Superior Water Filtration and Proven Hard Water Scale Prevention
Phone 800-549-7885 | Text 858-688-1646 | Email support@scalestopplus.com

Installation Guide

Residential Dual Tank Systems

To be installed by a licensed, professional, experienced plumber or installer.


Installation Support

To ensure that your new ScaleStop Plus water filtration system is properly installed, we offer free installation technical support by a master installer, Shannon Chisholm.

When you schedule the installation, text message Shannon Chisholm and let him know the date and time of the installation. At the start of the installation, have your plumber or installer call Shannon Chisholm for installation support.

⚠️ Important It is crucial that your plumber or installer consult with our master installer during installation. Failure to do so will not activate the warranty.


⚠️ Cautions

  • Do not let the system freeze. Damage to the tanks may result.
  • System must be operated in a vertical position. Do not lay it down during operation. Always keep in the vertical position.
  • Bypass valves should be installed on every system to facilitate installation and service.
  • Observe all local plumbing and building codes when installing the system.

⚠️ Important The water filtration system must always remain upright during transportation, installation, and operation.


⚠️ Important Notes

General Precautions

  • Do not install this system where water is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
  • This system must be installed in an area that is not affected by extreme heat, cold or the elements. If the system is located outdoors, protect the unit from direct sunlight. The system cannot be installed outside if temperatures can reach below freezing (32 ℉).
  • The selected installation area must be adequate for easy service of all parts.
  • This system must be installed in accordance with all applicable state and local laws and regulations.
  • This system is designed to treat cold water only and can be installed on any cold water supply.

Safety Precautions

  • To prevent accident or injury, do not hoist the unit over your shoulder. Use a hand truck to transport the unit.
  • Do not lay the unit on its side during transportation and/or installation.
  • Wear safety glasses and work gloves during installation and service.

Test the Raw Water

  • If water contains iron, manganese or hydrogen sulfide, a separate iron removal system is suggested to be installed prior to the system. Consult with your dealer.

Installation Tips

Apply Plumber’s Grease on Fittings

Use plumber’s grease between metal-to-metal fittings, on O-Rings, and on lock nuts, for a better seal and to prevent water leaks. (Use a plumber’s grease that is rated for rubber O-Rings.)

Hand Tighten Lock Nuts

⚠️ Hand tighten lock nuts on Bypass Valves and Hoses. Do not use a wrench.

Open Valves Slowly

Always turn the water main valve, shut-off valve, and bypass valves slowly to gradually pressurize the system.


Dual Tank System Parts

The ScaleStop Plus water filtration systems with dual tanks include the parts shown below.

How do you distinguish between the Carbon Media Tank and the ScaleStop Media Tank? The Carbon Media Tank comes equipped with the Controller.

Carbon Media Tank Information
Equipment is limited to use at water pressures not to exceed 100 PSI and temperatures not to exceed 110℉.
Do not use on water that is has bacteria or is contaminated with coliform or e.coli.
Effectively removes chlorine, enhancing water taste, and eliminates odors.
Alleviates skin irritations and allergic reactions related to chlorine.
Allows you to enjoy showers without the harshness of chlorine.
A minimum of 20 pounds of water pressure is required for proper operation. The acceptable operating pressure is 15 psi - 100 psi (103 kPa - 689 kPa).

Water Filtration System Parts and Parts Supplied by Installer

In addition to the parts included with the ScaleStop Plus water filtration system, the installer will need to supply additional parts, such as the parts shown below.

Parts Supplied by Installer

The installer will need to supply additional parts during installation, such as the parts shown below.


Installation Overview

Fully Connected System in Non-Operational or Bypass Mode

The diagram below shows the completely connected water filtration system, but not yet operational.

Fully Connected System in Operational Mode

The diagram below shows the complete water filtration system when it is fully installed and operational.

In operational mode, all the valves are OPEN or ON. Especially note the direction of the Red Arrow Handles and .

Connections Review


Installation Examples

The Controller is plugged into the electrical outlet.

The drain line drains to outside the house.

A metal strap is used to secure the tanks.

Installation with Optional Microorganism Filter

Outside Installation in Covered Area

Outside Installation in Storage Cabinet


Step-by-Step Instructions

1. Select and Prepare Installation Site

A whole-house water filtration system is installed at the point where the source water comes into your house, so it can filter all the water that flows within your house.

Choose the location where the water filtration system will be installed.

The location where you will be installing the water filtration system should:

  • Be next to the water main valve
  • Have a nearby electrical outlet
  • Have access to a drain or to outside
  • Be inside in a covered area
  • Be a level, smooth surface

Clear the site where you will be placing the water filtration tanks.

