| Business | Phone |
| Mc Carthy & Sons Plumbing Royal Oak 48067 | (248) 545-5141 |
| Kotz Heating & Air Cond Royal Oak 48067 | (248) 547-2237 |
| American Backflow Svc 3339 Ellwood Ave, Royal Oak 48073 | (248) 586-9110 |
| Drain Depot 4535 Delemere Blvd, Royal Oak 48073 | (248) 549-1383 |
| Tropicool Heating & Cooling Royal Oak 48067 | (248) 259-6556 |
| Express Rooter Svc Royal Oak 48067 | (248) 586-9244 |
| Metro Rooter Royal Oak 48073 | (248) 361-1750 |
| Gary Sumner Plumbing 4001 Crooks Rd, Royal Oak 48073 | (248) 549-4610 |
| City Express Heating Cooling Royal Oak 48067 | (248) 547-0200 |
| A-Certified Heating & Cooling Royal Oak 48067 | (248) 541-5885 |
| Bob Carpenter Heat & Cooling 728 E 11 Mile Rd, Royal Oak 48067 | (248) 644-0123 |
| Arctic Air Inc 4918 Fernlee Ave, Royal Oak 48073 | (313) 491-5300 |
| David's Plumbing 1833 N Center St, Royal Oak 48073 | (248) 616-0457 |