EFPLP1 jointing kit containing joint and shrink accessories for the watertight extension of a cable by means of a connector cable (MMJ or MMCK) and a termination accessory. EFPLP2 jointing kit for connecting a heating cable to a junction box or a termination accessory. The cable is laid from the point of installation to the box either as it is or in a protective tube. The kit includes a cable-shaped rubber seal. EFPLV1 pressure resistant lead-through for laying Optiheat 10 and Plug'n Heat cables inside a water pipe.