Legacy View makes setting up and monitoring your Chandler Systems water treatment system easier than ever! This App covers systems sold under Chandler Systems' three brands (CSI, Clearion and WaterSoft) that use the Legacy View Valve. When used with a Legacy View Valve the user, through the app, can do the following functions:

- Conveniently view all valve settings and status.
- Easily change valve settings.
- View current water usage information.
- Graphically view water usage information.
- Start a regeneration or backwash cycle from your phone or tablet.
- Set / view the servicing water treatment dealer information.
- Better understand how your system is working and understand what settings are for.
- Connect to all of your valves in your system from one tablet or phone.
- Update firmware on Bluetooth LE valves
- Manage your connection to your valves.

Note: This app is only compatible with Chandler Systems valves that have a revision number greater or equal to “C2.00”. These valves use Bluetooth 4.0+ (a.k.a. Bluetooth LE) to communicate and require smartphones or tablets to also have Bluetooth LE to use the features in this app. All recently manufactured Apple devices are Bluetooth LE compatible. Check your device specifications if you are unsure of it's compatibility.

(The firmware revision of the valve can be viewed on the valve display for 2 seconds after the valve is powered up.)

What’s New

Version 3.0.24

New Firmware (C4.08)

Ratings and Reviews

2.6 out of 5
39 Ratings

39 Ratings

Apple 6S sgdhejdndksjf ,

Bluetooth no longer connects to Apple 6S phone

This app worked great when I replaced a failed control board on my water softener signature series II. The new control board includes blue tooth connectivity intended for use with this legacy view app. I was able to easily connect with my phone a see/change data in the controller.

Now, about a year later Bluetooth on my phone (Apple 6s) I cannot find the softener controller. Bluetooth is active on my phone and I am able to discover other Bluetooth devices. Is there a know reason this might occur? Possibly a software update that is lot longer compatible with Apple 6s?

Please help if you are able. I did enjoy the convenience of monitoring the system through my phone. The softener still works and accepts input at the control panel. Unfortunately it is not an intuitive process at the panel.

Thanks You.

Developer Response ,

Hello - Sorry for the late reply. The app is still compatible with Apple 6s. Please call our free tech support at (888) 363-9434 so we can get more details and help you figure this issue out.

eyesurge ,

Makes managing water consumption easy

The app has worked well on my iPhone SE and now SE (2020) since I installed my water softener about 6 months ago. It connects to the softener’s 5900BT head even when I’m well outside the house and generally makes it easy to schedule backwashes, etc. Only one complaint, and the reason I give it four stars: the ‘average water usage per day’ displayed is way off for some reason. I can see my daily usage in the chart, which is generally ~650 liters per day (this seems about right), but the average consistently shows around 2250 L even after many months of use.

Developer Response ,

Thank you for your review! We will look into the average issue. If you contact us via then we can respond to you directly if we need any further information about this specific problem.

Umthetho ,

App works great

After initially having Bluetooth connection issues, I called CSI and they were able to solve the issue which required me to power down the water softener, remove the 9v battery, uninstall and then reinstall app. After following those steps the problem was resolved and I am happy with the system, it works fine and now I am able to get all the numbers I need.

Developer Response ,

We are sorry that you are having trouble connecting to your Legacy View valve. First, please try the troubleshooting steps in this link: If those suggestions do not solve your problem, please contact us at or call us M-F during normal business hours (EST) at (888) 363-9434. We will get your connection working again, and will resolve the issue.

App Privacy

The developer, Chandler Systems, Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Chandler Systems, Incorporated
30.8 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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