Mityvac MV6400 Fluid Dispensing System An integrated manual pump dispenses fluid by pressurizing the 1.2 gallon (5 liter) reservoir Fluid is continually dispensed as long as there is pressure in the reservoir and freeing up the operator's hands; pumping is only required to build additional pressure The pump tube is sealed to prevent exposure to chemicals and cleans easily between fluid changes For convenience and speed, push-to-connect, quick-change style couplers are used to at both ends of the fluid dispensing hose A thumb-operated tilt valve is conveniently located for manual pressure relief, and doubles as a safety valve to prevent over pressurization