The City of Toronto has been a longtime user of CIPP and trenchless techniques in general. With a population of more than 2.6 million and infrastructure dating back to the mid to early 1800s, you can be sure that over the years Toronto has had its share of challenges in maintaining its subterranean pipes. The City is familiar with the ASTM F2561 standard practice for renewing lateral pipes and for forming a non-leaking connection to the main pipe by use of a main/lateral liner outfitted with compression gaskets and over the years, many service lines have been renewed where the repair conforms to this industry standard.
When it came time to renew an old egg-shaped, brick-and-mortar sewer, city officials also sought a solution for renewing the service connections and forming a long-term watertight seal to the mainline liner.
The City prepared the tender and the project was awarded to D.M. Robichaud Associates. The Oshawa, Ontario-based company is no stranger to renewing service lateral pipes — having specialized in trenchless installations of cleanouts using small-bore vacuum techniques (ASTM F3097) and renewing service lateral pipes and rebuilding the main connection (ASTM F2561) since the early 2000s.
*Read the whole article on Trenchless Online