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.
If at any time you notice a reduction in water production or a change in the taste of the RO water, it could be time to replace the
membrane. A sample of water may be sent to Watts for a free test or a monitor can be purchased from Watts to test RO water.
To send a water sample include cup of tap water and cup of RO water in water tight clean containers. Clearly mark each con-
tainer. Watts will test the water for TDS rejection and hardnes and contact you with the results.
10
Membrane Maintenence
Step 1 To change the membrane, use a
5
/8
" wrench to remove the nut from
the cap side of the membrane housing (the end with only one
elbow). Remove the cap from the white horizontal
membrane housing.
Note: To assist with the removal of cap a double sided wrench
(part no. WP 164002) can be purchased from Watts.
Step 3 Unwrap new membrane filter and lubricate the O-rings with water soluble
lubrication such as KY Jelly
®
. Insert the end with the two black O-rings into the
membrane housing
Step 4 Once membrane filter 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.
Note: To be properly seated the tip of the membrane filter must be below the hous-
ing edge.
Step 5 Screw the membrane filter housing cap back on securely.
Step 6 Connect the green tube back to the membrane cap fitting.
Step 7 You must change the flow restrictor each time you change the Membrane
filter. Replace the existing flow restrictor with the new one by removing the
White compression nuts. Make sure the arrow is pointing toward the check
valves and hot water line fitting.
Step 8 Follow Start Up procedures on page 8.
Step 2 Using a pair of pliers, grip and pull firmly on the membrane filter to remove it from the
housing and discard the membrane.
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