Membrane Replacement - Watts Premier RO-TFM-4SV Installation, Operation And Maintenance Manual

Membrane Replacement

Membranes have a life expectancy of between 2 and 5 years, depending on the incoming water
conditions and the amount of use of the RO system.
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. A water sample may be sent into Premier for a
free test or a TDS (total dissolved solids) monitor can be purchased from Watts Premier to test the
incoming and reverse osmosis water. Membranes should be replaced when TDS reduction is 80% or
less.
To send a water sample, include ½ cup of tap water and ½ cup of the system's reverse osmosis water
in clean containers. Clearly mark each container. Watts Premier will test the water and call or mail
you the results.
To change the membrane, use a 5/8" wrench to remove the Green
Step 1
Tube on the left side of the membrane housing (the end with only
one elbow).
Step 2
Remove the cap from the white horizontal membrane housing.
Turn Cap counter clockwise to loosen.
A double sided wrench can be purchased from Premier.
Note:
Remove membrane housing from the clips. Using a pair of pliers,
Step 3
grip the PVC tube of the RO membrane and pull firmly on the
membrane to remove from the housing and discard.
Step 4
Unwrap new membrane and lubricate the o-rings with water
soluble lubrication such as KY Jelly ®, canola oil or vegetable oil.
(DO NOT USE Vasaline) before inserting into housing. Insert the
end with the two black O-rings into the membrane 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.
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