Double D Piping is an independent fire protection contractor based in Cleveland, Tennessee, serving Tennessee, Alabama, Georgia, South Carolina and North Carolina. It installs and services wet, dry, pre-action, deluge and foam sprinkler systems, fire pumps, standpipes, fire mains and hydrants, with its own pipe fabrication and underground utility crews. It also covers restaurant, clean agent and CO2 suppression, fire alarms, emergency lighting and backflow testing. It holds Tennessee Fire Alarm Contractor Licence #2494 and Tennessee Contractors Licence #42134, and its staff include two NICET Level III (water-based systems) engineers.