| Business | Phone |
| Wayne Automatic Sprinkler Corp 10720 Midwest Industrial Blvd, St Louis 63132 | (314) 426-9700 |
| United Fire Protection 9844 Antonia Dr, St Louis 63123 | (314) 256-0716 |
| Southwest Avenue Pipe 4427 Geraldine Ave, St Louis 63115 | (314) 385-3311 |
| Guardian Fire Protection 3611 Juniata St, St Louis 63116 | (314) 771-5227 |
| Gateway Fire Protection Systs 4860 Baumgartner Rd, St Louis 63129 | (314) 892-7622 |
| Electronic Technicians Sec 1530 S Big Bend Blvd, St Louis 63117 | (314) 645-7557 |
| Century Fire Sprinklers Inc 11777 Lackland Rd, St Louis 63146 | (314) 692-8011 |