This is the covered reservoir originally belonging to the Toxteth and Harrington Waterworks company.  It is sited between Toxteth Town Hall and the Catholic chuch of Our Lady of Mount Carmel.  Letitia Street runs between. In earlier times this, the highest point in Toxteth, was the source of the Dingle Brook which rans into the Mersey at Knotts Hole.

The covered reservoir retaining walls and corner tower have been listed grade II buildings since 1975.