Express Water Commercial Reverse Osmosis System User manual

Cu󰏭omer Support 1-800-992-8876
Commercial Reverse
Osmosis System
Installation Manual

Reverse Osmosis
Overall System Connections
Hello!
You’ve taken the rst step to having healthier and better from now on thanks to Express Water’s
Commercial Reverse Osmosis Water Filtration System. Your new ltration system protects you
and any appliances from contaminants with hundreds of gallons of perfectly pure water every
day.
If at any point in the installation process you have questions just give us a call from 10am-5pm
(Pacic Time) at 1-800-992-8876 Monday - Friday

READ THIS FIRST
Please pay attention to the following in󰍰allation and safety recommendations:
Read the in󰎤allation manual before in󰎤alling this sy󰎤em.
NOTE! Please make sure your in󰍰allation location has enough room and access to a 110v power supply.
Incoming Water
Incoming water pressure mu󰍰 be between 10 PSI and 100 PSI. Te󰍰 your water occasionally to make sure
the sy󰍰em is performing. If your water is microbiologically unsafe or of unknown quality do not use this
sy󰍰em without adequate disinfection before or after the sy󰍰em. Extremely hot or cold incoming water will
damage the sy󰍰em and cannot be used. Your Untreated Water Inow quality will determine your needs for
pretreatment and ltration.
Leaks
Inspect all connections after the in󰍰allation to make sure no leaks occur, wait until after the sy󰍰em is
pressurized to inspect again. Check the sy󰍰em occasionally after in󰍰allation or maintenance to make sure no
leaks have developed. In󰍰all the sy󰍰em in a location with adequate drainage.
General
This Commercial RO Sy󰍰em is for climate controlled indoor use only. Exposure to overly high or low
temperature ranges will damage the unit. Follow all of your 󰍰ate and local laws and codes regarding
plumbing even if they dier from what is 󰍰ated in this manual. If your 󰍰ate law requires it or you prefer to
we recommend using a professional licensed in󰍰aller or plumber who meets the requirements of this sy󰍰em.
All O-Rings, ttings, lter cani󰍰ers, and teon tape wears out after a certain period of time. The lifetime of
your components are subject to change with the quality of the water supplied. Do not handle an unwrapped
lter directly with your bare hands as this can cause early lter failure. Use appropriate eye protection when
performing any drilling.
Maintenance
The owner/user is obligated to properly inspect and maintain the Commercial RO Sy󰍰em when necessary, at
lea󰍰 every 1 year. This includes the following:
Replace the O-Rings on the lter housings, membrane housing, boo󰍰er pump, ttings, and lter cartridges.
Replace any connectors and lter housings with proper replacement parts.
Sanitize your sy󰍰em as often as needed (this changes with the prole of your area’s incoming water).
Always use proper replacement lter cartridges with the correct size and length replacements.
Replace the Teon Tape on all threaded connections and ttings.
Copyright © 2020 by Express Water Inc.
All rights reserved. No part of this publication may be reproduced, di󰍰ributed, or transmitted in any form or
by any means, including photocopying, recording, or other electronic or mechanical methods, without the
prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews
and certain other noncommercial uses permitted by copyright law.
Conditions

Table of Contents
Introduction
In󰍰allation Notes
Components Li󰍰
Sy󰍰em Components
Sy󰍰em Guide
Tubing Quick Connect Guide
In󰎣allation
Feed Water Adapter Valve
Drain Saddle
Filter Housing Assembly
Water Storage Tank
Sy󰍰em Connections
Sy󰎣em Startup
Sy󰎣em Maintenance
Filter Change In󰍰ruction
How to Sanitize your RO Drinking Water Sy󰍰em
FAQ
Warranty
Page 1
Page 2
Page 2
Page 3
Page 4
Page 5
Page 6
Page 8
Page 9
Page 10
Page 11
Page 12
Page 12
Page 13
Page 14
Page 15
Page 17

