Clean Water Systems Pro-OX 7800 Installation manual

Clean Water Made Easy
www.cleanwaterstore.com
7800 Neutralizer Installation & Start-Up Guide
Thank you for purchasing a Clean Water System! With proper installation and a
little routine maintenance your system will be providing neutral pH water for
many years.
Please review this start-up guide entirely before beginning to install your system
and follow the steps outlined for best results.
CALCITE MEDIA CONTAINS DUST. USE PAPER MASK AND VENTILATE TO AVOID
BREATHING DUST.
Questions?
Call us toll-free: 1-888-600-5426 or 1-831-462-8500
Email us: [email protected]
See more information on our website: www.cleanwaterstore.com/resources

Clean Water Made Easy
www.cleanwaterstore.com
Table of Contents
Packing List ........................................................................................................................................................ 3
Neutralizer 1.0 cubic foot size................................................................................................................3
Neutralizer 1.5 cubic foot size................................................................................................................3
Neutralizer 2.0 cubic foot size................................................................................................................3
Pre-Installation .................................................................................................................................................. 4
Best Practices for Piping & Drain Installation ..................................................................................................... 4
How Your Neutralizer Works ............................................................................................................................. 5
Fig 1 - Neutralizer Filter Tank Water Flow .........................................................................................5
Fig 2 - Typical Neutralizer 7800 piping installation with ball valve and hose bib after the filter.........6
Fig 5: 7800 By-Pass and Pipe Connectors ..........................................................................................9
Initial Programming ......................................................................................................................................... 10
Starting the Initial Backwash............................................................................................................................ 11
How to Add Calcite Media to the 7800 Neutralizer Filter................................................................................. 12
When to Use Calcite Blends ............................................................................................................................. 13
How to Mix and Use Calcite Blends.................................................................................................................. 13
Neutralizers 1.0 Cubic Foot: use 90lbs Calcite and 10 lbs Corosex ......................................................13
Neutralizers 2.5 Cubic Foot: use 200 lbs Calcite and 20 lbs Corosex....................................................14
Troubleshooting the 7800 Neutralizer Filter ................................................................................................... 14
pH is Too High! ....................................................................................................................................14
pH is Too Low! .....................................................................................................................................14
White Spots on Fixtures and Glasses ...................................................................................................15
Backwash Flow Rate: ...........................................................................................................................15

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Packing List
Neutralizer 1.0 cubic foot size
7800 Backwash Control Valve w/ Bypass Assembly and Pipe connector kit (1”or ¾”)
10” x 44” filter tank with distributor tube
Blue media funnel for adding the Calcite media
12lbs. Filter gravel
1 cubic foot of Calcite media
*15 lbs. of Corosex included with Calcite-Corosex Blend systems
Neutralizer 1.5 cubic foot size
7800 Backwash Control Valve w/ Bypass Assembly and Pipe connector kit (1”or ¾”)
10” x 54” filter tank with distributor tube
Blue media funnel for adding the Calcite media
16lbs. Filter gravel
1.5 cubic foot of Calcite media
*15 lbs. of Corosex included with Calcite-Corosex Blend systems
Neutralizer 2.0 cubic foot size
7800 Backwash Control Valve w/ Bypass Assembly and Pipe connector kit (1”or ¾”)
12” x 48” filter tank with distributor tube
Blue media funnel for adding the Calcite media
20lbs. Filter gravel
2.0 cubic foot of Calcite media
*20 lbs. of Corosex included with Calcite-Corosex Blend systems

