Abstract: A system for delivering frac water at high pressure is provided, including a first pump positionable within a tank, the first pump configured to receive water from within the tank and output the water at pressure to a first pressure tank; a second pump positionable above the first pressure tank, the second pump configured to receive water from the first pressure tank and output the water at pressure to a second pressure tank; and a third pump positionable above the second pressure tank, the third pump configured to receive water from the second pressure tank and output pressurized water to a discharge piping, the discharge piping leading said pressurized water over a wall of said tank.

Abstract: A system for delivering frac water at high pressure is provided, including a first pump positionable within a tank, the first pump configured to receive water from within the tank and output the water at pressure to a first pressure tank; a second pump positionable above the first pressure tank, the second pump configured to receive water from the first pressure tank and output the water at pressure to a second pressure tank; and a third pump positionable above the second pressure tank, the third pump configured to receive water from the second pressure tank and output pressurized water to a discharge piping, the discharge piping leading said pressurized water over a wall of said tank.

Abstract: A hand held transmission fluid exchanger including a housing block having parallel new and used fluid passages therein, such passages being joined by a return passage having a pressure relief valve therein. The method involves connecting such exchanger with a conventional on-demand transmission fluid supply system having a meter therein and holding the dispensing gun open so that flow is controlled by valves incorporated in the exchanger.

Abstract: An automatic transmission fluid changer for connection with a cooling circuit of an automatic transmission, including a used fluid receptacle for collecting fluid pumped from the transmission and a new fluid receptacle for containing new fluid supplied to the transmission. The device monitors the quantity change in the new and used receptacles and regulates the flow of new fluid into the transmission in order to replace the used fluid expelled from the transmission with an equal amount of new fluid.

Abstract: Method and apparatus for changing transmission fluid by draining out used fluid and pouring in fresh fluid until the electrical conductivity of the outflowing fluid is substantially equal to the electrical conductivity of the inflowing fresh fluid.

Abstract: An automatic hand held transmission fluid changer includes a compact housing internally plumbed with a pair of open ended drain and supply tubes for connection at respective first ends with a pair of hoses connected at their respective opposite ends to remote waste and unused fluid tanks. The respective tubes include second ends for connection with a second pair of hoses leading to respective upstream and downstream transmission components for, respectively, withdrawing used fluid from and introducing unused fluid to a transmission. A demand pump is connected in fluid circuit with the supply hose to flow unused fluid from the unused fluid tank to the supply tube. A controller is provided and acts to receive an electric signal proportional to the rate of fluid flow from a flow meter in the drain tube and to manipulate a control valve in the supply tube such that an automatic balancing of flow rates is achieved.

Abstract: An automatic transmission fluid exchanging device includes drain and supply tubes to conduct used transmission fluid from and unused transmission fluid to a vehicle transmission. The device further includes a supply pump in the supply tube to flow unused transmission fluid into the transmission. A pair of flow control valves are disposed in the respective drain and supply tubes to allow the operator to match the flow rates of fluid through the respective tubes.

Abstract: An external adapter includes an elongated housing formed with a pair of internal open ended longitudinal fluid passageways defining, respectively, a used fluid and an unused fluid passageway. The used fluid passageway is internally threaded at one end thereof for engagement with a mounting fitting formed on a transmission filter mount for vehicles with external transmission fluid filters. The opposite end of the used fluid passageway is threaded for engaging one end of a used fluid fitting which includes an opposite end for connection to a drain hose for withdrawing used fluid from the used fluid fitting. The unused fluid passageway includes a first end which aligns with at least one filtered fluid port on the filter mount when the adapter is engaged with the mounting fitting.

Abstract: A hand held transmission fluid changer includes a compact housing internally plumbed with a pair of open ended drain and supply tubes for connection at respective first ends with the first ends of a pair of hoses connected at their opposite ends with remote waste and unused fluid tanks. The respective tubes include respective second ends for connection with a second pair of tubes leading to respective upstream and downstream transmission components for, respectively, withdrawing used fluid from and introducing unused fluid to a transmission. A demand pump is connected in fluid circuit with the supply hose to flow unused fluid from the unused fluid tank to the supply tube. A pair of flow control valves are disposed in the respective tubes to allow the operator to adjust and match the respective flow rates through such tubes.