In combination with the Kit 100867 you can use this set to bypass the pump controller. To diagnose problems with the controller or pump. After you have diagnosed a weak pump pressure, simply remove the controller and select the correct adapter from the case to bypass and seal the connector. When the pressure returns to normal after the test, the slider causes a loss of pressure. However, if the pressure remains too low, the pump is defective. The test is recommended by the manufacturer of high-pressure pumps. The kit contains 8 different adapters to seal all controller connectors.