Company Description. Pipe and Duct Systems, LLC is a WBE-certified mechanical contractor specializing in commercial and industrial HVAC, plumbing, and pipefitting. We offer 24/7 service and planned maintenance programs for HVAC and plumbing systems, custom sheet metal and pipe fabrication, and full-service plumbing solutions in St. Louis. Our clients come from various industries, including commercial, industrial, healthcare, education, government...
