I have a problem when I export the model from watercad (in CMH) to Epanet the numbers are changed to L/S, even if i choose CMH in the epanet.
For example: in watercad it is 1440 CMH while in the epanet it is still stays 400 even if the units are set to CMH. What should I need to do ?
Every model variable field which contains flow data in cmh should be manually multiplied by 3.6, that will give you a proper cmh epanet export model. This includes base demand, fcv settings, pump definitions and GPV headloss curves for example. However, this is quite a cumbersome work-around, I agree with you that this should be done automatically when exporting the model to EPANET.