Sewer Liners Boston. Many people in Boston are aware of what sewer liners are, but most people do not understand the process of sewer lining. Perma-Liner has various methods of installation for sewer liners. Sewer liner air inversion, pull in place sewer liners, and push in place sewer liners. If you live in Boston, you’ve probably seen some of these methods in use. If you’re looking for more information on the process and materials used for sewer liners, please do not hesitate to contact us!