# Durance Plumbing > WSSC-certified master plumber serving Montgomery County, Prince George's County, Anne Arundel County, and Washington DC. Licensed backflow prevention specialist (WSSC PFG-71643, MD #77820, City of Rockville #PLL-0001731, Pipeline Institute #23-0210, Anne Arundel #A2-2464). ## Services - Backflow testing & compliance (WSSC, DC Water, Anne Arundel County, City of Rockville): https://duranceplumbing.com/backflow-testing-compliance/ - Water heater installation & repair: https://duranceplumbing.com/water-heater-installation-and-repair/ - Drain cleaning and sewer services - General plumbing and gas fitting ## Service area Montgomery County MD, Prince George's County MD, Anne Arundel County MD, Washington DC ## Contact Phone: (301) 270-6663 Email: Kirk@DurancePlumbing.com