www.thedriller.com/articles/85144-variable-speed-pump
Variable Speed Pump
September 1, 2001
Variable Speed Pump
Hays Pumps' Quantum Variable Speed Booster (QVSB) pump uses constant pressure technology to improve water pressure. It is field adjustable, features run-dry protection, is computer connectable (4/20 mA) and has constant flow capability. The QVSB uses only a small 2-gallon pressure tank, and its plug-and-play design make it easy to install. Hays Pumps.
