Trenchless Pipe Lining Los Angeles. We are coming to the Los Angeles area in 2012 to put on Trenchless Pipe Lining seminars and demonstrations. Perma-Liner has traveled the country to show contractors how to grow their business with trenchless pipe lining. Our underground infrastructure continues to fail and trenchless pipe lining is the best, most cost-effective way to rehabilitate what we take for granted. If you live in Los Angeles, San Francisco, or San Diego please call us to sign up for the next trenchless pipe lining demonstration!