How long will it take from interest to implementation?

On average within 30 days or less an FMD can be custom manufactured and installed after initial interest from the client.

This will depend heavily on Zennergy receiving the required information.

How many FMD’s have been installed?

Over 3,600 FMDs have been installed in the U.S. and Canada to date.  The sizes range from 1″ to 12″, in companies of all sizes.

What sizes do the FMD come in?

The FMDs are custom manufactured in the following sizes:

  • 1 inch
  • 1.5 inch
  • 2 inch
  • 3 inch
  • 4 inch
  • 5 inch
  • 6 inch
  • 7 inch
  • 8 inch
  • 9 inch
  • 10 inch
  • 11 inch
  • 12 inch
  • the FMD can be custom built up to 36 inches

Have any FMD’s failed?

There has been only ONE (1) mechanical failure.

If the FMD were to Fail it would fail in the Open position with the Intake Cone sliding all the way back allowing full water flow. You will see an unexplained increase in water consumption if there is a failure.

What pressure loss can I expect to see?

You can expect to see a pressure reduction between 2-5 lbs after installation of the FMD.

This should not be noticeable and will not affect day to day operations.

Do I need permissions from the city or water provider?


The FMD is installed on the property side of the meter, and does not require permission from the city and/or water provider.

Will I need a permit?

In some cases, you will need a permit for the installation of the FMD. This permit is essentially a check valve permit that will be supplied by the plumbing company installing the FMD.

How long is the installation process?

On average between 1 – 4 hours, the water to the facility will be off approximately 1 hour in most cases.

Does the FMD harm the system?

The FMD will not harm any equipment upstream or downstream for the device. The FMD does not Produce or Create:

  • Forced Water Through The Meter
  • Harmonics
  • Water Hammering
  • Vibrations

How do you know the FMD is working?

Zennergy will establish a base percentage savings once the installation has taken place.

The client will see an immediate reduction in consumption on their monthly bill.  This reduction will then be compared to Zennergy’s tracking data, which will show the true savings and verify that the FMD is working.

What kind of savings can I expect to see?

Depending on the facility we typically see the following savings:

Condo’s, Campus Housing, Mobile Home Parks, etc. 12% to 18% and as high as 35%

Manufacturing, Industry, large users, etc. 8% to 12% and as high as 20%

Office buildings, light industrial, etc. 10% to 15% and as high as 20%

Irrigation systems 10 % to 20% and as has as 40+%