Leak off pipe connector connects the injector to the spill rail and takes the excess diesel to the injection pump, where it is put back into the tank. In short, they are connected to small braided pipes that over time can cause problems, leaks or air entering the system. Leak off pipe connector ensures optimum performance and can withstand high temperatures. To better serve the use of diesel in the engine, the diesel leak off pipe connector proved to be an optimal choice because of its design and quality, which can withstand high pressure. In the automobile industry, quick coupling is an ideal method to connect the medium conveying line with the ventilation exhaust line. The following article gives you more details about what they are and some tricks to disconnecting them.