⚠️ Caution It is highly recommended that the water filtration system be installed inside in a covered area. If the water filtration system is installed outside, it should be in a properly covered and protected area.

2. Place Water Filtration Tanks and Parts at Installation Site

Place the parts to be installed at the location site:

  • Carbon Media Tank
  • ScaleStop Media Tank
  • 2 Bypass Valves
  • 3 Connection hoses
  • Water line valves
  • Copper piping
  • Drain line piping
  • Copper elbow joints
  • Spigot

3. Turn Off Water To House

Turn the Water Main Valve Lever to the CLOSE position (perpendicular to the water pipe).

Drain the plumbing by turning on faucets around the house until no water flows. Then turn the faucets off.

4. Cut Copper Pipe Above Pressure Regulator

The next few steps involve cutting, preparing, and connecting the copper piping for the water filtration system. Below is an example of a copper piping connections diagram. Your connections and installation may vary due to the manner in which your piping has been plumbed.

Use a tool to score the copper pipe above the water pressure regulator.

Use a cutting tool to cut the copper pipe above the water pressure regulator.

5. Install New Elbow Joints

Remove existing elbow joint.

Sand down copper pipe to prepare it to accept a new elbow joint.

Insert new elbow joint.

Sand down copper pipe to prepare it to accept a new elbow joint.

Insert new elbow joint.

Adjust the orientation of the two new elbow joints.

6. Tighten Heads of Both Tanks

Each tank is delivered with the Head installed at the top. Before attaching the connection hoses, tighten the Head of both tanks to prevent leaks.

  1. Insert a short piece of 1" copper pipe in the opening on the head of the tank.
  2. Bump tighten the head of each tank in a clockwise direction ↻.

7. Attach Bypass Valve to Carbon Media Tank

The Carbon Media Tank is distinguished from the ScaleStop Media Tank by the Controller that it has on top.

Notice the OFF and ON positions of the large red arrow handles of the Bypass Valves.

Check Bypass Valve to ensure that the orientation is correct (view video below for details).

Apply plumber's grease all the way around the exterior threads of both openings of the Bypass Valve.

Apply plumber's grease all the way around the inside of both openings of the Head on the Carbon Media Tank.

Insert the Bypass Valve into the Head of the Carbon Media Tank.

Insert the Bypass Valve into the Head of the Carbon Media Tank.

Slowly and evenly hand tighten each lock nut of the Bypass Valve.

⚠️ Do not force the O-Ring in. Let the lock nut pull the O-Ring in as you hand tighten the nut. This will prevent rolling and smashing the O-ring, which would cause a water leak.

⚠️ Do not use a wrench when tightening each lock nut of the Bypass Valve. Hand tighten only.

The Bypass Valve is now securely attached to the Head of the Carbon Media Tank.

8. Attach Bypass Valve to ScaleStop Media Tank

The ScaleStop Media Tank has a Head at the top. It does not have the Controller on the top.

Check Bypass Valve to ensure that the orientation is correct (view video below for details).

Apply plumber's grease all the way around the exterior threads of both openings of the Bypass Valve.

Apply plumber's grease all the way around the inside of both openings of the Head on the ScaleStop Media Tank.

Insert the Bypass Valve into the Head of the ScaleStop Media Tank.

Insert the Bypass Valve into the Head of the ScaleStop Media Tank.

Slowly and evenly hand tighten each lock nut of the Bypass Valve.

⚠️ Do not force the O-Ring in. Let the lock nut pull the O-Ring in as you hand tighten the nut. This will prevent rolling and smashing the O-ring, which would cause a water leak.

⚠️ Do not use a wrench when tightening each lock nut of the Bypass Valve. Hand tighten only.

The Bypass Valve is now securely attached to the Head of the ScaleStop Media Tank.

Apply plumber's grease all the way around the interior of both openings of the Bypass Valve on the ScaleStop Media Tank.

Apply plumber's grease all the way around the interior of both openings of the Bypass Valve on the Carbon Media Tank.

9. Attach Connection Hoses

The diagram below shows how the hoses are connected to the tanks.

Attach the connection hoses to the Bypass Valves of each tank.

⚠️ Slowly and evenly hand tighten lock nuts on fittings and hoses (do not use a wrench).

⚠️ Do not force the O-Ring in. Let the lock nut pull the O-Ring in as you hand tighten the nut. This will prevent rolling and smashing the O-ring, which would cause a water leak.

⚠️ Do not use a wrench when tightening each lock nut of the Bypass Valve. Hand tighten only.

10. Work on Copper Connections

The next few steps involve cutting, preparing, and connecting the copper piping for the water filtration system. Below is an example of a copper piping connections diagram.

