Dishwasher installation is a relatively straightforward task if you follow the appliance manufacturer’s product manual step-by-step directions and pay attention to detail. The process involves removing the old dishwasher, shutting off water and power to it, disconnecting the existing line from the sink faucet and connecting the new line. Once the new dishwasher is installed, make sure it’s flush with the cabinet fronts and level. Then run a test cycle to check for leaks and to ensure the electrical connections are secure.
Begin by shutting off the electricity to your dishwasher and removing any screws that attach it to the countertop and cabinetry. You should also turn off the water supply valve under the sink and the shut-off valve for your house plumbing. This will prevent water from flowing while you’re installing the dishwasher, preventing damage to your home’s plumbing.
Once you’ve removed the old dishwasher, remove any tape covering the dishwasher’s bottom openings. Next, open the access panel on the back of the unit and remove the plastic shipping brace attached to it. Slide the dishwasher forward to expose the lower opening and a metal junction box with three wire connections. Unscrew the cover and carefully make the three wire connections: green wire from the power cord to the dishwasher’s grounding screw, white neutral wire to the dishwasher’s white lead and black hot wire to the dishwasher’s black lead using twist-on wire connectors (wire nuts). Replace the cover on the junction box and screw it back in place.
Connecting the dishwasher to the water supply line
Before proceeding, locate the inlet on the dishwasher, which is usually a round hole with threads inside of it. The inlet may have male threads or female threads; if the latter, you’ll need to use an adapter for your water line. You’ll also want to make sure there’s a 90-degree bend in the water line coming out of this inlet, which can be accomplished by either purchasing a water line with a built-in 90-degree elbow or by installing one separately on the end of your existing line.
You should also ensure that the drain hose is positioned higher than the drain inlet. This will prevent backwash from the sink drain from entering the dishwasher and help keep your kitchen clean.
Installing the Drain Hose
Some dishwashers will have the drain hose already connected, while others require you to press it onto the drain outlet and then attach it with a clamp. The type of clamp varies by brand, so refer to your dishwasher’s product manual for specific instructions.
If the dishwasher is being installed in a new location, you’ll need to install a new drain hose by routing it from your house plumbing and down through the floor and underneath the cabinets to the dishwasher. For best results, use a stainless steel, braided water supply line with an appropriate length for your kitchen, which can be purchased from a local hardware store.
If you’re relocating an existing dishwasher, connect the new line to the inlet on the bottom of your kitchen sink and the dishwasher drain outlet, then turn on your water at the shut-off valve to test for leaks. If everything’s tight and in good shape, turn on the power to your dishwasher, and then start washing dishes.
source https://flowlinkplumbing.wordpress.com/2025/02/08/dishwasher-installation-how-to-install-a-dishwasher-8/
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