American Development Corporation Stenner brand peristaltic pumps.  These pumps can be adjusted to deliver as little as 0.2 gpd to as much as 85 gpd, and anywhere in between.  They are the most dependable pumps on the market.

Peristaltic metering pumps provide the most efficient and reliable means for the injection of chemicals into a water or wastewater treatment application.

Other advantages include:       

üSelf-priming up to 25 feet and will not lose prime. 
üChemicals are contained in a tube, not exposed to pump components or air.
üCan run dry without damage.
üSimple adjustments with external dial.