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How to Install a Dishwasher Drain Hose

DishwasherDishwashers are complex pieces of machinery, and any misstep in their setup could result in a variety of problems including flooding, unclean dishes and unusually noisy wash cycles. The dishwasher drain hose is an essential piece of the puzzle, but it must be installed correctly to expel water and perform its job effectively. Homeowners may be able to install a dishwasher drain hose on their own, but shouldn't hesitate to call a plumbing professional for assistance.

Replacing the hose

For this project, you'll need pliers, a bowl, a nut driver and a stainless-steel hose clamp. First, you'll use the pliers to disconnect the current hose from the T-fitting underneath your kitchen sink. Drain water from the old hose into a shallow bowl, and use the nut driver to remove the old hose from the dishwasher. Secure the new hose to the discharge port with a stainless-steel hose clamp. The hose should be run as high as possible in your cabinet, forming an arcing loop, which you can affix with clamps. Once you've connected the hose to the T-fitting on the sink's drainpipe, run the dishwasher a couple of times with hot water to flush out the hose. There should be no dishes in the appliance during these initial cleanings.

Things to consider

While the dishwasher drain hose installation process may seem straightforward, there are some common mistakes associated with this project. It's important to ensure that the drain is connected to the sewer side of the P-trap. The water that sits in the P-trap prevents sewer gases from entering the house and the dishwasher. Double check to verify that you’ve affixed the hose to the correct side.
Another issue that many plumbing professionals see is the absence of a high loop. Every dishwasher manufacturer requires the hose to be affixed as high as possible under the countertop to drain the water properly and keep your appliance running effectively. The high loop also prevents water from flowing back into your dishwasher or siphoning out during operation. If you're installing a dishwasher drain hose, make sure that you're adhering to these regulations.

Hooking up a dishwasher drain hose appropriately is critical to the appliance's continued performance. Don't hesitate to call a plumbing expert for assistance with dishwasher drain hose installation. Call a Roto-Rooter plumbing professional to set up your dishwasher drain hose and address and other plumbing issues you may have.

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