Clean Water Systems 7500-M Installation manual

7500-M 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.
INSTALL INDOORS. NOT FOR OUTDOOR USE. PROTECT FROM WEATHER.
Note: Your filter tank base is not glued to the bottom of your
tank. Occasionally tank bases will become crooked during shipment.
If you find that that your tank does not sit level on the floor, you can
easily adjust it by holding the empty tank and rapping it on a
concrete or solid floor once or twice in order to level it.
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

Table of Contents
Packing List.................................................................................................................................................... 3
Pre‐Installation.............................................................................................................................................. 4
Best Practices for Piping & Drain Installation Fig 1....................................................................................... 4
Installation of Your System On Copper or Metal Piping Systems................................................................. 5
How Your Neutralizer Works Fig 2................................................................................................................ 6
Fig 3. Typical Neutralizer 7500 piping installation on well water ................................................................ 7
Assembly and Installation Instructions ......................................................................................................... 8
Programming Your Valve and Setting Time and Days for Backwash............................................................ 9
Initial Backwash .......................................................................................................................................... 12
Maintenance ............................................................................................................................................... 13
Troubleshooting the 7500 Neutralizer Filter .............................................................................................. 13
Backwash Flow Rate................................................................................................................................ 13
What To Do If Your Filter Tank Does Not Sit Level On the Floor ............................................................ 13
pH is Too High!........................................................................................................................................ 13
pH is Too Low!......................................................................................................................................... 14
White Spots on Fixtures and Glasses...................................................................................................... 14
Manufacturer Troubleshooting Guide ....................................................................................................15

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Packing List
Neutralizer 1.0 cubic foot size
7500 Backwash Control Valve
10” x 44” filter tank with distributor tube
Blue or black funnel for adding media first time
12 lbs. Filter gravel + 1 cubic foot of Calcite media
Neutralizer 1.5 cubic foot size
7500 Backwash Control Valve
10” x 54” filter tank with distributor tube
Blue or black funnel for adding media first time
16 lbs. Filter gravel + 1.5 cubic feet of Calcite media
Neutralizer 2.0 cubic foot size
7500 Backwash Control Valve
12” x 52” filter tank with distributor tube
Blue or black funnel for adding media first time
20 lbs. Filter gravel + 2 cubic feet of Calcite media
Neutralizer 2.5 cubic foot size
7500 Backwash Control Valve
13” x 54” filter tank with distributor tube
16 lbs. Filter gravel + 2.5 cubic foot of Calcite media
Blue or black funnel for adding media first time
*If you ordered the 90/10 Calcite/Corosex blend, you should also have 10 lbs of Corosex, and if you
ordered the 80/20 Calcite/Corosex blend then you should have 20 lbs of Corosex, although the weights
may not be exact.

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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 Fig 1
1. See typical installation on page 7 (Fig 3). The Neutralizer is installed after the pressure tank.
2. Install a 3 valve bypass using PVC or stainless steel balls vales (not brass)

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3. Make sure to connect the IN pipe to the 7500 inlet and the OUT pipe to the outlet. As you face
the 7500 control from the front, the water enters on the right and exits on the left.
4. Install the external DLFC (drain line flow) on the drain outlet port. Make sure the flow direction
is correct per the flow direction arrow.
5. Pre‐make your fittings using thread tape on all threaded fittings EXCEPT the three shipped with
your unit going into the valve head. These seal using the blue seal. Make sure not to overtighten
these fittings into the valve as you will crack the valve body. CAUTION NO LUBE OR THREAD
TAPE IS NEEDED ON THE FITTINGS.
6. Make sure there is a working gate or ball valve before the 7500 Neutralizer and also one after as
shown in Fig 2. The pressure gauges are optional 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.
7. If you will be using copper piping, do not sweat the copper pipe directly on to the 7500 control
valve. Avoid heating up the 7500 control valve plastic with the torch.
8. 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.
9. 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 7500 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.
Installation of Your System On Copper or Metal Piping Systems
If your new neutralizer is to be installed in a metal plumbing system, i.e. copper or galvanized steel
pipe, the plastic components of the system will interrupt the electrical continuity of the plumbing
system.
Some homes may have been built in accordance with building codes, which encouraged the
grounding of electrical appliances through the plumbing system.
Consequently, the installation of a bypass consisting of the same material as the existing plumbing,
or a grounded "jumper wire" bridging the equipment and reestablishing the contiguous conductive
nature of the plumbing system must be installed prior to your systems use. Wire clamps and wire
can be purchased at any home depot or hardware store.

