Although it is best to avoid mechanical failures with pipeline pumps, if the impeller does happen to crack, there is no need to worry. The impeller is typically a replaceable part and can be easily repaired or replaced by a qualified technician.
If a crack in the impeller goes undetected or is ignored, it could potentially lead to further damage to the pump or the pipeline itself. However, with proper maintenance and regular inspections, any issues with the impeller can be detected early on and addressed quickly.
In the end, a cracked impeller is not the end of the world and can be easily fixed. Just be sure to stay on top of regular maintenance and inspections to prevent any further damage or downtime to the pipeline pump.