Kitchen Remodel · Intermediate

How to Install a Dishwasher

Swap or add a dishwasher with code-compliant water, drain and electrical connections.

12 min read Reviewed by prosUpdated March 2026

Tools needed

• Adjustable wrench
• Screwdriver
• Level
• Voltage tester

Materials

• Dishwasher
• Braided supply line
• Drain hose + high loop clamp
• 90° brass elbow
• Air gap (CA + some other states)

1
Shut off water and power
Close the hot supply valve under the sink and flip the dishwasher breaker off. Verify with a tester.
2
Attach the 90° elbow and supply line
Wrap threads with 2 wraps of Teflon tape. Attach a 90° brass elbow to the water inlet, then the braided supply line.
3
Position the drain hose
Route drain hose to the sink drain or disposal. Make a HIGH LOOP secured to the underside of the counter — this prevents siphon backflow.
4
Wire electrical
Most 2026 dishwashers hardwire under the toe-kick. Match black to black, white to white, ground to ground. Cap and secure.
5
Slide in, level, secure
Push into the cabinet opening. Level side-to-side and front-to-back using leg adjusters. Secure to the countertop or side cabinets with the included brackets.
6
Turn on and test
Open water, restore power, run a rinse cycle. Check under-sink connections and toe-kick for leaks at 5, 15 and 30 minutes.

Safety note: this guide is educational. Always follow local building codes, pull required permits, and hire a licensed pro for structural, electrical, gas or plumbing work when in doubt.