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Pre-Installation
1. Review your packing list and make sure you have received all the parts before beginning
installation.
2. If you are going to be turning off the water to the house and you have an electric water heater,
shut off the power to the water heater before beginning installation in case water heater is
accidentally drained.
3. Pick a suitable location for your filter system on a dry level spot where it won’t be exposed to
freezing temperatures. A minimum of 20 PSI is required. Maximum pressure is 90 PSI.
4. Get all of your plumbing parts together before beginning installation. Installation typically takes
3 to 5 hours. However, after installation the Neutralizer must be allowed to run through a
complete backwash and rinse cycle.
5. After the system is installed and running, your water may be discolored, or full of sediment or
rust, particularly if this is older or corroded piping. This typically clears up over a day or two.
Best Practices for Piping & Drain Installation
1. See typical installation on page 7 (Fig 2). The Neutralizer is installed after the pressure tank.
2. Make sure to connect the IN pipe to the 7800 inlet and the OUT pipe to the outlet (see Fig 2). As
you face the 7800 control from the front, the water enters on the right and exits on the left.
From the back (see Fig 2) the water enters on the left. The inlet and outlet are attached to the
bypass valve, which is marked with arrows as well.
3. Make sure there is a working gate or ball valve before the 7800 Neutralizer and also one after as
shown in Fig 2. The pressure gauges are optional and perhaps not necessary but a hose bib
(which is a faucet that you can attach a garden hose to) is strongly recommended after the
Neutralizer and before the second ball valve. This makes it easy to rinse your new Neutralizer
on start-up and gives you a place to test the water before it enters your household plumbing.
4. If you will be using copper piping, do not sweat the copper pipe directly on to the 7800 control
valve. Avoid heating up the 7800 control valve plastic with the torch.
5. If you have copper pipe before the Neutralizer and it is too difficult to change out, you may still
experience some copper staining of fixtures and have a copper residual in the water because
this section of pipe will still have acidic water flowing through it. We recommend PEX or PVC
pipe up to the Neutralizer and then copper after it, if you have copper plumbing.
6. You do not need unions to install your 7800 control valve. If you need to remove it, the 7800
has quick-release couplings that make it easy to put the Neutralizer on by-pass and remove the
filter system from the piping.

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7. The drain line tubing (not supplied) is connected to a drain from the drain outlet using flexible
½” ID tubing. Note that the drain can run up above the 7800 control and into a drain, it does
not have to drain down, as the filter backwashes under line pressure from your well pump. Most
plumbing codes require an air-gap connection, so that if your sewer or septic tank backs up, it
cannot cross connect with the drain tubing.
How Your Neutralizer Works
See Fig 1 below. In your Neutralizer the water enters the top of the tank (red arrows) and flows down
through the media and up the distributor tube (blue arrows). The downflow type Neutralizer raises the
pH of your water and can be backwashed, which cleans and re-classifies the Calcite, preventing
channeling. During backwash the flow of water is reversed and water flows down the distributor tube
and up through the media, lifting and expanding the Calcite media. During the backwash the Calcite is
cleaned by the action of the water flowing through it.
Fig 1 - Neutralizer Filter Tank Water Flow
Calcite Media

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Fig 2 - Typical Neutralizer 7800 piping installation with ball valve and hose
bib after the filter

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Fig 3: 7800 from the rear showing the inlet (left) and outlet (right) end-
connector fittings 3/4” or 1” NPT in Noryl plastic. Brass end-connectors are
also available for connecting to copper tubing.
Fig 4 7800 Bypass and Service Mode Positions

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Assembly and Installation Instructions
1. By hand, unscrew the entire 7800 control valve from the top of the tank if it was shipped
screwed on. Place distributor tube in tank if not already inside. If not already done, make sure
the blue cap is on top of distributor tube, or wrap the top of distributor tube with electrical or
duct tape. You do not want gravel or Calcite to go down the distributor tube.
2. Add the filter gravel that came with your order. You want the gravel to cover the bottom
distributor screen before adding the Calcite media.
3. Next add Calcite media. The tank will be about 2/3rds full of media. There may be a little calcite
left over from what was sent to you, however you ONLY need to fill it up 2/3rds. You can save
the leftovers for later when it is time to refill the calcite.
4. Remove cap or tape from top of distributor tube. Be careful not to pull up distributor tube
when removing cap or tape.
5. If possible at this point, fill the tank completely with water. This will allow the Neutralizer media
to settle and eliminate the need of “purging” the air out of the tank later.
6. Attach plastic top screen to the under-side of the 7800 control valve. It is a funnel-shaped
plastic screen that snaps on to the control valve and prevents resin from being backwashed out
to drain during the regeneration cycles.

