Description of Damage
Flow obstacles are objects or materials lying in the cross section of the pipe, which project into it or cross through it in such a manner that the cross section required for a proper flow of the sewage is no longer completely available.
Properly integrated components such as reducers, throttling or back-up flaps do not constitute discharge obstructions in the sense of a damage.
Typical flow obstacles often found in practice are [ATVM143-1:1989] :
- Hardened depositing;
- Incrustation (Image 2.4.2-1) (Image 2.4.2-2) (Image 2.4.2-3) ;
- Projection flow obstacles;
- Root growth;