What's going on
Rolling portable dishwashers and many countertop models fill straight from the kitchen faucet. You take off the faucet's aerator, screw a threaded adapter on in its place, and snap a quick-connect coupling onto the adapter. The hose brings hot water in and carries drain water back to the sink. Every joint depends on a small rubber washer, and faucets differ in thread size and in whether the threads are on the inside or the outside. An adapter that almost fits will drip, or spray.
Many pull-down and pull-out faucets have no threads an adapter can grab, so they may not work with this setup at all. Pressure also builds up in the hose while the unit runs, so if you pull the coupling off without releasing that pressure, you'll get a face full of water.
What you can check in five minutes
- Turn the faucet off, press the release button on the coupling to let the pressure out, then disconnect.
- Unscrew the adapter and check the rubber washer. It should be there, flat and not cracked.
- Thread the adapter back on by hand, keeping it straight. Snug it by hand only, because plastic threads crack when they're forced.
- Compare the adapter with your faucet's threads. Hardware stores carry adapters for different faucet threads.
- Open the hot water slowly instead of turning it on full.
- Look over the hose near the coupling for cracks or bulges.
- Secure the drain hose in the sink so it can't flip out partway through a cycle.
Rent, own or co-op: who handles it?
A portable dishwasher doesn't need any plumbing work, which is why renters like them. You're still usually responsible for leaks your own appliance causes, and some leases or building rules mention added appliances. Check your lease or ask your building before you roll one in.
What a technician will look at
- •The unit's inlet valve and internal hoses
- •The coupling hose assembly and its connections
- •The door gasket and tub seals, if water shows up under the unit instead of at the faucet
- •Drain pump operation
- •Whether your faucet can work safely with this kind of connection
Andre's field note: Most leaks at the faucet I'm called about turn out to be a flattened washer or an adapter threaded on crooked. Both are quick to fix. Many portable washers use the same faucet connection, and they have the same problems. If water is coming from under the dishwasher itself, stop using it and book dishwasher repair.
Faucet hookup still dripping? Call ProFix NYC at (929) 699-8358.