Welcome to Pumptec's Forum! Pumptec designs and manufactures pumps of our own patented design in the USA. Pumptec pumps provide maximum performance for lowest amount of energy use when compared to roller, centrifugal, small plastic and large gas engine-driven diaphragm pumps. For this reason, Pumptec plunger pumps provide the maximum performance possible from a 12 or 24 VDC powered system. As an added bonus, Pumptec plunger pumps do not have diaphragms to fail you during a job. The complete repair tool kit is a 3/16" hex wrench and your fingers! Please feel free to ask any questions, or post any comments, and we will do our best answer these for you. Thanks.