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www.aquasafecanada.com   |   Maximus II Installation Instructions 05/13   |   page 21

page 20   |   Maximus II Installation Instructions 05/13   |   www.aquasafecanada.com 

Stage 4 – When should I change the Reverse Osmosis Membrane?

The R.O. Membrane is the very heart of your Aquasafe Reverse Osmosis System.  The R.O. Membrane 
is rated for an average of 4000-5000 Gallons of purified water production.  If you have a TDS Meter a 
very simple but critical test you can perform in order to determine if your R.O. Membrane needs to be 
replaced is to measure the PPM reduction rate of the purified (permeate) water coming directly out of 
the R.O. Membrane housing (see Fig. 29 and 30 for how to do this).

Testing to see if your R.O. Membrane needs replacing.

Step 1. How to depressurize your system

 (Fig 29)

Step 2. Test your permeate water

 (Fig 30) 

The PPM count should be 15% or less from that of your unfiltered tap water that can be gathered from 
any cold water tap in your home.  
•  Example:  if your unfiltered tap water is 200ppm then the purified permeate water coming out of 

the R.O. Membrane should be 30ppm or less (200 x 0.15).

If your R.O. Membrane is not producing the 85% or better in PPM reduction as depicted above, you 
need to change this membrane.

1

2

3

Shut off the flow of water to the feed 

water supply line of your system via the 

Manual Shut Off Valve found spliced 

into the feed water line. 

Turn the tank top valve, 

found on top of your 

water holding tank,

to its “OFF” position.

feed 

water 

line 

Manual Shut-Off Valve

in OFF position

Final Polishing Filter

Press down on your 

kitchen faucet until the 

flow of water stops to 

complete the 

depressurizing process.

Tank Top Valve

in OFF position

ON

OFF

Manual Shut-Off Valve (top view)

TOP VIEW OF SYSTEM

3 Way T

to aquarium sump tank

1

4

Depressurize your system (see Fig. 29)

2

Remove (see Fig 10) the blue tubing coming out 

of the R.O. Membrane housing from 

where it connects into the D.I. Resin Canister. 

Gather some water coming from the 

disconnected blue tube and test the PPM count 

with your TDS Meter.  The PPM count should be 

15% (or less) than that of your unfiltered water. 

Turn the feed 

water back ON 

with the Manual 

Shut-Off Valve 

NOTE: 

Back View - 

hanging 

bracket 

not shown 

for clarity

Manual 

Shut-Off Valve

in “OFF” position

E-Z Flush

Flow Restrictor

feed water in

yellow tubing

to discharge 

saddle clamp

3

TDS Meter 

Figure 29

How to  

depressurize  

your system

Figure 30

Testing your  

permeate water 

with the TDS 

meter

WARNING

Are you unsure when you last replaced your R.O. Membrane?

Because the weekly gallon demand varies greatly from one aquarium enthusiast to the next, we 
highly recommend that you test your water immediately as described above to see if your mem-
brane is still producing an 85% ppm reduction from your normal tap water (based on the permeate 
water test in Fig 30). If you don’t have a TDS meter to do this with, get one right away. The health 
of your aquarium depends on it. If you can’t verify the ppm of your water you can’t guarantee that 
your aquarium isn’t being exposed to harmful contaminants.

Stage 5, 6 & 7 –  When should I change the resin in the D.I. Resin Canisters?

The D.I. Resin Beads inside the D.I. Resin Canister typically need to be changed along with your pre-
filter changes.  However this is not always the case.  The D.I. Resin is “color-indicating” – meaning it 
changes color to signify when the resin has become exhausted and needs to be changed.  The color-
indicating resin will change from emerald green to amber-orange or brown when exhausted.  All 
Aquasafe D.I. canisters are 100% reusable by way of the removable blue end caps.

Stage 8 – When should I change the Final Polishing Filter?

This is the final filtration stage in your R.O. System.  The Final Polishing filter is rated for 1800-2000 
gallons of purified water production and therefore should be changed every second time you change 
your three pre-filters. 

It can be misleading when trying to observe the color of the resin when the canister is filled 

with water as the water gives a darkening effect.  To observe the true color of the resin it is best to 
hold a flashlight to the canister to illuminate the true color of the resin.  Alternatively, disconnect 
the tubing from one side of the D.I. Canister to allow a portion of water to drain from the canister 
revealing the true color of the resin.  Please remember to depressurize your system (see Fig. 29) 

before disconnecting tubing from any point on your system.

TIP

Summary of Contents for Aquarium II Dual R.O./D.I. System

Page 1: ...commend a fully automatic booster pump which is found on our websites general parts and accessories page We also highly recommend a booster pump if your water is extremely turbid with ppm counts beyond 600ppm The installation instructions that follow are extremely detailed if a leak is experienced during installation please see the Leak Prevention Section on page 18 ATTENTION It is extremely impor...

Page 2: ...l Reverse Osmosis System COMBO 1 0 Relax take your time You will find this process easy and straight forward 1 2 0 Take everything out of the box 2 3 0 Remove the protective plastic from the prefilters 2 4 0 Inserting the R O Membrane 3 4 1 Inserting the pre filter elbow adaptors 3 5 0 Preparing the Feed Water to your system 3 5 1 Special note about braided wire plumbing 4 5 2 Installing the Needl...

