Aarsleff offers renewal of built-in or exposed wastewater downpipes.

A tube of acid-proof polyester fibre impregnated with resin is produced so that length, dimension and wall thickness fit perfectly to the downpipe in question.  

The tube is inverted in soft condition into the downpipe from the top or the bottom. When the tube is in place and cured, the ends are cut, and the downpipe can be connected to the remaining installations.