Water Age in EPANET 2.0 vs 2.2

I have a very simple network and running a water age analysis. However, the water age results are significantly different between EPANET 2.0 vs 2.2. The water age results from EPANET 2.2 is correct. Any ideas why EPANET 2.0 result is incorrect?


could be related to this issue? Mass Imbalances in EPANET water-quality simulations


Yes, I believe this is the case. Lowering time steps seems to help somewhat, however it does increase runtime.

Do you know if this mass imbalance issue has been resolved in Epanet 2.2?


Yes, EPANET 2.2 resolves the issue to the best of our knowledge.