Liverpool Canal. Although water was originally taken from the canal, cleaner water supplied by Liverpool Corporation was in use by 1890, removing the need for a filtration plant. At this time two pumpsets were in use, and a third was being installed. Pressure was maintained by two accumulators, each with an diameter piston with a stroke of . The Practical Engineer quoted the pressure as , but this is unlikely to be correct by comparison with other systems. A second pumping station at Grafton Street was operational by 1909. The system ceased operation in 1971. Birmingham Birmingham obtained its system in 1891, when the Dalton Street hydraulic station opened. In an unusual move, J. W. Gray, the Water Department engineer for the city, had been laying pressure mains beneath the streets for some years, anticipating the need for such a system. The hydraulic station used Otto 'Silent' type gas engines, and had two accumulators, with an diameter piston, a stroke of and each loaded with a 93-tonne weight. The gas engines were started by a small hydraulic engine, which used the hydraulic energy stored in the accumulators, and all equipment was supplied by Ellington's company. Very few documents describing the details of the system are known to exist. Manchester & Glasgow The final two public systems in Britain were in Manchester, commissioned in 1894, and Glasgow, commissioned the following year. Both were equipped by Ellington's company, and used the higher pressure of . This was maintained by six sets of triple-expansion steam engines, rated at each. Two accumulators with pistons of diameter, a stroke of , and loaded with 127 tonnes were installed. In Manchester, the hydraulic station was built on the east side of Gloucester Street, by Manchester Oxford Road railway station. It was later supplemented by stations at Water Street and Pott Street, the latter now under the car parks of the Central Retail Park. At its peak in the 1930s, the system consisted on of pipes, which were connected to 2,400 machines, most of which were used for baling cotton. The system was shut down in 1972. In Glasgow, the pumping station was at the junction of High Street and Rottenrow. By 1899, it was supplying power to 348 machines, and another 39 were in the process of being completed. The pipes were in diameter, and there were around of them by 1909, when of high pressure