Nine models by Doulton, including straight pipe and section, two bends and one sectioned bend, simple junction, multiple junction and two traps. Henry Doulton Works, Lambeth, manufactured 'stoneware' or vitrified pipes to connect homes to the sewers. Edwin Chadwick, in association with John Roe, pressed for the use of egg-section sewers, which increased the velocity of the sewage passing through and increased their carrying capacity. Later, these sewers were supplemented with glazed earthenware pipes.
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