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7. Add a small amount of silicone grease or vegetable cooking oil to the tank threads and screw on
7800 control valve carefully. Do not use pipe-joint compound, Teflon tape, or Vaseline or other
petroleum greases to lubricate tank threads.
8. See how the by-pass is connected. Note that Items 2 in Fig 5 below are the pipe connectors and
the other end is what gets attached to the control valve. Items 3 are the red clips that hold the
pipe connectors to the by-pass valve. Your 7800 is usually shipped in the by-pass position, as
in Figure 4.
Fig 5: 7800 By-Pass and Pipe Connectors
9. Lubricate the by-pass valve o-rings with some vegetable oil or silicone grease and connect the
bypass assembly to the 7800 control by sliding the bypass valve firmly into the body of the 7800.
Once bypass is in far enough, you will be able to insert the red connector clips.
10. Next lubricate the end-connectors (#2 in Fig 5) with some silicone grease or vegetable cooking
oil and insert them into the bypass valve and then insert the red clips (#3).
11. Note that the 7800 is usually shipped in the bypass position. There is a bypass valve knob on
both the inlet and the outlet. You can easily tell if it is in bypass because the two knobs will be
in line with each other (Fig 4). If the valve is in the Service position (Fig 5) the knobs will be
parallel to each other. Make sure both sides are in the by-pass position.
12. Do NOT remove the red clips in order to put the bypass valve in either bypass or service, it is not
necessary nor desired to remove the red clips on the bypass valve hand knobs.
13. Now install your water pipes to the 7800 bypass end connectors. Make sure inlet is installed to
the 'In" pipe connector on the bypass valve and outlet is on the “Out” connector.
14. Connect some flexible tubing from the drain connection on the 7800 control valve to a suitable
drain such as a septic tank or drain to a sewer. It is OK to run the drain line up and over the

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7800 Neutralizer up to 4 feet above the top of the tank. If the drain line will be more than 20
feet, use larger diameter tubing such as ¾” or 1”. Note that it is desirable to be able to run the
drain line into a bucket in order to test the backwash flow rate in the future. This is why hard
piping the drain line is discouraged: however, if you do use hard PVC piping for the drain line,
and you are able to remove the hard PVC drain piping and attach flexible tubing should you ever
desire for testing purposes, it is OK to use rigid PVC pipe for the drain. Make sure the drain
tubing is firmly clamped to the barbed fitting with a hose clamp to prevent leaks.
15. Plug your 7800 control valve into an outlet. After being plugged in, the screen may display
“WAITING PLEASE” while it finds the service position. By default, the control valve will be set to
work like a Water Softener, but that’s not correct for this application. So, next you will need to
program the system to work as a Neutralizer Filter. There are a few settings that must be
changed before the system can be put into service.
Initial Programming
1. Plug in your 7800 control valve to an outlet
2. From the display screen, press and hold the settings button for three seconds to access the
programming menu.
3. Set Time of Day –Use the up and down arrows to select the proper value. Once the proper
value is set, press the Settings button (Enter) to proceed to the next setting. Hitting the Manual
Regen button at any time will take you out of the programming and back to the main menu
4. Set Year - Use the up and down arrows to select the proper value. Once the proper value is set,
press the Settings button (Enter) to proceed to the next setting
5. Set Month - Use the up and down arrows to select the proper value. Once the proper value is
set, press the Settings button (Enter) to proceed to the next setting
6. Set Day - Use the up and down arrows to select the proper value. Once the proper value is set,
press the Settings button (Enter) to proceed to the next setting
7. Set Regen Days - This tells the Neutralizer filter how often to regenerate in days. It can be set for
any setting from 1 to 10, with 7 being the recommended common setting.
8. Gallons On/Off –Select Off to program it to be used as a neutralizer filter
9. Regen Time - Set the time of the night that you want the neutralizer filter to backwash. The
default time is 2:00 am. Adjust the time by pushing the up or down arrow if you want.
10. Programming Complete –If you need to go back and change anything, simply press and hold
the Settings button to go through the programming menu again.

