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19
2) Open housing: Have the RO standing upright. Slip the plastic wrench onto the #1 housing.
Looking down from a top view, you should open the housing turning clockwise. If necessary, lay
RO down on the floor to get a better leverage. If the housing is too tight, use a hammer and tap
on the wrench handle to help turn the wrench.
3) Discard 3 used filters, wash housings with mild soap, rinse off. Put 3 new filters into their
respective housings: sediment filter in stage-1, carbon block filters in stages 2 & 3.
4) Close up the housings. Make sure each housing has a black O-ring in the thread groves. Use
wrench to tighten each housing.
5) Remember: Turn ON the cold water supply and OPEN the tank valve after finished changing
filters!
6) Check for leaks!
After taking the housing off,
take out the dirty filters and
put the new 3 pre-filters in.
Remember, Stage 2 and Stage
3 are the same carbon filters.
Fig. 14
How to Replace Stage-4 Membrane:
1) Turn OFF the cold water supply to RO system. Turn OFF tank’s ball-valve. Lift up RO faucet
lever briefly to relief the built-up pressure inside the RO system. This will make opening the
housings easier.
2) See Fig.14A. Locate the Membrane housing on the system (labeled “Membrane”). Remove the
White tubing from the housing’s cap at point D. Do so by Pushing In and Holding Down on the
collet ring into the elbow fitting, then pulling out the tubing at the same time. (Do not remove the
L-shaped fitting). Open up the cap (turn counter-clockwise). Remove the used membrane.
Discard. Insert the new membrane using a pair of pliers. Push membrane into housing tightly.
Avoid touching the Membrane with your hands to prevent contamination!
3) Important! Make sure the “double-ring” end of the membrane goes into the housing first as
shown in Fig.14B below. The membrane cannot filter water if it’s inserted in the WRONG
direction!
4) Close the housing cap. Reconnect the White tubing to the cap. Turn on the cold water supply
and open the tank valve. Let the RO system run to re-fill the tank (takes about 2-3 hours).
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