Members of (CPDA) Clay Pipe Development Association:

Hepworth Clay (Wavin Ltd)

Hazelhead, 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

Naylor Drainage

Clough Green, Cawthorne, Barnsley, South Yorkshire S75 4AD
T: 01226 790591
F: 01226 790531
E: info@naylor.co.uk
W: www.naylor.co.uk