For years, Steve Allen was frustrated by his inability to effectively tackle what he believes is a large potential market for pipeline rehab work: lining vertical stack pipes that are failing in condominium and apartment buildings.But all that changed when Allen — the owner of Allens Plumbing in Hawaii — learned about the tee liners made by Repiper AB, a Swedish-based company he ran across at a recent Water & Wastewater Equipment, Treatment & Transport (WWETT) Show. (The product is distributed in the U.S. by APEX CIPP Solutions and Pipe Lining Supply.)“The tee joint (for branch lines off the stack
