No electricity required. Water flow through the pump housing serves as the power source to acuate an internal piston to draw in water soluble chemical to achieve dilution rates up to 10%. Respective models are suitable for handling flow rates from .09 to 11 gpm. Chemical dilution rates maybe easily changed in the field without the need for any tools. Induction rates remain constant without regard to fluctuations in flow and pressure. Low maintenance pump is easy to install and service. Units are equipped with a valve to turn chemical draw on and off. Inline installation connections are 3/4" hose barb or 3/4" garden hose thread. Wetted materials of construction include: glass filled polypropylene housing, aflas seals, stainless steel (95112 & 95111) and hastelloy (95113) springs, polyethylene suction tubing and polypropylene marble filled weight and filter. A 200 mesh inlet strainer is recommended on all MixRite installations.