Instructions / Assembly

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. Turn OFF the tank ball

valve by turning the blue handle 90 degrees. Turn on 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 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 housings 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

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. Turn on RO faucet lever briefly to relieve 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 or WHITE tubing from

the housing’s cap at point D. For Quick Connect fitting, 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. For threaded fitting, unscrew the plastic nut (not the

L-shape fitting) and pull out tubing. 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 or 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).

5) Check for leaks!

6) Drain the first tanks of water (through faucet) to flush out the new membrane! The 2nd tank of water is ready for use.

Correct direction

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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. Turn OFF the tank ball valve by turning the blue handle 90 degrees. Turn on 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.
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Changing Stage-5 Carbon TCR Filter: (should be changed every 2-3 years). The new stage-5 carbon filter (FI-ESTCR-QC) includes a new Tee Fitting on one end. The stage-5 filter is easily replaced by disconnecting the tubings from the old filters, and connecting the filter. Fig. B 1) Remove the OLD filter: See Fig. B. Disconnect the output tubing from point H and tubings at point G & F. To remove the tubing, Push In and Hold Down on the collet ring square against the fitting.