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Starting the Initial Backwash
11. Now you are ready to turn on the water. Turn on the water and leave the Neutralizer filter on
bypass and check for leaks. Leave the ball valve after the neutralizer filter closed, so water is
still off to the house, but connect a garden hose and open up the hose bib after the neutralizer
filter and allow the water to run for several minutes. This important step clears out any foreign
material that may be in pipes from the installation. If you do not have a valve and hose bib
installed after the neutralizer filter, you will need to turn the water on inside the house to let
the water run. Use a bathtub or laundry sink or other fixture that does not have an aerator
screen.
12. Press and hold the Manual Regen button for three seconds which will start a manual backwash,
watch the display and wait until it starts counting down. Now unplug the power supply and
proceed to step 13.
13. Now you can slowly turn the bypass valve to the service position. You do NOT remove the red
clips on the bypass knobs in order to turn the bypass valves from the bypass to the service
position. First open the Inlet Side of the bypass valve. Second slowly open the Outlet Side of the
bypass until it is in the full service position. The 7800 bypass valve knobs are a little stiff, so you
can use Allen wrench placed in the holes to turn the knobs. Turn the bypass valve knobs in the
correct direction which is counter-clockwise as you face the bypass valve knobs.
14. There should be no neutralizer media coming out of the drain line, but the water may be cloudy
looking. At this point the neutralizer filter will be in a backwash cycle. The backwash takes 10
minutes. If the water slows down or stops during the first 10 minutes of backwash, press the
Manual Regen button to move the 7800 control to the next cycle, the Rinse cycle. Then repeat
the backwash and rinse after the rinse cycle is done, by pressing and holding the Manual Regen
button for three seconds again. If you have high water pressure you may need to turn on the
water slowly to the neutralizer filter at first to prevent some neutralizer fines from coming out
the backwash. However it is normal for some small amount of fines to come out during the
backwash, although you do not want to see a large amount of media coming out, which would
mean you have very high water pressure, or the drain flow control for the 7800 is missing.
15. If possible verify that the backwash flow rate. You can easily run the drain hose to a bucket and
using a watch verify the flow rate in gallons per minute. For example, if the backwash fills a 5
gallon bucket in 30 seconds, you have 10 gallons per minute or 10 GPM. An adequate
backwash is critical to properly clean the Neutralizer media and prevent it from cementing
together.
1.0 Cubic Foot Model: 7 GPM minimum 10 GPM recommended
1.5 Cubic Foot Model: 8 GPM minimum 10 GPM recommended
2.0 Cubic Foot Model: 10 GPM minimum 12 GPM recommended

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2.5 Cubic Foot Model: 13.0 GPM minimum 15 GPM recommended
16. The next cycle is the Rinse cycle and this runs for 6 to 8 minutes. After the backwash, the 7800
will automatically advance to the rinse cycle.
17. After the neutralizer filter has gone through the backwash and rinse, press and hold the Manual
Regen button for three seconds and repeat the backwash and rinse. This is the same procedure
that needs to be done each time you add neutralizer media in the future, that is, the Neutralizer
media must be thoroughly backwashed and rinsed.
How to Add Calcite Media to the 7800 Neutralizer Filter
CALCITE MEDIA CONTAINS DUST. USE PAPER MASK OR VENTILATE TO AVOID BREATHING DUST.
1. Begin by putting the neutralizer filter on bypass, or turning the water pressure off before the
neutralizer.
2. Initiate a manual backwash cycle. Since it is on bypass, this will relieve the pressure inside the
control valve so you safely unscrew the Media Fill Plug located on top of the neutralizer tank.
3. Unplug the control valve cord from the wall outlet.
4. Unscrew the media fill plug with channel locks or pliers, and using a tube or hosesiphon 2 to 3
gallons of water out of the filter tank. If you don't siphon water out before adding filter media,
water will flow out the fill plug hole and onto the floor. If water on the floor is OK, then you do
not have to siphon water out first before pouring Calcite media into the fill plug hole.
5. Add neutralizer filter media until the tank is 2/3rds full. Do not over-fill; be sure to leave at least
12" of free space above the media to allow room for it to expand during a backwash.
6. Put the top fill plug back in. You can lubricate the threads with some vegetable oil or silicone
grease, but do not use Teflon tape or plumbing grease.
7. Plug the control valve back in and press the Manual Regen button so the 7800 control is in a
backwash cycle.
8. Turn on the bypass valve - slowly at first - back to the service position (if it is in "service" this
means it is in the proper position for filtering and neutralizing).
9. Allow the system to go through a complete backwash and rinse cycle. Repeat this backwash and
rinse cycle by starting another manual cycle, so the neutralizer is thoroughly backwashed and
rinsed before going back into service.

