Inflation and “Calibrating" of the lining tube is done by slowly increasing the air pressure, even several times. Wrinkles on the inner lining tube are thus minimized.

When using the winched-in-place insertion, pre-sealing of ground water infiltrations is not absolutely necessary. In this case, however, it must be ensured that infiltrating ground water can drain off during the expansion of the lining tube.

Therefore, the lining tube is installed with the direction of flow from the high point to the low point.

Damage points with infiltrating ground water are thus closed one after the other.

The lower end piece of the lining tube located at the low point is only inflated at the very end, when infiltrated ground water has drained off, so that a close fit to the host pipe is achieved.