City Plumbing & Gas Services Nottingham & Derby are a plumbing, central heating and gas specialists, experienced in all aspects of plumbing and heating services including central heating, power flushing and boiler replacement services to name a few. Situated between Nottingham and Derby, City Plumbing & Gas Services provide a complete plumbing service. Installation, repair and servicing of all types of central heating systems, Combi boilers, Condensing boilers, open vent hot water systems and oil boilers.