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When to Use Calcite Blends
If the water pH is less than 6.0, Calcite alone may not be enough to bring the pH up to the desired range
of 7.0 to 7.8. In this case, a blend of Calcite and Corosex should be used. Calcite is a calcium media
consisting of calcium carbonate and will raise the pH slowly. Calcite will not raise the pH much over 7.2.
Corosex is a natural mineral media consisting of magnesium oxide. It reacts much faster and raises the
pH much higher than Calcite alone.
Corosex is almost never used alone as it will raise the pH too high and in some cases will over-correct
and create a highly basic (high pH) condition. It can also cement together like concrete in the neutralizer
tank if you add too much and there is not sufficient backwash.
For most residential well applications, a 90% Calcite and 10% Corosex is best. However, in some cases
an 80%/20% mix or even a 70%/30% is used. It is always better to start with a 90%/10% mix at first as
this solves the majority of low pH problems in the range of 4.5 to 5.9.
For a pH of 6.0 to 6.9 use Calcite alone.
For a pH of 5.0 to 6.0 use a blend of Calcite and Corosex usually 90% Calcite and 10% Corosex, or more
Corosex as needed if the pH is less than 5.0.
How to Mix and Use Calcite Blends
The Calcite and Corosex media is sold and shipped in separate boxes. It does not have to be completely
blended together to use as it will mix during the backwash and rinse cycles. Still, when you are adding
the Calcite and Corosex it is better to blend it lightly in a 5 gallon bucket and then add it. You can also
add some Calcite and then add some Corosex as you are filling the tank. Do not fill tank more than
about 2/3rds full.
Note the following:
Calcite is shipped in 50 lb boxes and one box of Calcite is equal to 0.55 cu ft.
Corosex is shipped in 10 lb boxes and 1 box is equal to 0.13 cu ft.
50 lbs of Calcite = 0.55 cubic foot of media
50 lbs of Corosex = 0.66 cubic foot of media
Neutralizers 1.0 Cubic Foot: use 90lbs Calcite and 10 lbs Corosex
Your new 1.0 CF neutralizer includes:
Calcite 100 lbs (2 50-lb boxes) 1.1 cu ft

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Corosex 10 lbs (1 10 lb boxes) .13 cu ft
Neutralizers 1.5 Cubic Foot:use 150 lbs Calcite and 10lbs Corosex
Your new 1.5 Cubic Foot Neutralizer Blend filter includes:
Calcite 150 lbs (3 50-lb boxes) 1.65 cu ft
Corosex 10 lbs (1 10 lb boxes) .13 cu ft
Neutralizers 2.0 Cubic Foot: use 150 lbs Calcite and 20lbs Corosex
Your new 2.0 Cubic foot Neutralizer Blend filter includes:
Calcite150 lbs (3 50-lb boxes) 1.65 cu ft
Corosex20 lbs (2 10 lb boxes) .26 cu ft
Neutralizers 2.5 Cubic Foot: use 200 lbs Calcite and 20 lbs Corosex
Your new 2.5 Cubic Foot Neutralizer Blend filter includes:
Calcite 200 lbs (4 50-lb boxes) 2.2 cu ft
Corosex 20 lbs (2 10 lb boxes) .26 cu ft
Troubleshooting the 7800 Neutralizer Filter
pH is Too High!
If the pH after your neutralizer is greater than 8.5, your pH kit may turn the color of the reagent, a
purple color. This is nothing to be alarmed about. In some cases, too much Corosex added to the
neutralizer-Calcite-Corosex blend can cause this problem; it almost never happens with Calcite only
systems. If this happens, set the backwash cycle frequency to every night for a couple of weeks, which
will cause the media to be washed more thoroughly and use up the excess Corosex. Alternatively, you
can manually backwash it several times on a given day, etc. Secondly, you can open up the bypass
valves slightly, and allow some untreated water to lower the pH by blending in some lower pH water.
When you go to add more media in 6 to 12 months, just add less Corosex.
pH is Too Low!
This can happen if the water entering the neutralizer has a pH less than 6.0. Generally the water after
your neutralizer should have a pH of 7.0, and the pH reagent in your pH test kit should turn a light green
to darker green depending on the pH. Give your neutralizer some time, and after several weeks, if the
pH is still coming out less than 7 and the test reagent is yellowish in color, you may need to add some
Corosex to the neutralizer tank to raise the pH. Contact our office if you don’t have any Corosex on

