What fitting is needed to connect the water line to the back of the dishwasher. It has a plastic 3/4 or 1" pipe thread (I think) out the back side. It came with a standard brass elbow, but it seems to be missing a fitting to adapt to the plastic threads

Our Electrolux DX303 had an i50 error. It was due to a water leak causing earth leakage current. So it's good it stops working if it detects a leak.

Our leak was from where the water goes to the upper arm (the pipe is made of plastic and has a plastic thread which isn't strong ie cheap). The pipe is located on the back right hand side once you take off the panels.

If the supply line is leaking it could be a 3/8 supply line maybe the rubber washer built in the line is shot try replacing the supply line.they are about 15.00 at home depot.do not over tighten the new line you could damage it.some times people cross the thread types on these connection you have pipe thread and compression threads that is the best way to explain it I know of.Just make sure you pay attention to the threads.

It all depends on what material your water line is made of and where you want to shut the water off at.

Under the dishwasher there is a threaded connection from the water line to the dishwasher and there is typically no isolation valve located there. You will have to follow the supply line back to where it ties in, typically it is feed from the kitchen sink water supply. Hopefully the plumber who installed the lines provided a local shut off valve under the sink, otherwise you will have to shut the water off at the main house supply.

Here is a couple of ways to cap the line off.

Copper - You can get a cap and solder it on, make sure there is no water in the line because it will not heat up enough for the solder to penetrate the joint. Use flux and lead free solder on the copper lines. When you are ready to replace, just turn the water off, cut the cap off, and install the necessary fittings to connect the dishwasher. If I was going to do this, I would install a valve and a braided stainless steel line for the dishwasher. This makes it a snap to reinstall. Any hardware store can supply these parts.

Plastic (PVC/CPCV) - same as above but use the proper cement rated for the type of plastic pipe.

PEX - You can buy a plug and a clamp ring, but you will need the proper crimping tool.

If you have a threaded connection, just go to the hardware store and buy a threaded cap.

If you need specific information, please update your question with more details, because I am just speculating what you have.

Hello there:
Troubleshooting Leaks
If the dishwasher leaks, and you know the problem is not related to tub overfilling, the pump, or inlet valve problems, the plumbing connections may be faulty. Most dishwashers are connected to the water supply with metal pipe fittings, and the leak could be at these fittings. If the fittings are threaded, tighten them with an adjustable wrench. If this doesn't work, chances are the threads are stripped or the fitting is cracked or otherwise damaged. In this case, replace the fitting.
Most dishwashers discharge used water through a pipe or a hose connected to the drain or garbage disposer under the kitchen sink. If the drain line is made of flexible hosing, it may have cracked from prolonged exposure to hot water. Examine the hose; if it's damaged, replace it. If the hose is leaking at its connections with the disposer or dishwasher, tighten the fittings or clamps at the connections, or replace the clamps. Also check for water leaks around inlet valves, drain valves, and anywhere you see flexible hoses and hose connections. Leaks at clamps can be stopped by tightening or replacing the clamps. Leaks in hoses can be eliminated by replacing the hoses.
I HOPE THAT YOU FIND THIS INFORMATION VERY HELPFUL
BEST REGARDS MICHAEL

The supply line connects to the brass screw in fitting on the bottom left corner under the washer.

When you buy a dishwasher supply line kit, it will come with any adaptors needed. Unless you are using the steel braided line you will need to use teflon tape on the threads of the line. If you are using the SS line kit, you will only need tape on the adaptor.

Here is a pick of the line and the adaptor.


The drain line is attached with a typical hose clamp like this.



It is attached to the stub out on the garbage disposal if a GD is installed. If not then it is attached to the stub out on the drain pipe for the sink, like this.





Here is a pic of a drain line installed on a Garbage Disposal.

The water connection is the smaller of the two and generally near the front of the machine, usually a threaded fitting on a electric solenoid will need a pipe to compression 90 fitting if its not already installed, it needs to be hooked to the hot water and that can be found on the left side going up to the sink faucet to be sure run some hot water and the side that gets warm is the correct one, you will need to turn off the water and install a T to connect the dishwasher if an unused shut off is not already there for the dishwasher. The drain line takes a hose and clamp and will hook into your drain iether through a dishwaser t or the disposal if you have one has a connection for it.

hi If the dishwasher leaks, and you know the problem is not related to tub overfilling, the pump, or inlet valve problems, the plumbing connections may be faulty. Most dishwashers are connected to the water supply with metal pipe fittings, and the leak could be at these fittings. If the fittings are threaded, tighten them with an adjustable wrench. If this doesn't work, chances are the threads are stripped or the fitting is cracked or otherwise damaged. In this case, replace the fitting.
Most dishwashers discharge used water through a pipe or a hose connected to the drain or garbage disposer under the kitchen sink. If the drain line is made of flexible hosing, it may have cracked from prolonged exposure to hot water. Examine the hose; if it's damaged, replace it. If the hose is leaking at its connections with the disposer or dishwasher, tighten the fittings or clamps at the connections, or replace the clamps. Also check for water leaks around inlet valves, drain valves, and anywhere you see flexible hoses and hose connections. Leaks at clamps can be stopped by tightening or replacing the clamps. Leaks in hoses can be eliminated by replacing the hoses.
thanks....................

in some cases it is the water metering tank on the left hand side that gets bunged up and needs cleaning, next is the water feeding pipes. if everything is clean and the water valve supply is ok then it will need a special mod kit to be fitted, which will need to be fitted by a pro. tony.