The patented Buttress-Loc® installation system allows replacement of failing systems without the need to excavate or even remove existing pipe.

Short lengths of pipe, lowered down the manhole one at a time, are fastened together using a chain wrench. The joint automatically self seals. An end protector plate is attached for hydraulically pushing or winching completed sections further into the sewer from manhole to manhole. This routine is carried out until the entire pipe insertion is finished.