| Business | Phone |
| Hico Flex 931 W 19th St, Chicago 60608 | (312) 733-2000 |
| Jms Group Inc 5844 W Higgins Ave, Chicago 60630 | (312) 283-3414 |
| Richard Specialty Co 4917 W Belmont Ave, Chicago 60641 | (773) 725-2907 |
| National Plumbing & Heating 5740 N Tripp Ave, Chicago 60646 | (773) 478-4900 |
| Illinois Mechanical Sales 2627 N Western Ave, Chicago 60647 | (773) 342-8330 |
| Shilvock Co Inc 2226 N Milwaukee Ave, Chicago 60647 | (773) 252-2219 |
| K & B Galleries Ltd 222 Merchandise Mart 1880, Chicago 60654 | (312) 645-1833 |
| Schmit-Kane Pipe & Supply Co 5834 N Clark St, Chicago 60660 | (773) 334-6300 |
| O'Connor & Co 400 S La Salle St, Chicago 60605 | (312) 386-1298 |
| Lacava Llc 2243 S Throop St, Chicago 60608 | (312) 666-4873 |
| Wynne D City Power 2035 S Racine Ave, Chicago 60608 | (312) 243-6414 |
| Spire Solar Chicago 629 W Cermak Rd 305, Chicago 60616 | (312) 492-1370 |
| Tri-R Heating & Cooling Co 3745 N Cicero Ave, Chicago 60641 | (773) 283-4644 |
| Tai Plumbing 3523 W Medill Ave, Chicago 60647 | (773) 782-1107 |