Perma-Lateral Lining Seattle. A Seattle contractor was called out to a neighborhood that was experiencing slow running drains due to roots. A cleanout had been put in a year ago for this very problem, but the root problem was not going away. The Seattle contractor decided that the Perma-Lateral lining system was the only permanent solution. Within four hours of arriving onsite, the Seattle contractor had relined 20 feet of 6 inch pipe and quickly cured the line with hot water. If you live in Seattle and experience slow drains, the Perma-Lateral lining system might be your only solution.