"Under Pressure" WWJ article 2009

[Cary Austin]

There are several references by contractors in this Water Well Journal article from 2009.  As I post this at the end of 2014 you should understand that many of the VFD's mentioned by these contractors have already been taken off the market due to problems.  You should also understand that many of the VFD's systems the contractors said had not given them any problems have most likely failed since this article was written in 2009.