Bürkle Otal pumps are simple, reliable liquid handling and dispensing devices in polypropylene with a polyvinyl chloride stopper. Available with either hand- or foot-operated squeeze bulb and release button to interrupt the flow. The down tube is extendible and this enables the pump to be used with various sizes of bottles. Liquid is forced into the collecting vessel by squeezing the bulb and the flow can be instantly interrupted by pressing the release button. Excess liquid can be sucked back by pumping and operating the release button. For use as a siphon additional tubing must be attached to the outlet tube and after pumping the liquid will flow continuously. Mounted on a 3-part, PVC stopper to fit openings as indicated. Not suitable for pumping highly flammable liquids.