'Optimus' patent water closet, 1870.

Exton, David

'Optimus' patent water closet, 1870.
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

The 'Optimus', designed by Stevens Hellyer, introduced in 1870, was an improvement on earlier designs of water closet and had a more positive flush. Raising the handle opens a large flap-valve at the base of the pan and also turns on the flushing water.

© Science Museum / Science & Society Picture Library

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