Basin Plumbing is regulated by the Texas Department of Licensing and Regulation, P.O. Box 12157, Austin, TX 78711. 1-800-803-9202, 512-463-6599 & the Texas State Board of Plumbing Examiners, P.O. Box 4200 Austin, TX 78765-4200, 512-458-2145. G. Tavera Master Plumbing License # M-40647.