This became popular in the early 1960s, when a guide rail system was developed to lift the submersible pump out of the pump station for repair, and ended the dirty and sometimes dangerous task of sending people into the sewage or wet pit.
The practice became widely adopted in the early 1960s, with the introduction of a guide rail system that enabled the safe removal of the submersible pump from the pump station for repairs, thereby eliminating the perilous and unhygienic task of sending personnel into the sewage or wet pit.