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How Your Neutralizer
Works Fig 2
In your Neutralizer, the water enters
the top of the tank and flows down
through the media and up the
distributor tube and out to the home
plumbing.
The calcite neutralizer media raises the
pH of your water as the water flows
through it.
Periodically (once or twice a week) the
neutralizer automatically backwashes
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.

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Fig 3. Typical Neutralizer 7500 piping installation on well water

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Assembly and Installation Instructions
1. Wrap the top of distributor tube with electrical or duct tape so that no gravel or Calcite will go
down the distributor tube when adding the media.
2. Add the filter gravel that came with your order. You will want the gravel to cover the bottom
distributor screen before adding the Calcite media.
3. If you received Corosex (also known as Flomag) in your shipment (used with pH’s below 6), you
can now mix it together with the Calcite before adding the blend into the tank. Mix together in a
bucket and add into the tank until it is 2/3rds full, do not fill past 2/3rds.
4. Next add the Calcite media or Calcite/Corosex blend. The tank will be about 2/3rds full of media.
Do not fill more than 2/3rds full, even if there is some left over. You can save that for later
5. Remove cap or tape from top of distributor tube. Be careful not to pull up distributor tube
6. 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.
7. Attach plastic top screen to the under‐side of the 7500‐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. It may twist on clockwise or counterclockwise.

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8. Add a small amount of silicone grease to the tank threads and screw on 7500 control valve
carefully. Do not use pipe‐joint compound, vegetable oil, Teflon tape, or Vaseline or other
petroleum greases to lubricate tank threads.
9. DO NOT USE VEGETABLE OIL OR PETROLEUM GREASE ON ANY PART OF THE 7500 CONTROL
VALVE. O‐rings are OK to lubricate but not the main tank threads.
10. Connect some flexible tubing from the drain connection on the 7500 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 7500
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”.
11. 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.
Programming Your Valve and Setting Time and Days for Backwash
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. Plug in the control valve and begin
the programming instructions.

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*IMPORTANT*: Before any operation, the valve menu must be unlocked. If the button lock
indicator is displayed, press and hold both the Up and Down buttons for 5 seconds. A sound will
indicate the menu is unlocked. The menu will re‐lock automatically after 1 minute of inactivity.
1. To begin programming your valve, unlock the menu and press the Menu/Confirm button. This
puts the valve into program display mode, indicated by the Enquiry/Setting icon being
displayed. The Enquiry/Setting icon is displayed whenever you are changing the parameter
of a programming mode.
2. The sequence of programming modes is shown in the diagram below. To switch between
modes, press the up or down button according to which direction your mode is. The modes
can only be changed when the Enquiry/Setting button is displayed and you are not currently
modifying any other parameter.
1) To change the Time of Day:
Change programming mode to Time of Day ( [00:00] and time of day icon displayed ). The hour
and Enquiry/Setting icon will be flashing. Change the hour value with the Up/Down buttons,
then press Menu/Confirm to move onto the minute value. Change this value with Up/Down,
and press Menu/Confirm again to confirm the time.
2) To change the Rinsing Time:
The rinsing time is the hour of day that the system will turn on to perform its function. We
recommend setting the system to backwash at 2 AM [02:00], or any time that it is unlikely any
water will be used. Note the valve uses the 24‐hour clock.
The default setting is [02:00]. The max setting is [23:59]. To change, set the programming mode
to Rinsing Time ( [00:00] ). Press the Menu/Confirm button and use the Up/Down buttons to
change the hour value. Press the Menu/Confirm button again and change the minute value
using the Up/Down buttons. Finally, press Menu/Confirm to confirm your rinse time.
3) To change the Rinsing Frequency:
The rinsing frequency is how many times the system will backwash and rinse per service.

