Ferguson Certified Backflow Testing & Plumbing in Crooksville, OH is a local professional plumbing contractor specializing in services such as Plumbing Contractor – Residential & Commercial, Backflow Prevention Devices & Services, Building Contractor, Building Contractor – Residential & Commercial, Excavation Contractor, Plumbing Equipment – Service & Repair, Water Line – Installation & Repairing, Plumber, Sewer Contractor.