South Dakota - Duncan Company
- Address: 425 Hoover Street NE
Minneapolis, Minnesota 55413 - Phone: (612) 331-1776
- Fax: (612) 331-4753
- Email & Website: Email Website
- Territory: South Dakota - counties east of and including McPherson, Edmunds, Faulk, Hyde, Buffalo, Brule, Charles Mix, and Gregory (Regulators and Control Valves Only)
South Dakota - Rust Automation and Controls, Inc.
- Address: 8070 South 1300 West
West Jordan, Utah 84088 - Phone: 1-800-772-0878
- Fax: 1-866-315-0136
- Email & Website: Email Website
- Territory: South Dakota - Statewide (Tank Equipment & Flame Arrestors Only) - Counties west of and including Campbell, Walsworth, Potter, Sully, Hughes, Lyman, and Tripp (Regulators & Control Valves Only)
