Instructions / Assembly

APEC RO-PH90 System Filter Change Instruction

Changing Stages-1, 2, 3 Pre-Filters: (should be changed at least every 12 months)

1) Turn OFF cold water supply to RO system. Turn OFF the tank ball valve. Turn ON RO faucet 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 lightly 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 stage-2 and stage-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!

Changing Stage-4 Membrane: (should be changed every 3-5 years)

1) Turn OFF cold water supply to RO system. Turn OFF the tank ball valve. Turn ON RO faucet 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 tubing from the

housing’s cap at point D. To remove tubing, push in and Hold Down on the collet ring square against the fitting. With

the collet held in this position the tubing 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. 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 tank of water (through faucet) to flush out the new membrane! The 2

tank of water is ready for use.

Fig. A

3rd

Stage

2nd

Stage

1st

Stage

STEP1 STEP2

Use

Wrench

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 same carbon filters.

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APEC RO-PH90 System Filter Change Instruction Changing Stages-1, 2, 3 Pre-Filters: (should be changed at least every 12 months) 1) Turn OFF cold water supply to RO system. Turn OFF the tank ball valve. Turn ON RO faucet 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.
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Fig. B Changing Stage-5 Carbon TCR Filter: (should be changed every 3-5 years with Membrane) 1) Remove the OLD filter: See Fig. B. Disconnect the Input tubing from point J and Output tubing from point H. To remove the tubing, push in and hold down on the collet ring square against the fitting. With the collet held in this position the tubing can be removed. Unclip the filter from the membrane housing and discard the used filter. 2) Install NEW Filter: The QC filter will come with 2 end plugs.