In London he built Marchants Water Works, rebuilt London Bridge Water Works and carried out improvements to the New River. Among his many innovations were pumps worked by water‑wheels which rose and fell in accordance with the level of the stream.
In London, he constructed Marchants Water Works, reconstructed London Bridge Water Works, and implemented improvements to the New River. Among his numerous inventions were pumps driven by water wheels that moved up and down in sync with the stream's level.