Cut copper connector and sand down the ends.

Fit straight copper connectors to copper elbows.

Weld copper elbow joint.

11. Install Water Line Valve for Water Flowing Into the House

Install water line valve for water flowing from the filtration system to within the house.

12. Install Copper Tubing and Spigot

Attach copper tubing to the right of the water valve that lets the water into the house.

Install copper tubing and spigot, which will be used to flush Carbon Media Tank during installation.

13. Install Drain Line From Carbon Media Tank to Outside of House

A drain line will be used to flow backwash water from the Carbon Media Tank (the tank that has the Controller) to outside of the house.

Measure section of drain line from the Carbon Media Tank.

Attach section of drain line from the Carbon Media Tank.

Drill hole for drain line to outside of house.

Drill hole on outside of house for drain line.

Drain line to cut to size.

Extend drain pipe from inside of the house to the outside of the house.

Cut the drain line that goes from inside of the house to the outside of the house.

Completed drain line goes from the top of the Carbon Media Tank to outside of the house.

Drain line goes from inside of house to outside.

14. Connect Hoses From Both Tanks to New Copper Connections

Connect the hoses from both tanks to the new copper connections and water valve into house.

Hose Connections

The diagram below shows how the hoses are connected to the tanks.

Entire System Connections

The diagram below shows the fully connected water filtration system.

⚠️ Caution All the connections are now completed, but the system is not yet operational. The Carbon Media Tank needs to be rinsed of manufacturing residue, the entire system needs to go through two or more regeneration cycles to adequately flush it, and the Bypass Valves need to be put in the open position.

15. Ensure Water Main Valve is Operational

Test the water main valve to ensure it is in good working condition. If it is difficult to operate, or if it leaks, replace the water main valve.

16. Flush Carbon Media Tank

The Carbon Media Tank must be flushed to rinse away any carbon residue from the manufacturing process, to prevent carbon residue from going into your home.

  1. Slowly CLOSE the water valve that controls water flow into the house .
  2. Slowly turn OFF the Outlet Side of the Bypass Valve on the ScaleStop Media Tank . Then slowly turn OFF the Inlet Side.
  3. Slowly turn ON the Inlet Side of the Bypass Valve on the Carbon Media Tank . Then slowly turn ON the Outlet Side.
  4. Slowly turn ON the Water Main Valve .
  5. Slowly turn ON the spigot and let the water run through the hose to outside until the water coming out is clear. This may take several minutes.
  6. To be sure that the Carbon Media Tank is fully flushed, fill a white bucket with water and examine the water to confirm that it is clear.
  7. If the water in the glass is not fully clear, continue to flush the Carbon Media Tank by turning the spigot on.
  8. Confirm the clarity of the water by filling a glass of water and examining it to see if the water is clear.
  9. When the flushing of the Carbon Media Tank is completed, slowly turn ON the Inlet Side of the Bypass Valve on the ScaleStop Media Tank . Then slowly turn ON the Outlet Side.

⚠️ IMPORTANT Thoroughly flush the Carbon Media Tank during installation, to ensure all the residue from the carbon media manufacturing process is rinsed away.

17. Remove Air Out of System

  1. Slowly CLOSE the water valve that controls water flow into the house .
  2. Slowly turn ON the Inlet Side of the Bypass Valve on the ScaleStop Media Tank . Then slowly turn ON the Outlet Side.
  3. Slowly turn ON the Inlet Side of the Bypass Valve on the Carbon Media Tank . Then slowly turn ON the Outlet Side.
  4. Slowly OPEN the water main valve .
  5. Attach a long hose to the spigot at the center of the water filtration system. Extend the hose so it reaches outside of the house.
  6. Slowly turn ON the spigot and let the water run through the hose to outside.

18. Set Controller Settings

For optimal performance, the water filtration system requires regeneration which automatically flushes both tanks every 30 days for 15 minutes.

The Controller allows you to set the time and frequency of the monthly regeneration cycle. You will set the current time, then set the regeneration time to 10:00 AM, and the regeneration frequency to once every 30 days.

Plug in power cord of the Controller into a nearby electrical outlet.

Set Current Time

  1. Press and hold the SET button for 3 to 5 seconds. The hour flashes in the display.
  2. Press the ▲ or ▼ arrow to set the hour.
  3. Press the SET button. The minutes flash in the display.
  4. Press the ▲ or ▼ arrow to set the minute.
  5. Press the SET button when done.

Set Regeneration Time to 10:00 AM and Frequency to Every 30 Days

Press and hold the SET and ▲ buttons at the same time for 3 to 5 seconds. The minutes flash in the display.

