Abstract: Push-fit connector and method of heating a fluid in the push-fit connetor. The push-fit connector includes a housing, an accommodation space and a connecting piece connected by a channel, a heating zone located in an inside of the channel and a heat-conducting element being arranged between the heating zone and the accommodation space.

Abstract: Coupling element for a fluid line, an unlocking element, and a method of engaging and/or disengaging the coupling element with an insertion element. The coupling element includes a housing having a receptacle region structured and arranged to receive an insertion element, and a snap-in locking device in the receptacle region that is structured and arranged for a locking connection with the insertion element. The snap-in locking device includes at least one locking element having an unlocking lever and an unlocking element is movable between a first position, in which the unlocking element interacts with the unlocking lever, and a second position, in which the unlocking element releases the unlocking lever.

Abstract: Push-fit connector and method of heating a fluid in the push-fit connetor. The push-fit connector includes a housing, an accommodation space and a connecting piece connected by a channel, a heating zone located in an inside of the channel and a heat-conducting element being arranged between the heating zone and the accommodation space.

Abstract: Line element and method for forming a line element. The line element includes a fluid line, and a housing structured and arranged to surround the fluid line in a radially fluid-tight manner. An annular space is formed between the fluid line and the housing, which is filled at least in part with a compressible medium, and the fluid line has at least one opening inside the annular space.