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Identifying a Leaking Water Supply Line

If there's water pooling (or flowing) from the bottom of your dishwasher, a leaking water supply line is likely to blame. Leaking lines will need to be replaced before damage is done.

Why Do Dishwasher Supply Lines Leak?

The dishwasher water supply line connects from the main water supply to your dishwasher and feeds it fresh water. The line is always under pressure, so if any gaps, cracks, or holes open in the water supply line, it will start to drip. That drip eventually leads to big puddles and even bigger headaches if you don't catch it quickly.

How to check for a leaking water supply line

  • Make sure that no one can turn it back on while you're working. If you can't turn off the electricity for any reason, assume that every wire is hot with electrical power and be very careful.

  • At the base of your dishwasher, there is a panel that blocks the plumbing under the dishwasher. Remove the two screws holding the panel in place, then take off the panel.

  • Check under the panel to see if the leak is coming from the lines or the dishwasher itself. If it's coming from the main water line, you'll see dripping even with the dishwasher off.

  • If you don't see any active drips, clean up the puddle to make it easier to spot leaks. Once the area is dry, turn the dishwasher back on. Be careful not to touch any wiring while the dishwasher is running. Use a flashlight to look under the dishwasher and watch for new leaks as it goes through the various cycles.

    If the dripping isn't coming from one of the tubes, that means the dishwasher itself is leaking. If it drips only when it's draining water, then the drain line is your culprit.

If you haven't determined the cause of your leak, consider other reasons for water under the dishwasher.

What To Do If Your Dishwasher Water Supply Line is Leaking?

If your dishwasher water supply line is leaking, you'll need to have the gap, crack, or hole repaired or else the line will need to be replaced.

NOTE: This content is for informational purposes only, and HomeX and its affiliates disclaim all liability related to it. If you decide to perform any tasks based on this information, you assume all risks, including the risk of loss or damage to property or personal injury.

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