A portable or countertop dishwasher can use a kitchen faucet only when its specified adapter and connection are compatible with that faucet. Check the appliance and faucet instructions before fitting a quick connector. Use the supplied hose arrangement, follow pressure-release instructions before disconnecting, and do not improvise adapters or assume every pull-out faucet can carry the hookup.
Match the adapter to the faucet
Danby's cited DDW621WDB and DDW631WDB/DDW631SDB manuals show a faucet adapter and quick-connect assembly. They describe compatibility with the specified externally or internally threaded faucet arrangements. Those diagrams support those countertop models, not every portable machine or modern faucet.
A pull-out spray head, unusual aerator thread or faucet-mounted filter requires confirmation from the faucet and appliance makers. Do not force an adapter that starts crooked or improvise a stack of fittings. Matching an apparent diameter does not establish the required thread, seal or operating suitability.
Keep the inlet and outlet hoses in their intended paths
The Danby instructions identify different connections for incoming water and drain water on the quick connector. Connect them only as that model's diagram requires and inspect the visible hoses for kinks or damaged fittings. Do not swap their positions to make the unit fit on the counter.
This temporary faucet connection differs from the permanent plumbing in installing a dishwasher water line. The appliance manual and local installation requirements still control its arrangement. What a dishwasher air gap does explains why drainage protection is a separate concern from a hose that fits.
Release pressure before removing the connector
Turn off the faucet and follow the exact appliance's pressure-release instructions before detaching its quick connector. The cited Danby manuals warn that disconnecting without relieving pressure can produce pressurized spray and scalding water. Do not yank the connector free or loosen hose joints to relieve pressure.
Check the manual's water temperature, pressure and electrical requirements before the first run. An extension cord or wet electrical connection is not a solution to a short cord; use the appliance's approved power arrangement.
When a different installation is needed
If the faucet manufacturer cannot approve the adapter arrangement, choose an appliance or plumbing layout designed for the available connection. Changing a supply, drain or outlet can involve separate plumbing and electrical work. For leaks or an abnormal cycle, why a dishwasher leaks helps separate the incoming connection from its drain and appliance problems.