Dating from 1887, it contains two 150 hp James Watt & Co. beam engines.

[2] The pumps were built as part of a plan to improve Portsmouth's sewage system.

[3] The other element of the plan was large holding tanks which held the sewage until the pumps could empty them into the ebb tide.

[4] The Engine House is now open to the public[3] as a museum, owned by Portsmouth City Council (Museums Service) but operated by volunteers; consequently is only open on the last weekend in every month.

This article relating to a museum in the United Kingdom is a stub.