The drain hose of the dishwasher is leaking

If the drain hose on the dishwasher leaks or becomes leaky, in the majority of cases it is due to improper connection. Another cause may be material fatigue and brittleness. After locating the damage, repairs of varying complexity are required, which should be done immediately.

Four potential damage points

There are four potential points of damage to the dishwasher, where a built-in dishwasher drain hose leaks:

  1. at the connection in the appliance
  2. at the connection on the drain
  3. at an extension coupling
  4. in the course of the hose through a hole or a crack.

If the drain hose on the dishwasher has been properly installed, damage to and in the hose can be virtually eliminated over a decade or more. The load on the dishwasher drain hose is relatively low.

If a hole or crack has nevertheless occurred, shortening the drain hose may be sufficient if there is sufficient reserve length and the “correct” location of the damage. If this is not possible, the hose must be replaced.

Also of interest: Change and improve the drain hose of a dishwasher

Leakage and wetness at the hose ends

The drain hose is attached to a nozzle in the dishwasher, which is located on the lye pump. Should any unusual behavior of the machine occur, such as “illogical” display elements, control diodes or signal lights switching on, it is essential to check immediately whether the inside of the machine is dry. Leakage inside the device can create conductive current bridges that lead to these faulty switching operations and signals.

There is usually a hose clamp around the end of the hose, which presses the hose firmly onto the spigot. When repairing, it is important to check that the hose is the proper diameter for the spigot. If the hose is just a little too wide, sealant such as hemp or rubber must be placed around the spigot before attaching the hose.

Also of interest: Repair the dishwasher drain hose without error

The same procedure is necessary when attaching to a branch pipe or spigot over a siphon. If the drain hose has been extended and a coupling installed, the proper fit must also be checked and resealed if necessary.

A classic is overtightening the fixing screw on the hose clamp. Check whether the screw “pulls” and the clamp is tight. If in doubt, fit a new clamp.

David Shaw

David Shaw

Dishwashers expert with over 10 years of experience. He writes articles and shares his knowledge on many sites. Helps you choose the best (portable, countertop, built-in) dishwashers on this site.

Dishwashers Review in UK