The adjustable LPG installation kit comprises a jacket pipe of variable installation length, which is fixed in position by a cutting ring coupling. The length of the jacket pipe can be shortened on-site. After the adjustable LPG installation kit has been installed in the tank, the VISY-Stick level sensor is inserted into the jacket pipe without float and screwed into position. The level sensor can be exchanged at any time without having to depressurise the tank.