In this Blog, Michael Tobias highlights the US Environmental Protection Agency's WaterSense labeling program for plumbing fixtures.
When a product has the label, it guarantees savings of 20% or more with respect to the federal baseline.
VFDs In particular, this blog argues the need for Varibable Frequecy Drives as they can reduce the speed of the pump motor until the flow provided matches demand.
To read more click here.