This document sets out the results from an archaeological watching brief at Eastney Sewage Pumping Station, Southsea, Hampshire, during the installation of new security fencing. It was carried out on the 14th July and 10th August 2021 by West Sussex Archaeology Ltd on behalf of Portsmouth City Council. The results revealed an iron pipe, probably carrying the existing water supply to the Beam Engine House, and a brick wall, possibly the side of a culvert linked to an early 20th century suction chamber.