E29
Kraus Backflow or Overpressure from Dishwasher Drain

Kraus garbage disposal runs but water leaks only when the dishwasher is draining.

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Possible Causes

Loose dishwasher hose connection, Blocked disposal discharge causing backpressure, Improper high-loop or air gap installation, Cracked dishwasher hose

How to Fix / Troubleshooting

Safety First: Turn OFF power to both disposal and dishwasher.

  • Step 1 – Inspect dishwasher hose: Check the hose from dishwasher to disposal for cracks, loose clamps, or kinks.
  • Step 2 – Verify high loop/air gap: Ensure the dishwasher drain hose has a high loop under the countertop or is connected through an air gap to prevent backflow.
  • Step 3 – Clear disposal outlet: Confirm that the disposal discharge and P-trap are not clogged, which can cause dishwasher water to back up and leak at connections.
  • Step 4 – Tighten or replace hose: Tighten clamps and replace any damaged hose sections. Test by running a dishwasher drain cycle.
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Repair Difficulty

Easy 2/5

Required Part

Dishwasher Drain Hose & Clamp
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