Unvented Cylinders are famous for providing great water pressure that makes the water flow satisfying. Moreover, one can install an Unvented Cylinder almost anywhere and it will still work effectively because it utilizes mains pressure along with gravity. Such cylinders are a great idea to install at any pipework. However, if they cause problems in terms of water storing, heating or with their flow then you must call us. At A S Plumbing and Heating Engineer, our heating engineers provide the best solution in the repair of ducts and vents. The Unvented system’s performance is great as the mains water supply available. To this effect the maximum possible water demand should be assessed, with the knowledge that the mains supplies both hot and cold services simultaneously. Moreover, the water heater itself operates at a pressure of 3 bar, controlled by the inlet control set, and is capable of delivering over 50 litres per minute. It is because of the high quality inlet control set design that has made it possible to make the most of the flow rates available. Unvented hot water systems have a continuing maintenance requirement in order to ensure safe working and optimum performance. It is essential that the relief valve(s) are periodically inspected and manually opened to ensure no blockage has occurred in the valves or discharge pipework. Similarly cleaning of the strainer element and replacement of the air in the expansion vessel will help to prevent possible operational faults.