How to Hook Up a Portable Dishwasher to a Kitchen Faucet
Step-by-step instructions for connecting a portable or countertop dishwasher to your kitchen faucet, which adapter you need, and how to disconnect it safely.
Hooking up a portable dishwasher sounds technical, but after the first time it takes about 30 seconds. All you need is the right faucet adapter, and that’s the only part that takes a little figuring out.
These steps also work for most countertop dishwashers that connect to the faucet. Always check your dishwasher’s manual too, since hoses and connectors vary by brand.
What you’ll need
- Your dishwasher’s quick-connect hose (also called a unicouple), which comes with it
- A faucet adapter that matches your faucet’s threads (often included)
- Pliers or a cloth to remove the aerator, if it’s tight
- Plumber’s tape (optional)
First, check your faucet
Look at the end of your kitchen faucet. Most have a small screen called an aerator that unscrews. That’s where the adapter goes.
- Standard faucets with a removable aerator usually work.
- Pull-down or pull-out spray faucets often don’t have standard threads. You may need a special adapter, or a countertop model with its own water tank.
- Threads can be male (on the outside) or female (on the inside). Adapters come in both types, so check which one your faucet has before buying.
Step by step
1. Remove the aerator
Unscrew the aerator from the faucet tip, turning counterclockwise when looking up at it. If it’s stuck, wrap it in a cloth and use pliers gently. Keep it somewhere safe, along with its small rubber washer, so you can put it back later if you need to.
2. Screw on the faucet adapter
Thread the adapter onto the faucet by hand until it’s snug. If it drips later, add a couple of wraps of plumber’s tape to the threads. Many people leave the adapter on permanently; it doesn’t get in the way of normal use.
3. Roll the dishwasher into place
Bring the dishwasher close to the sink so the hoses can reach without stretching. Plug it into a grounded outlet. Avoid extension cords unless the manual says they’re OK.
4. Attach the quick-connect hose
Pull down the collar on the quick-connect fitting, push it up onto the faucet adapter, and release the collar. It should click into place. Give it a gentle tug to make sure it’s secure.
5. Position the drain hose
On most models, the drain hose is part of the same connector and empties through it into the sink. If yours has a separate drain hose, hook it securely over the edge of the sink so it can’t flip out.
6. Run the hot water first
Turn on the hot tap and let it run until the water is hot. This means the dishwasher fills with hot water from the start, which cleans better. Leave the faucet on.
7. Start the cycle
Load the dishwasher, add detergent and start it. Keep the faucet running hot for the whole cycle. Don’t use the faucet for anything else unless your adapter has a pass-through for that.
Disconnecting afterward
- Turn off the faucet.
- Release the pressure. Most quick-connect fittings have a small red button. Press it to let out pressure; a little water may spray into the sink.
- Pull down the collar and remove the connector from the faucet.
- Drain any leftover water from the hoses into the sink, then store the hoses in the dishwasher’s back compartment.
Never disconnect the hose while the dishwasher is running or before you’ve released the pressure.
Troubleshooting
Water leaks at the faucet. The adapter may not be tight, or it’s missing a washer. Remove it, check the washer, add plumber’s tape and reattach.
The connector won’t click on. Make sure you’re pulling the collar fully down as you push up. The adapter may also be the wrong size or thread type.
The dishwasher isn’t filling. Check the faucet is on and the hose isn’t kinked. Low water pressure can also cause slow filling.
Dishes aren’t getting clean. Run the hot water before starting, don’t overload the racks, and clean the filter. Here’s how to clean a dishwasher filter.
Still deciding which type to buy? See countertop vs portable dishwashers, or our picks for the best compact dishwashers.