Press the ▲ or ▼ arrow to set the time to 10:00 AM.

Press the SET button to continue to set the regeneration frequency.

Press the ▲ or ▼ arrow to set the frequency to every 30 days.

Press the SET button when done.

Backup Battery

The Controller has a backup battery inside. This provide several hours of power in the event of an electrical power loss to your house.

Replace the battery every year.

The video below demonstrates how to set the Controller settings.

Troubleshooting Controller

⚠️ Caution The Controller cannot be exposed to outdoor elements, such as direct sunlight or atmospheric precipitation. The system may be installed in a covered, open-air structure such as a carport, residential or commercial building.

For more information, click Controller Manual.

19. Backwash Water Filtration System 2 to 3 Times Before First Use

The entire water filtration system must undergo flushing to remove any particulates, sediment, or residue before use. This process is called regeneration or backwashing.

Close Valve Into House and Open Bypass Valves

  1. Slowly CLOSE the water valve that controls water flow into the house .
  2. Slowly turn ON the Inlet Side of the Bypass Valve on the ScaleStop Media Tank . Then slowly turn ON the Outlet Side.
  3. Slowly turn ON the Inlet Side of the Bypass Valve on the Carbon Media Tank . Then slowly turn ON the Outlet Side.
  4. Slowly OPEN the water main valve .

Perform 2 to 3 Backwash or Regeneration Cycles

  1. On the Controller, press and hold the ▲ or ▼ buttons at the same time for several seconds until the valve motor starts and the backwash or regeneration process begins.

    The Carbon Media Tank will be in a backwash mode, which is the first of two cycles it goes through during regeneration. Backwash takes 14 minutes. The next cycle is the rinse which takes 5-8 minutes depending on the setting.
  2. Go outside and observe the water coming out of the drain line. The water will be grayish.


    There should be no carbon media coming out of the drain line. If you see a large amount of carbon media coming out, it means that the water pressure is too high or the drain flow control for the Controller is missing. The water pressure should be less than 100 pounds per square inch (PSI). If it is greater than this amount, use the water pressure regulator to decrease the water pressure.

    If possible, verify that the backwash flow is 5 gallons per minute, which is the recommended backwash flow rate for 1.0 and 1.5 cubic foot models. If you have a 2.5 cubic foot Carbon it should be backwashing at 10 gallons per minute. You can 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 Carbon media and prevent it from cementing together.
  3. After the backwash is complete, repeat the process by pressing and holding the ▲ or ▼ buttons at the same time for several seconds until the valve motor starts and the backwash or regeneration process begins. The regeneration cycle takes about 25 minutes.
  4. After the second regeneration cycle is complete, slowly turn ON the spigot with the hose attached and fill a white bucket with water.

    Examine the water in the bucket and confirm if its clear. If the water is gray or discolored, perform a third regeneration cycle by pressing and holding the ▲ or ▼ buttons at the same time for several seconds until the valve motor starts and the backwash or regeneration process begins.
  5. After the third regeneration cycle is complete, slowly turn ON the spigot with the hose attached and fill a white bucket with water, and confirm that the water is clear.
  6. Slowly OPEN the water valve that controls water flow into the house .
  7. Remove the hose from the spigot .

⚠️ IMPORTANT Backwash the entire system at least twice during installation, to ensure that the media in both tanks are fully flushed.

20. Open a Nearby Faucet and Drain Any Sediment From Water Line

  1. Slowly OPEN the water valve that controls water flow into the house .
  2. Slowly turn ON the Inlet Side of the Bypass Valve on the ScaleStop Media Tank . Then slowly turn ON the Outlet Side.
  3. Slowly turn ON the Inlet Side of the Bypass Valve on the Carbon Media Tank . Then slowly turn ON the Outlet Side.
  4. Slowly OPEN the water main valve .
  5. Go to the nearest faucet within the house and turn on the cold water. Let it run for several minutes, to drain away any sediment from the water line.
  6. Fill a white bucket with water and confirm that the water is clear.

21. Turn on Faucets to Relieve Air in the Plumbing

Slowly open all faucets within the house to relieve any air in the plumbing, then close them.

22. Install Metal Strap Around Both Tanks

Attach metal strap around both tanks to secure them in the event of an earthquake.

The installation is complete!


Annual Maintenance

  • Clean the backwash flow control.
  • Verify that the flow meter is functioning correctly. Clean the impeller, if necessary.
  • Verify the programming of the Controller. Reprogram, if necessary.
  • Verify the minimum and maximum water pressure (15 psi - 100 psi). Adjust the a water pressure using the pressure regulator, if necessary.
  • Change the Controller battery.

Contact Us

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