Copyright © 2002-2007 Polk Mechanical Company, LLC. All Rights Reserved. Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the Polk User Agreement and Privacy Policy. DFW Licenses: Texas Plumbing License No. M-35513       Texas A/C & Refrigerant License No. TACLA16383C Houston Licenses: Texas Plumbing License No. M-17805    Texas A/C & Refrigerant License No.  TACLA1867C Polk Employee Login