1
Introduction
You have purchased the ne󰍰 Commercial Reverse Osmosis Water Filtration Sy󰍰em available for your
water purication. When properly maintained this sy󰍰em will provide you with years of great ta󰍰ing pure
drinking water and trouble-free service.
Please read the manual section regarding the proper care and maintenance of your new RO Sy󰍰em
before proceeding with your in󰍰allation. Also, please make sure to inspect the package for any missing
components or shipping damages.
Simply read through the manual and complete the 󰍰eps in order and you’ll have your sy󰍰em up and
running in no time. If you nd any issues or have que󰍰ions please contact Express Water from 10am to
5pm (Pacic Time) at: 1-800-992-8876 Monday - Friday
Visit ExpressWater.com for lter replacements
Replacements Table
Stage 2 and 3
Activated Carbon Block Filter
FLTWH2025C02 6 Months
Part
Stage 1
5 Micron Sediment Filter
Model
FLTWH2025S
Service Life
6 Months
Stage 4
RO Membrane
Custom Order
Please contact us for
these items
6 Months - 1 Year
Stage 5
Post Activated Carbon Filter
1 Year
Booster Pump 1 Year

2
In󰎣allation Notes
Tools Required
Before you begin please make sure you have all of the following tools ready to use:
Box Cutter / Tube Cutter
Phillips-Head Screwdriver
Power Drill
3/8” Drill Bit (for Drain Saddle)
Adjuable Wrench
Teon Tape
Components Li󰎣
Your new Commercial Reverse Osmosis Water Sy󰍰em should include the following items.
If any item is missing please contact Express Water.
Please take a few moments to check all the following components:
Accessories and Connections
19ft of 3/8” Tubing Drain Saddle Package
Foam Gasket2 Drain Clamp Halves
2 Nuts
2 Bolts
Feed Water Adapter Valve
Valve
Body
Filter Housing Wrench
Membrane Housing Wrench

3
Sy󰎣em Components
1. Feed Water Adapter Valve
2. Solenoid
3. Stage 1 Sediment Filter
4. Stage 2 Carbon Block Filter
5. Stage 3 Carbon Block Filter
6. Male Tee (3/8”)
7. Male Elbow (3/8”)
8. Low Pressure Switch
9. Flow Splitter (3/8”)
10. Adapter (3/8” to 1/4” QC)
11. Adapter (3/8” male to 3/8” QC)
12. Incoming Pressure Gauge
13. Operating Pressure Gauge
14. Male Membrane Elbow
15. Check Valve (3/8”)
16. High Pressure Switch
17. Flow Restrictor
18. Male Branch Tee
19. Post Carbon Filter
20. RO Membrane Housing
21. Booster Pump
1
3
in
out
Stage
1
Stage
2
Stage
3
in in
out out
45
6
7
7
7
8
10
11 11
11 11
11 11
12
13
15
16
18 19
20
21
17
14
14
10
9
9
7777
7
7
7
Drain Line
Pure Water
Outow
(Optional)
Tank Connection
2

4
Sy󰎣em Guide
Working Pressure Gauge
This will show the pressure
at which your Boo󰏭er
Pump is operating.
Incoming Pressure Gauge
This will show the pressure
of your incoming water.
Untreated Water Inow
This is where your
untreated or “tap” water
enters the sy󰏭em. The
water then proceeds
through the ve 󰏭ages of
ltration.
Pure Water Outow
This is where the sy󰏭em
delivers your puried
water, this can be routed
into a faucet or directly
into an appliance or other
device.
Drain Line
This is where the impure
water rejected by
the Reverse Osmosis
Membrane (the 4th 󰏭age
of ltration) is ushed
out. This should go to a
drainage pipe or other
outlet. This water is not
safe for consumption, but
can be used for purposes
like watering plants. The
sy󰏭em rejects between 1
and 3 gallons of water on
average

