Maintenance & RepairAt DMD, our technicians are experts when it comes to maintenance and repairs. DMD has serviced and maintained over 600,000 hydrants in over 30 states nationwide. Flow Testing DMD can assist in performing flow tests on your hydrants to provide valuable insight into available fire flow rates, model calibration and hydrant conditions. Contact us Flushing and Lubrication Flushing and lubrication are both key parts to scheduled maintenance. Contact us if you would like DMD to help jumpstart your routine maintenance program. Contact us Repairs Hydrants left unmaintained, those installed on busy roads or aged models can need repair. Our team has worked on all makes and models, giving us an in-depth understanding of how to service and repair hydrants at the lowest cost to you. Contact us