| Business | Phone |
| Superior Drainage Products Inc 3131 E Governor John Sevier, Knoxville 37914 | (865) 637-0069 |
| Consolidated Pipe & Supply Co 7224 Ball Camp Pike, Knoxville 37931 | (865) 690-6907 |
| Hayes Pipe Supply 3000 Industrial Pkwy E, Knoxville 37921 | (865) 525-1717 |
| Industrial Plastic Works 2820 John Deere Dr, Knoxville 37917 | (865) 546-9422 |