5
Tubing Quick Connect Guide
To Cut Tubing
Make your cuts again󰍰 a at cutting surface with a razor blade, or use a handheld tube cutter. Any cuts to
your Tubing mu󰍰 be perfectly 󰍰raight.
NOTE!
Improperly cut Tubing may leak water or fail to lock into Fittings.
Wait until all elements of your RO Sy󰍰em are in their nal locations before cutting your Tubing.
Make sure you measure the length you will need before cutting. Please avoid unnecessary additional tubing
as it will aect the eciency of your water production and delivery.
Attach Tubing
Push Tubing in 󰍰raight and level with
the Collet. The Tubing will go 13/16ths of
an inch into the Collet before the lock is
activated. Pull out on the Tube to make
sure the lock has activated and the Tubing
is secure.
13/16”
13/16”
The tubing in your RO Sy󰍰em uses a Quick Connect locking mechanism to lock the tubing in place. Be
careful not to damage your tubing as you unpack it.
NOTE!
Make sure to remove any plugs before attempting to insert tubing.
Plug
Collet
Fitting
Release Tubing/Plugs
Push and hold the Collet in to release the lock
while pulling out on the Tube/Plug.
NOTE! Collet mu󰎤 be held down while
pulling up on the tube to release the tube.
Hold
Down
NOTE! Once connected,
make sure to check
tubing is secure.

6
Feed Water Adapter Valve
NOTE!
If your Cold Water Valve is too old or weak to connect
to directly Option A you can connect at the top of the
line where the faucet connects Option B (if applicable,
some sinks do not have this connection point).
CAUTION!
The water supply to the unit MUST be from
the COLD WATER LINE. Using HOT WATER will
severely damage your RO Sy󰎣em.
Do Not Connect To
Hot Water Line!
NOTE!
On single-handle faucets the hot water may
have to be turned o to prevent hot water
crossover (only during your r󰍰 in󰍰allation).
If water 󰍰ill continues to come out of the faucet with
the Cold Water Valve turned o, then the main water
supply mu󰍰 be turned o as well.
2. Locate the Cold Water Valve underneath the sink
and turn it o completely. Next, open the cold water
handle on your sink to release pressure by expelling
any exi󰍰ing water. Check to make sure the water has
󰍰opped owing completely before proceeding.
1. Fir󰍰 you will assemble the feed water adapter. Wrap
the threading of the smaller portion of the adapter
(with the red handle) with 10-14 wraps of teon tape.
Then screw the smaller portion of the adapter into the
side of the larger portion as shown.
Hot Water Line
Cold Water Line
A
B
Teon Tape

7
3. The Feed Water Adapter Valve can be used 1/2” feed line plumbing. If your feed line is another size
you will need an adapter for setup.
Next, use an adju󰍰able wrench to secure the Adapter Valve either directly to the Cold Water Valve
Option A or further up in the line before the faucet Option B (if applicable).
Make sure your Adapter Valve is in the closed position when in󰍰alling.
Using the Feed Water Adapter Valve
During in󰍰allation leave your Feed Water Adapter Valve in the CLOSED position until Sy󰍰em Startup.
The Feed Water Adapter Valve controls all water coming into your RO Sy󰍰em. If for any reason you need to
󰍰op incoming water turn the Feed Water Adapter Valve to the CLOSED position. Always turn this valve o
before replacing lters, if a leak is discovered, or when shutting down the sy󰍰em.
CLOSED CLOSED OPEN
WARNING!
INCOMING WATER PRESSURE
SHOULD NOT EXCEED 100 PSI
NOTE!
Do Not Use Teon Tape!
Use your wrench to tighten the connection, be careful not to over tighten.
1/2” Connection

