Can anyone tell me if the Kitchen aid dishwasher KUDPFL01BL5 comes with a check valve in the drain hose? I found two drain hoses, one with and one without.

I am planning to replace the chopper assembly (dirty dishes on the upper shelf); also suspect the drain hose, if it is draining waste back into the dishwasher through a leaky check valve, if there is one. I did find another check valve inside the sump well near the chopper assembly. Don't know if there is a second check valve on the drain hose.

Thanks for any help -- I found two drain hoses for this model, one with and one without a check valve. Grrr.