Page 3: ...s water inlet side water outlet side Figure 5 Screw elbow adaptors into inlet and outlet of the pre filter housings www aquasafecanada com Insert blue RO Membrane into housing Screw cap on housing 1 2 Membrane housing blue RO Membrane Cap Figure 4 Inserting the R O Membrane in to its housing TIP 2 0 Take everything out of the box Examine the contents of the Large and Small Parts Bag against the di...

Page 4: ...view 5 1 Special note about braided wire plumbing Please Note DO NOT ATTEMPT TO INSTALL THE NEEDLE PIERCING SADDLE CLAMP TO BRAIDED WIRE PLUMBING Fig 6 You can install the needle piercing saddle clamp to all other forms of cold water lines found under the common sink just not the kind of plumbing de picted in Fig 6 The braided plumbing in Fig 6 is too soft a material and will therefore not allow f...

Page 5: ... for clarity 1 2 Put a bowl or bucket under the short piece of blue tubing coming out of the ASV to catch the PERMEATE water cleaned by the R O Membrane E Z Flush Flow Restrictor Close the E Z Flush Flow Restrictor and turn the Manual Shut Off Valve on blue tubing Manual Shut Off Valve to water supply 3 Figure 12 Preparing to set up the E Z Flush Flow Restrictor You can now turn your home s emerge...

Page 6: ...n do ing this timed measurement the permeate water should take three times as long to fill the same volume over that of the brine water 3 1 Ratio We do not recommend anything over a 1 1 ratio as it is extremely important for the R O Membrane to have adequate BRINE flow to be able to flush away the harmful particulates it is removing while filtering the water A setting near to or at 1 1 ratio is on...

Page 7: ... I Canister and connect it to the second D I Canister using a 4 inch length of blue tube 3 Connect the last elbow to the right side of the third D I Canister www aquasafecanada com D I Canisters rotated back to make room elbow elbow www aquasafecanada com The Final Polishing Filter remineralizes your water to ensure it has a full bod ied taste Because of this the ppm of the water dispensed at your...

Page 8: ...mply press the saddle clamp firmly onto the drain in order to catch the bolts on the opposite side TIP Figure 23 Assembling and attaching the drain saddle clamp rubber gasket quick connect fitting drain pipe yellow drain line Insert yellow drain line into quick connect fitting rubber gasket 1 2 Remove the backing from the gasket and stick it to the inside of the saddle clamp making sure that the y...

Page 9: ...ver use it again you would probably be better off either renting the equipment or calling in a Pro Most glass installers have diamond drills and all vendors of stone have them Some will rent it out as will Rent All stores Start the hole by drilling a hole in a piece of scrap wood This will serve as a guide Hold the piece of wood and let the diamond drill bit do the work DO NOT push down or apply p...

Page 10: ...all the PSI Meter onto your system there one area where installing the PSI Meter on your system can be of use Option 1 If you are on a well water system and you think you may have lower then 50 psi through out your home s plumbing a good place to install the PSI Meter is on the feed water line to your Reverse Osmosis System between the Manual Shut Off Valve and the inlet to the first pre filter ho...

Page 11: ...II Dual System Filter Change Schedule Pre Post filters Defined as the filter stages Pre before RO Membrane and Post after RO Membrane Stage 1 2 3 Pre Filters When to conduct a filter change Stages 1 2 and 3 are your system s pre filters which need to be changed every 1000 gallons of purified water produced The average household consumes 3 5 gallons of drinking and cooking water daily At 5 gallons ...

Page 12: ...er back ON with the Manual Shut Off Valve NOTE Back View hanging bracket not shown for clarity Manual Shut Off Valve in OFF position E Z Flush Flow Restrictor feed water in yellow tubing to discharge saddle clamp 3 TDS Meter Figure 29 How to depressurize your system Figure 30 Testing your permeate water with the TDS meter WARNING Are you unsure when you last replaced your R O Membrane Because the ...

Page 13: ...re filters for 10 15 minutes 4 5 feed water in yellow tubing to discharge saddle clamp DONE After the 10 15 minute flush turn Manual Shut Off Valve back OFF and reconnect the white and yellow tubes to their original positions If this is the only filter change you are doing at this time you can turn the Manual Shut Off Valve and Tank Top Valve back ON and you are to faucet 3 Way T www aquasafecanad...

Page 14: ...y pushing the canister down onto its canister clips Repeat for second and third D I Canisters Reinsert the blue tubing into the elbows on both sides of the D I Resin Canister Turn on the Manual Shut Off Valve and Tank Top Valve to repressurize your system Figure 36a Replacing the D I Resin Beads If you are done replacing filters for now you can re pressurize your system by turning on the feed wate...

Page 15: ...ceeds 113 F 45 C The membrane is not subjected to a pH lower then 4 or higher then 11 The membrane is exposed to water pressure greater then 150 psi The membrane is allowed to dry out after its initial wetting The Membrane should always be kept moist after its initial exposure to water If the membrane is exposed to greater than 1500 PPM water BOOSTER PUMPS Reverse Osmosis Booster Pumps are warrant...

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