APEC ROES-PH75 System Filter Change Instruction
Changing Stages 1, 2, 3 Pre-Filters: (should be changed at least every 6-12 months)
1) Turn OFF cold water supply to RO system by turning the needle valve stem to the right until it stops, or you can turn off the cold
main water valve. Turn OFF the tank ball valve by turning the blue handle 90 degrees. Lift up RO faucet lever briefly to relieve
the built-up pressure inside the RO system. This will make opening the housings easier.
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 gently 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 housing grooves. Use wrench to tighten each
housing.
5) Remember: Turn ON the cold water supply and OPEN the tank valve after finished changing filters! 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. A Correct Direction
Changing Stage-4 Membrane: (should be changed every 2-3 years)
1) Turn OFF the cold water supply to RO system. Turn OFF the tank ball-valve by turning blue handle 90 degrees. 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. B. Locate the Membrane housing on the system (labeled “Membrane”). Remove the RED tubing from the housing’s
cap at point D. (see Fig B). To remove tubing, Push In and Hold Down on the collet ring square against the fitting. With the
collet held in this position the tube can be removed. 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. A. above. The
membrane cannot filter water if it’s inserted in the WRONG direction!
4) Close the housing cap. Reconnect the RED tubing to the cap by pushing it into the quick connect fitting, then gently pull back on
the tubing to make sure the connection was secure. 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). Check for leaks!
5) Drain the first tank of water (through faucet) to flush out the new membrane! The 2
nd
tank is ready for use.
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