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This reverse osmosis system contains a replaceable component (the RO membrane) which is critical to the efficiency of
the system. Replacement of this reverse osmosis membrane should be with one of identical specifications as defined by
Watts Premier to assure the same efficiency and contaminant reduction performance.
Membrane Replacement
Membranes have a life expectancy between 2 and 5 years, depending on the incoming water conditions and
the amount the RO system is used. This reverse osmosis membrane is critical for effective reduction of total
dissolved solids (TDS). The product water should be tested periodically to verify that the system is performing
satisfactorily.
Normally, a membrane would be replaced during a semiannual or annual filter change. However, if at any time
you notice a reduction in water production or an unpleasant taste in the reverse osmosis water, it could be time
to replace the membrane. Watts Premier recommends replacing the membrane when TDS reduction falls below
75%.
Note:
A water sample may be sent to Watts Premier for a free diagnosis of your membrane
performance. To send a water sample, use two (2) clean containers and fill ½ cup of tap water
in one container and ½ cup of reverse osmosis water in 2nd container. Clearly label each
sample. Send the samples to the address listed on the cover of this manual attention "Water
Samples". Watts Premier will test the water and mail or call you with the results.
Step 1
Turn off the incoming water supply to the RO by turning the needle
valve on the adapt-a-valve clockwise until it stops.
Step 2
Open the RO Faucet and allow water to drain from the tank until it
is completely empty.
Removing the membrane:
Step 1
Use a 5/8" wrench to remove the Green Tube fitting on the left side
of the horizontal membrane housing (end with one elbow).
Remove the cap from the membrane housing by turning it counter
Step 2
clockwise to loosen.
Note:
A double sided wrench may be purchased from Premier to aid with
loosening the cap / filter housings. (Part # 164003)
Step 3
Remove membrane housing from the holding clips. Using a pair of
pliers, grip the PVC tube of the RO membrane and pull firmly on the
membrane to remove from the housing and discard.
Installing the membrane:
Step 4
Lubricate the O-rings on the new membrane with a water soluble
lubricant such as KY Jelly ®. Insert the end with the two black
O-rings first into the housing.
Step 5
Once membrane has been inserted into the housing you must take
your thumbs and give a firm push to properly seat the membrane.
Replace membrane housing cap and tighten.
Step 6
After replacing membrane housing into clips, attach the green tube
to the elbow on cap using 5/8" wrench.
Step 7
The flow restrictor must be replaced each time you change the
Membrane and is located on the black tube above the membrane
housing. To remove it, loosen and remove the white compression
nuts on each end. Remove flow restrictor and replace with a new one.
Make sure the flow direction arrow is pointing toward the faucet.
Step 5
Follow the Start Up Instructions on page 12.
Page 15
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