Hello. My dad recently installed a new garbage disposal. Shortly after running my dishwasher, water started shooting out of the stop gap. I was able to discover the problem - they had forgotten to remove a plug in the garbage dispoal - and I was able to fix it by disconnecting the black hose and removing the plug. My dishwasher is now able to drain. My question and concern is I wonder if there was any damage or leaking under my dishwasher. I am unable to remove or pull it out to see. Does anybody know how the drainline out of the dishwasher is connected? Is there a chance that the backup from the disposal plug caused water to push back in the drainline back into the dishwasher causing leaks under the dishwasher? Or is the drainline connected inside the dishwasher? I am so afraid of any water damage. Many thanks for any help!

Hello. My dad recently installed a new garbage disposal. Shortly after running my dishwasher, water started shooting out of the stop gap. I was able to discover the problem - they had forgotten to remove a plug in the garbage dispoal - and I was able to fix it by disconnecting the black hose and removing the plug. My dishwasher is now able to drain. My question and concern is I wonder if there was any damage or leaking under my dishwasher. I am unable to remove or pull it out to see. Does anybody know how the drainline out of the dishwasher is connected? Is there a chance that the backup from the disposal plug caused water to push back in the drainline back into the dishwasher causing leaks under the dishwasher? Or is the drainline connected inside the dishwasher? I am so afraid of any water damage. many thanks for any help!
The drain hose is generally hose clamped under the dishwasher, and I can't see it leaking at this connection if the backup had another source (the airgap) to flow out of.

"I can't see it leaking at this connection if the backup had another source (the airgap) to flow out of"

But if there was a high loop and no air gap the pump would be working against itself. Having said that I agree with Growler that no damage was done either to the washer or the disposal. Regards, Tom

Thank you kindly for your responses!

Tom and Growler are both correct, very little chance of damage and I see Tom got his vote in for a high loop as opposed to an air gap. You can see under the washer by removing the 2 or 4 screws holding the kick plate. If you lay on the floor and look at the plate the screws are quite evident and easy to remove. Dad just put those screws in a few days ago. Dad wasn't the first guy to forget the knock out plug in a disposal.