8
OK
Mount Drain Saddle
at either location
Drain Saddle
The Drain Saddle is used to connect the Drain Line to a drain pipe under the sink, or other drain plumbing.
The Drain Saddle is designed to t around a 󰍰andard 1.5 inch OD (outer diameter) drain pipe.
NOTE! Adju󰍰able drain saddles are available upon reque󰍰 if the saddle does not t your pipe.
The Drain Saddle should always be in󰍰alled above (before) the P-Trap and on a 󰍰raight vertical or horizontal
section of pipe. To avoid clogging the drain line with debris do not in󰍰all the Drain Saddle after the drain
pipe meets a garbage disposal or dishwasher drain. The image below shows ideal Drain Saddle locations.
1. Once you have found where your Drain Saddle will go on the Drain Pipe make a mark for the opening
there with a marker or pencil.
2. Use your drill and 3/8 inch (9.525mm) drill bit to drill a hole at your mark. Be careful to drill through one
side of the pipe only and 󰍰abilize your pipes while drilling to avoid damaging them.
3. Find the half of the Drain Clamp with a hole in its center. Then remove the backing from the Foam Gasket
(the foam circle at the center of the Gasket is disposable). Make sure to align the Foam Gasket hole with the
Drain Clamp hole and 󰍰ick the adhesive side of the Gasket to the inner wall of the Drain Clamp half.
4. Take the half of the Drain Clamp without the Foam Gasket and insert a nut into the recess on each side.
5. Position both halves of the Drain Clamp on the drain pipe with the clamp’s opening aligned over the
drilled hole. The Foam Gasket will be between the drain clamp and the drilled hole. Push your 3/8 inch drill
bit through both holes (the Drain Clamp hole and the hole in the Drain Pipe) and remove to verify that the
clamp is properly aligned with the hole you drilled.
6. Secure the Drain Clamp halves together in place on the Drain Pipe. Screw the bolts through the Drain
Clamp half with the Foam Gasket and into the half you in󰍰alled the nuts. Do not over tighten. When
tightening bolts make sure there is equal space on both sides between the Drain Clamp halves.
X
WARNING!
Nut
Drain Line Tube
Foam Gasket
Drain
Clamp
Drain Pipe
3/8” Hole
Bolt
OK
OK
X
X
P-Trap
Garbage
Disposal
*Adju󰍰able drain saddles are available if the saddle does not t your pipe
Never mount here

9
Filter Housing Assembly
NOTE!
- The Sediment Filter will
be on the far right
- The 2 Carbon Block Filters
will be on the opposite
side.
Filter
Housing O-Ring
Filter Housing
Tighten Filter Housings
The housings may need little or no tightening. You can expect to make a quarter turn at mo󰎣.
The majority of sy󰎣ems will need no tightening. Be careful not to overtighten.
2. The RO Membrane cap is already on the sy󰍰em. To
make sure the cap is secure, tighten the RO Membrane
Housing Cap with the (smaller) membrane housing
wrench. DO NOT OVERTIGHTEN!
1. Finish tightening each prelter housing using the
(larger) lter housing wrench.

10
Water Storage Tank
If you are using a water 󰎣orage tank with this sy󰎣em you
will connect it here. If not you can skip this page.
1. Identify the 󰍰em tee on the inow side of the PAC lter and
remove the plug from the quick connect arm of the tee. (refer to
the Quick Connect Guide on Page 5).
2. Use 3/8” tubing to connect this tting to your water tank.
3. Keep the Tank Valve in the Closed Position until Sy󰍰em Startup.
NOTE! The Tank Valve only controls water leaving the Water Storage Tank. To 󰍰op all incoming
water use the Feed Water Adapter Valve.
Tank Connection
Point
Tank Connection
Point

11
Sy󰎣em Connections
You may have already completed some or all of these connections in previous 󰍰eps. Make sure to remove
any plugs before in󰍰alling Tubing. Use the provided Locking Clips to secure any Tubing connections.
A to B Connect the 3/8” tubing to the Feed Water Adapter Valve (point A), remove plug then connect to the
open inlet of the branch tee on the sediment lter (point B).
To connect tubing to the Feed Water Adapter Valve, r󰎣 remove the Lock Nut by unscrewing it
from the valve. You will then push the tubing over the ridge on the end of the valve. Then the lock
nut will go through the other end of the tube until you can screw it back onto the valve.
Drain
The drain line is this piece
coming o of the Membrane
Housing at the back of the
sy󰍰em.
Output
The outgoing ow line is
this elbow coming o of the
PAC. This delivers Pure Water
Outow to your desired source.
Use the provided tubing
to direct your drain ow to
your desired location.
You can direct the drainage
into a drain saddle on a
sink pipe, into a oor drain,
or another option. that will
allow for unre󰍰ricted water
ow.
This can be connected to a
faucet or whatever else you
need to supply with your pure
RO water.
NOTE! If you are using a
tank, this is not where you
connect the tank
Drain
Line
A
B
Lock Nut
Pure
Water

