WSAA is pleased to announce a revised water industry standard WSA 137 for maintenance shafts, maintenance chambers and maintenance holes is now available for comment.
WSAA is pleased to announce the publication of revised water industry standard WSA 137-2018 Issue 2. This is a Water Industry Standard for Maintenance Shafts and Chambers for Sewerage
WSAA is pleased to advise that Information and Guidance Note (IGN) DR WSA TN3 - Ring bending stiffness and allowable deflection of ductile iron pipe and steel pipe is available for comment.