scope:

This standard deals with work to improve the performance of underground drainage and sewerage systems and related structures fully or partially incorporating the existing system.

This standard does not cover

- work involving renovation using centrifugally cast cement mortar,

- ground water lowering work (see DIN 18305),

- the installation of underground drainage and sewerage systems (see DIN 18306),

- laying of pressure pipework (see DIN 18307),

- grouting operations to fill cavities in the ground or in rock from the sewer or from other structures (see DIN 18309),

- the repair or strengthening of components of the drainage or sewerage system using concrete or similar materials applied by spraying and compacting in one operation (see DIN 18314),

- trenchless pipelaying using the bursting techniques or microtunnelling (see DIN 18319),

- work to preserve and repair concrete structures and components (see DIN 18349),

- laying of tiles and slabbing in drainage or sewerage system components or structures (see DIN 18352),

- plumbing work associated with the installation of pipework for gas, water and drainage services inside buildings and other structures (see DIN 18381).

DIN 18299, clauses 1 to 5 shall also apply. In cases where the specifications of DIN 18299 contradict the present standard, DIN 18326 shall take precedence.