| Business | Phone |
| Ams Tube Corp 9300 Harris Corners Pkwy, Charlotte 28269 | (704) 598-8375 |
| Metrolina Sprinkler Co 3901 Hargrove Ave, Charlotte 28208 | (704) 392-9376 |
| Virginia Sprinkler Co Inc 3380 Green Park Cir # B, Charlotte 28217 | (704) 319-5060 |
| Queen City Automatic Sprinkler 3425 Asbury Ave, Charlotte 28206 | (704) 372-7762 |
| Crawford Sprinkler Co Charlotte 28204 | (704) 376-5576 |