12
Sy󰎣em Startup
Sy󰎣em Maintenance
NOTE! Do not drink water from your new sy󰎣em until you have completed Sy󰎣em Startup. The
ushing process is needed for your lters to begin working.
NOTE! Do not send water through any appliance until ushing is complete, carbon nes ushed
during 󰎣artup will clog appliances.
1. [SKIP IF NOT USING A TANK] Turn the Tank Valve to the Closed position.
2. Open the water supply to the RO Sy󰏭em (use Cold Water Supply and Feed Water Adapter Valve refer to
pages 6 and 7) (Make sure the main water supply is also on)
3. Open your sy󰏭em’s pure water outow and wait up to 10 minutes for water to 󰏭art owing. Let the
water ow for 30 minutes. [if your outow is connected to an appliance in󰏭ead of a faucet remove the line
from the appliance and allow water to ow into a bucket or drain]
4. Stop your outow (by either closing the faucet handle or closing the outow line) and wait 10-15
minutes for pressure to build. Then carefully check your RO Sy󰏭em for any leaks. Feel or visually inspect
every connection point for leaks. If a leak occurs, turn the Feed Water Adapter Valve OFF.
[If not using a tank simply let pure water ow for 30 minutes, then proceed to 󰏭ep 12]
[SKIP 5-11 IF NOT USING A TANK]
5. Turn the Tank Valve to the Open position.
6. Allow the Water Storage Tank to ll completely (the time will vary depending on the size of your tank
and your incoming water quality).
7. Flush the sy󰏭em by opening pure water outow until the water in your water 󰏭orage tank is completely
emptied and the ow is reduced to a trickle or 󰏭ops (about 1-5 minutes).
8. Stop your pure water outow and allow the Tank to ll again.
9. Repeat 󰏭eps 6-8 again. Occasionally check for leaks during this time
10. After the 2nd tank is lled you may drink the water.
11. Check for leaks daily during the 1󰎣 week of use and periodically thereafter.
NOTE! You may notice that the water has a milky color during the 1󰏭 week. This is an indication of air
bubbles in the water. This is normal during this period and the water is safe to drink.
These recommendations are intended for maximum eciency of your Commercial RO Sy󰍰em.
Filter and RO Membrane Storage
- Store unopened lters in an airtight container to prevent them from absorbing air. This prolongs the
shelf life of the lters and avoids any possible odors or contamination from the air.
-Store in a cool, dry, dark place (avoid heat and moi󰍰ure contamination).Using this method it is okay
to 󰍰ore lters for several years.
Extended Sy󰎣em Non-Use
- If you will not be using the RO Sy󰍰em for two weeks or more you will need to follow the “Vacation
Mode” guide on page 16.

13
Filter Change In󰎣ructions
This Commercial RO Sy󰍰em contains Filters that mu󰍰 be replaced at regular intervals to maintain proper
performance. Use only authentic Express Water lters.
How to Change the SED and 2 ACB’s (Prelters)
(Recommended about every 6 months, depending on water use)
1. You will need a clean cloth, dish soap, and appropriate Sediment and
Carbon Block Filters. (We also recommend a bin large enough for the
sy󰏭em to sit in. The sy󰏭em will release water when it is disassembled.)
2. Turn o the Cold Water Supply connected to the RO Sy󰏭em (refer to
page 6), the Feed Water Adapter Valve (page 7), and the Tank Valve [if you
are using a tank]. Then open your pure water outow to release pressure,
close outow when the ow of water 󰏭ops on its own.
3. Place the RO Sy󰏭em in the bin and unscrew the 3 Prelter Housings using the Filter Housing Wrench.
Remove old lters and dispose of them.
4. Wash the Prelter Housings with dish soap then proceed to rinse until all soap is removed.
5. Ensure that your hands are washed clean before unwrapping the new lters. After unwrapping, place
the new lters inside their correct housings (refer to page 9). Make sure each Housing has an O-Ring rm-
ly in place in the Housing’s lower groove (ju󰏭 below the threading).
6. Tighten the Prelter Housings using the Filter Housing Wrench. Do not overtighten. If these are the only
lters you are replacing continue to the Re󰏭arting the Sy󰏭em section on Page 14.
How to Change the RO Membrane
(Recommended about every 6 months to 1 year.
Lifespan varies based on quality of incoming water.)
NOTE! Make sure you have shut down the
RO Sy󰎣em (Step 2 in the above section).
1. Open the RO Membrane Housing by unscrewing the cap. Pull out the RO Membrane with a pair of
pliers. Be sure to note which side is the front and which side is the back.
2. Wash out the RO Membrane Housing. In󰏭all the new RO Membrane in the Housing in the correct
direction you noted earlier. Make sure to push the Membrane in rmly, then close the Housing by
tightening the cap with your hand. If this is the only/la󰏭 lter you are replacing continue to the Re󰏭arting
the Sy󰏭em section on Page 14.
SED
Make sure the O-Ring is in place before
you tighten the Membrane Housing Cap
How to Change the Inline Po󰎣 Activated Carbon Filter
(Recommended about once a year)
NOTE! Make sure you have shut down the RO Sy󰎣em
(Step 2 in the Prelters section).
1. Fir󰍰 disconnect the Male Elbow and Male Tee from the sides of the Po󰍰 Activated Carbon Filter.
2. Remove the old teon tape from the Male Elbow and Male Tee and apply 6-8 rounds of new teon tape,
then screw these ttings into your new Po󰍰 Activated Carbon Filter
3. Note the orientation of the old lter and it’s connection points, in󰍰all the new lter in the same orientation.
Remove the old lter from the holding clips and discard. Next, insert the correct tubing into the same
points as the old lter (refer to the Sy󰍰em Diagram on Page 3). If this is the only/la󰍰 lter you are replacing,
continue to the Re󰍰arting the Sy󰍰em section on 14.
ACB ACB

