Members of (CPDA) Clay Pipe Development Association:
Hepworth Clay (Wavin Ltd)
Hazlehead, Crow Edge, Sheffield, South Yorkshire S36 4HG
T: 01226 763561
E: drainage@hepworth.co.uk
W: www.hepworthclay.co.uk
W.T. Knowles & Sons Ltd
Ash Grove Sanitary Pipe Works, Elland, West Yorkshire HX5 9JA
T: 01422 372833
F: 01422 370900
E: sales@wtknowles.co.uk
W: www.wtknowles.co.uk