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hand and/or you ordered a Calcite-only system. The Calcite-only systems work best if your water’s pH
is between 6 and 6.9 and are desirable as they add fewer minerals to the water, so it is best to start out
with a Calcite only system if your pH is 6.0 to 6.9. This works for a majority of our customers.
White Spots on Fixtures and Glasses
Calcite neutralizers work by adding natural calcium minerals to the water. Many natural well or spring
waters that are acidic (with a pH of less than 7.0) are low in minerals and are considered “soft” water.
This lack of natural buffering calcium minerals contribute to the corrosive nature of these waters. After
the water has passed through the neutralizer, the water will be higher in calcium and “harder” but
typically not hard enough to warrant a water softener, which removes calcium hardness.
It is more common to see some white film or spotting on fixtures if you are using a blend of Calcite and
Corosex. In some cases, it might be that too much Corosex was used originally in the mix of media.
If you are starting to see white spots and films on surfaces after the neutralizer has been installed, you
might want to take these steps:
Set the backwash frequency for every 3 days for a couple of months.
Check the hardness level before and after. If your hardness is higher than 5 grains per gallon after the
neutralizer, your neutralizer may be adding more minerals than is needed, and you can open up the
bypass valves a slight amount in order to blend in some untreated water.
Check the pH before and after. You only need the pH to be in the 7.0 to 7.5 range. If the pH is higher
than that, you may be adding more minerals than is necessary.
Backwash Flow Rate:
One problem that may occur if you do not have enough backwash flow rate to properly clean the
Neutralizer filter is a drop in water pressure, due to fouling of the media from rust or sediment. You can
verify the backwash flow rate by running the drain line into a bucket and timing it when the 7800 is in
Cycle 1 or backwash. A 1.0 or 1.5 cubic foot system should have 5 gallons per minute and a 2.5 cubic
foot system should have 10 gallons per minute of backwash.
How To Remove Media From Control Head
Sometimes, when doing the Initial Backwash, the media gets lifted up into the control head. You can tell
this happened because you will have little or no flow, either going out to drain while in the backwash
positon, or when in the service positon.
To remove media from a control head, do the following:
1) Put the Inlet Bypass in the Closed position.
2) From the Service Mode, initiate a manual regeneration, by pressing and holding the regen button
(button on far left).

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3) The valve will advance to the BW (backwash) position, and start counting down. Press the Regen
button again, and wait for the valve to advance and stop at the Rapid Rinse (RR) position.
4) With the valve in the RR position, open and close the Inlet Bypass valve several times. After the third
or fourth time, leave it in the open position and check the drain line- do you have a good solid flow?
90% of the time, the answer is yes, but sometimes, even after opening and closing the valve many times,
you still don’t have good flow… But, in either case (good or no flow), continue…
5) With the Inlet Valve OFF, Advance the valve back to Service position again, and again press and hold
the Regen button, we are putting the valve back to the Backwash position.
6) Open the Inlet valve just enough so you can hear the water passing thru the valve- you should notice
a corresponding slow flow out of the drain line. After a minute, if there are no air bubbles present, open
the valve about another quarter inch- again, you should see a corresponding increase in the flow… And
you will continue until the valve is full open.
IMPORTANT:
Any time that you are in the Backwash or Rapid Rinse position, you may need to unplug the power- this
will hold the valve in its current position, so it doesn’t ‘time out’ and go to the next position. When you
plug the valve back in, after a minute it will return to where it was when you unplugged it (i.e. 2:32
remaining in BW). Understand, it is not possible to jam media into the head while in Rapid Rinse, or
Service, just in the Backwash, when the flow direction is reversed.
What you are trying to accomplish, after you have pushed the media back in to the tank in the Rapid
Rinse position, is to get the Inlet valve all the way open in the Backwash position, without it jamming
media back in the head, and this is the part where you have to go slow, open up the Inlet valve a little
bit at a time and let it run for a few minutes- this is why you may have to unplug it- and then, once you
have done that, finally, do one more backwash, starting with the Inlet valve open, just as it will be when
it does it automatically at night. Once it does that successfully, you are done.