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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 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 recommends replacing the membrane when TDS reduction falls below 75%.
Note:
A water sample may be sent to Watts 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
will test the water and mail or call you with the results.
Step 1
Turn off the incoming water supply to the RO and unplug power
transformer from electrical outlet.
Step 2
Open the RO Faucet and allow water to drain from the tank until it
is completely empty.
Removing the membrane:
Use a 5/8" wrench to remove the White Tube fitting on the left side
Step 1
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.
Step 3
You may 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 white tube
to the elbow on cap using 5/8" wrench.
Step 7
Follow the Start Up Instructions on page 9.
Page 13
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