Water meter billable flow reduction

[U Wash]

I received a sales solicitation today, they claim their "Water management H2 saver valve" will reduce the meter reading by compressing the air that water pipes contain. Indicating a 30% reduction. The valve is installed after the water meter on my property. Anyone know the truth about this device? How is it suppose to work? I read their explanation but I am not sure I understand how they are compressing this supposed air in the water. I am thinking it is just a rip off and thought someone might know if it works or not.

Here is the web site for the device.
http://greenbeanssolutions.com/

 

[MEP001]

It's a scam. It just restricts flow, nothing more.

 

[Earl Weiss]

At one ICA show there was booth demonstrating such a device. I have never heard from anyone that they have had good results with this. Doesn't mean it doesn't happen.

 

[Randy]

It's been around before. It's all BS, it doesn't work.