The Great Southwestern Illinois Association of Plumbing-Heating-Cooling and Mechanical Contractors
The Great Southwestern is an organization of union-affiliated contractors, primarily located in the southwestern Illinois counties of St. Clair, Madison, Bond, Clinton, Monroe, Randolph, and Washington. Contractor members of the GSW-PHCC employ members of the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada:

Our Members install and service hot water systems, steam boilers, air conditioning units, as well as plumbing and drains. We and our fellow contractors provide the safest piping systems for water purification, hospitals, sewage treatment, power plants, steel mills and many other public and private buildings. We've Moved! Please note our new address and telephone numbers below. Tracy A. Hermanson, Executive Director The Great Southwestern Illinois Association of Plumbing-Heating-Cooling and Mechanical Contractors 209 West Pointe Drive, Suite A Swansea, Illinois 62226 (618) 236-9100 voice (618) 236-9101 fax