Purenex Multipure Aqua RO System - Manual (Page 17)

Depressurize the system by turning off the water supply at the adapta valve and
turning valve on tank 1/4 turn.
Step 1 To change the membrane, use a 5/8” wrench to remove the Green
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.
Use the hand tool shipped with the unit to loosen. Turn cap
counter-clockwise to loosen.
Step 3 Using a pair of pliers, grip and pull firmly on the membrane to
remove from the housing and discard in your normal refuse.
Step 4 Unwrap new membrane and lubricate the o-rings with water soluble
lubrication before inserting into housing. Insert 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. Use the hand tool to tighten, but do not OVERTIGHTEN.
NOTE: To be properly seated, the tip of the membrane must be below the housing edge.
Step 6 After replacing membrane housing into clips, attach the green tube to the elbow on cap
using a 5/8” wrench.
Step 7 The flow restrictor must be changed each time you change the membrane. Replace the
existing flow restrictor with the new one by removing the white compression nuts. Be sure
to orientate the flow with the arrow pointing toward the faucet.
Step 8 Follow Start Up instructions to restart your system.
Membrane Maintenance
Membranes have a life expectancy of between 2 and 3 years, depending on the incoming water conditions
and the amount of water processed through the RO membrane.
Normally, a membrane would be replaced during a semi-annual 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.
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