar is depressed, pull the tubing straight out of the push fitting. Once the tubing is
removed, release the collar.
2. Carefully remove the flow restrictor assembly, now visible as a plastic insert In the end of the yellow tubing. You may
use an object such as a dull knife to help pry the flow restrictor insert from the end of the tubing. The entire flow
restrictor (consisting of the insert collar and thin capillary tubing) may then be gently extracted.
NOTE: Take care not to crush or otherwise damage the delicate capillary tubing
.
3. Refer to the Flow Restrictor Tables (Page 8). Find the table that represents the Flow Restrictor Assembly for the system
that you have. Find the
product flow rate
in the left-hand column and the
length of the flow restrictor
in the right-
hand column.
EXAMPLE:
If your Flow Restrictor Assembly is for a 90 GPD Membrane and the
product flow rate
is 170 ml/min,
then the flow restrictor length should be cut to 6.5 inches (16.5 mm). 170 is about halfway between 164
(7 in.) and 175 (6 in.).
4. Using a new single-edge razor blade, carefully measure and then cut the flow restrictor to the total length indicated.
5. Reinsert the flow restrictor assembly into the yellow tubing and firmly reseat the insert into the end of the yellow
tubing by carefully pressing on the insert with your thumbnail. Care should be taken not to crush or otherwise dam-
age the end of the capillary tubing protruding from the end of the insert.
6. Reinsert the yellow tubing into its push fitting in the RO membrane as follows:
a.) Moisten the O-ring seal inside the concentrate outlet fitting by dripping a few drops of clean water into the
fitting.
b.) Grasp the yellow tubing near the flow restrictor end, and insert the tubing into the push fitting. Push the
tubing into the fitting until resistance is felt, approximately 1/2 inch (12.7 mm). The tubing is now resting on
the O-ring seal inside the fitting.
c.) Firmly push the tubing approximately an additional 1/4 inch (6.35 mm) further into the fitting to completely
seat the line into the fitting and O-ring seal.
7. Turn on the system water supply and check for leaks prior to further use or testing. If a leak is observed, you may not
have pushed the yellow tubing into the push fitting far enough to seal the tubing against the O-ring. Turn off the
system water supply and reseat the tubing as described above.