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This should be left at its default, [F-00]. This will have the system only backwash and rinse once
per service.
4) To change the Service Days:
Service days indicates how often the system will operate and backwash/rinse. The
recommended setting for a neutralizer filter is 7 days.
To set this, change the programming mode to Service Days ( [1‐03D] ). Press the Menu/Confirm
button and use the Up/Down buttons to set it to your desired amount. Press Menu/Confirm to
confirm your input.
5) To change the Backwash Time:
The backwash time is the amount of time (in minutes) that the system will backwash for.
For a neutralizer filter, set the backwash time to 10 minutes [2-10:00]. To change this, set the
programming mode to Backwash Time ( [2‐10:00] and backwash icon displayed ). Press the
Menu/Confirm button and use the Up/Down buttons to set it to [2-10:00]. Press Menu/Confirm
to confirm the backwash time.
6) To change the Fast Rinse Time:
The fast rinse time is the amount of time (in minutes) that the system will rinse for.
For a neutralizer filter, set the fast rinse time to 6 minutes [3-06:00]. To change this, set the
programming mode to Fast Rinse Time ( [3‐10:00] and fast rinse icon displayed ). Press the
Menu/Confirm button and use the Up/Down buttons to set it to [3-06:00]. Press Menu/Confirm
to confirm the fast rinse time.
7) To change the Signal Output Mode
The signal output mode refers to when the system receives external function.
Leave this at its default, [b-01].
After configuring, press the Manual/Return button to exit programming mode.

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Initial Backwash
1After programming, the system must be run through an initial backwash.
2Close inlet ball valve and outlet ball valve and open the bypass valve.
3Press the Manual/Return button to enter the backwashing cycle. When the backwash icon
is displayed, slowly open the inlet valve B to a quarter position to make the water flow into
the resin tank; you should be able to hear air escaping from the drain pipeline.
4After all the air is out of the pipeline, open inlet valve B and clean the foreign materials in
the tank until the water is clean.
5If possible verify that the backwash flow corresponds with the size of your system below.
You can easily run the drain hose to a bucket and using a watch verify the flow rate in
gallons per minute. An adequate backwash is critical to properly clean the Calcite media and
prevent it from cementing together.
0.75 CF
5 GPM
1.0 CF
5 GPM
1.5 CF
5 GPM
2.0 CF
8 GPM
2.5 CF
10 GPM
3.0 CF
12 GPM
6After the backwash, the system will automatically go into the fast rinse stage. Both stages
will last as long as you have programmed the valve for. The control valve will return to
service status (indicated by the up flowing meter on the left) after the backwash and rinse
are complete.
7Repeat the Regeneration (backwash and rapid rinse cycle) step 3‐4 more times until you see
clear water through the drain line or your hose bib. Once you have tested your PH at the
hose bib and it is within range, You Can open up the outlet valve to your house.
Congratulations, you are done setting up your valve!

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Maintenance
Check level of neutralizer media in the tank by shining a flashlight from behind. When new or recently
serviced the media should be about 2/3rds full in the tank.
When level of media drops to 50% or less add more neutralizer media to bring back up to 2/3rds full and
then backwash and rinse 2 ‐3 times to clean the new media.
Using your pH test kit, check pH before and after the neutralizer.
Troubleshooting the 7500 Neutralizer Filter
Backwash Flow Rate
One problem that may occur is if you do not have enough backwash flow rate to properly clean
the Neutralizer filter. You can verify the backwash flow rate by running the drain line into a
bucket and timing it when the 7500 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.
In some cases, the 7500 may not be programmed correctly. See the 7500 service manual for
instructions on how to access the master programming.
What To Do If Your Filter Tank Does Not Sit Level On the Floor
Your black filter tank base is not glued to the bottom of your tank. Occasionally tank bases will
become crooked during shipment. If you find that that your tank does not sit level on the floor,
you can easily adjust it by holding the empty tank and rapping it on a concrete or solid floor
once or twice in order to level it.
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.

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Alternatively, you can manually backwash it several times on a given day, etc. Secondly, you
can open up the bypass valve slightly, and allow some untreated water to lower the pH by
blending in some of the lower pH water. In 6 – 12 months or next service 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 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 not hard enough to warrant a water softener, which removes hardness.
It is more common to see some white film or spotting on fixtures if you are using a blend of
Calcite and Corosex. 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.

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Manufacturer Troubleshooting Guide

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