Flow-Rite Controls, Ltd., founded in 1981 by a group of businessmen experienced in international manufacturing and an engineer with an interest and background in fluid mechanics. Developed a line of fluid control products now know as Pro-Fill and Quik-Fill in the Industry. Flow-Rite makes battery maintenance easy with a full line of Single Point Battery Watering systems and flip top watering caps for your batteries. Whether you own a boat, Golf Cart, Rv now you can fill your batteries faster, safer, and more reliably than ever before with Millennium Evo, Pro-Fill, or Qwik-Fill on-board watering systems. Each application specific system consists of automatic shut off valves interconnected with tubing that replace the existing vent caps. A quick coupling allows the system to be connected to a water supply. Once connected, water flows into each cell until it reaches the correct level.