Profile: Universal Heating Services Ltd specializes in central heating systems installation and oil & gas boiler installation, maintenance & repair services. Our heating & plumbing system services include boiler replacement, fitting of conventional & combination boilers & central heating systems, radiators replacement, thermostatic radiator valves, tower rails and replacement of fire-fronts for baxi & some glow-worm boilers. Un-vented (mains pressure) water storage cylinders are fed directly from the incoming cold water main supply. No cold feed tank is needed, but an expansion vessel is usually required to absorb the expansion as water heats up. These un-vented water storage cylinders are made of high-grade stainless steel and are ideal for houses with several bath / shower rooms. The high pressure delivered from un-vented cylinders is ideal for supplying showers.