14
Re󰎣arting The Sy󰎣em
1. Fully open the Feed Water Adapter Valve, Cold Water Supply, and the Tank Valve [if you are using a
tank].
[If not using a tank simply let pure water ow for 15 minutes]
[SKIP 2-5 IF NOT USING A TANK]
2. Open the Pure Water Outow and fully empty the tank before turning your outow o.
3. Let the sy󰏭em rell with water (the time will vary depending on the size of your tank and your incoming
water quality). You can open your Pure Water Outow briey to release any air trapped inside the sy󰏭em
while it’s lling. (Be sure to check for new leaks during the r󰏭 24 hours after re󰏭arting)
4. After the Water Storage Tank has lled CLOSE the Feed Water Adapter Valve and drain the entire sy󰏭em
by opening your Pure Water Outow until water ow 󰏭ops. Then 󰏭op your outow.
5. Repeat 󰏭eps 3 and 4 again to fully ush the sy󰏭em.
NOTE! If the RO Sy󰏭em is connected to an appliance do not drain the sy󰏭em through these devices. The
excess carbon nes from the new carbon lter can clog or damage your appliance.
(Recommended Once a Year)
1. Before you begin you will need a new Sediment Filter, 2 Carbon Block Filters, RO Membrane, Po󰏭
Activated Carbon Filter, Filter Housing Wrench, and a container to mix water and bleach. We also
sugge󰏭 using a bin large enough for the sy󰏭em to sit in (the sy󰏭em will release a lot of water when it is
disassembled).
2. Close any incoming water (Feed Water Adapter Valve page 7).
3. Open pure water outow and drain the sy󰏭em completely (wait until water ow 󰏭ops completely), then
close the outow.
4. Use the Filter Housing Wrench to open the Filter Housings, then remove and dispose of ONLY the
following lter cartridges:
Sediment Filter
2 Carbon Block Filters
RO Membrane
NOTE! Leave the Inline Carbon Filter in place! You will replace it after sanitizing the sy󰎣em.
5. Mix 1 gallon of water with 2 tbsp of household bleach. Do not add bleach directly to the lter housing.
6. Fill up the Prelter Housings (Sediment and the 2 Carbon Block Housings) with your mixed solution and
close the housings using your Filter Housing Wrench.
7. Open the incoming water to the sy󰏭em (Feed Water Adapter Valve page 10) and let it run for 10
minutes.
8. Open your Pure Water Outow and let it drain for 10 minutes.
9. Close the Pure Water Outow and wait for 10 minutes then open the Outow again and wait for it to
drain completely.
(If you smell bleach from your pure water outow repeat 󰎣eps 7-9)
10. You are now ready to replace all lters and re󰏭art your sy󰏭em. Please refer to page 13 for detailed
in󰏭ructions, ignore any additional sanitation 󰏭eps therein.
How to Sanitize your RO Sy󰎣em