The Gully Guard and The Department of Civil and Structural Engineering at The University of Sheffield.

The capability of an installed Gully Guard to assist in protecting the drainage system from both sediment and chemical pollutants while maintaining its function to assist in preventing surface flooding has been proven following extensive testing by The Department of Civil and Structural Engineering at The University of Sheffield. 

The test results suggest that the Gully Guard is very effective in capturing the 97% of the total sediment that may enter a gully pot in a storm event, as well as retaining most of the organic chemicals and a wide range of heavy metals and other inorganic chemicals.