What type of copper pipe adapter do I need?

Question

I'm trying to install a new dishwasher but the pipe fitting used to feed hot water to the new machine is a 1/2-in while my old one used a 3/8-in pipe. Home depot said there was No adapter and my only choice was to spend 80 bucks on new copper tubing but I want a second opinion.

Answer 1

dishwashers have a 3/8 female iron pipe thread (fip) you can use a 3/8 fipX 3/8 compression adapter or a 3/8 fip X 1/2 compression adapter. Any plumbing supply house will have these. If you need to change sizes, you can get a 1/2 conp. X 3/8 conp adapter. What you want to ask for is a dishwasher ell if it has a 90 degree bend.NOTE; all dishwashers have 3/8 fip coming out of solenoid  

Answer 2

Just do it right and start at the hot valve and replace the valve with a two way angle stop or a tee and a extra valve run the line in steel braided 1/2 inch hose it is much better because you can move the dishwasher in and out with ease and there are little room for leak causing errors. When you are dealing with water and it is inside your house you should always use tthe best quality parts and replace everything whenever you can. It is cheap insurance .I have seen so many houses that were devistated bad from simple blowouts under and behind plumbing fixtures and they costed alot more to fix than 80 bucks.          I hope this helps  

Answer 3

I know I have seen them before, here is a link so you know they are out there.

Answer 4

There are a couple of issues you will need to deal with. First is that the solenoid that allows water into the dishwasher almost always has a female threaded opening at the bottom. This requires an elbow with male to male threads. It is never supplied with a new dishwasher so you'll need to purchase one. Secondly, depending on the distance from the hot water shutoff to the elbow at the front of the dishwasher you probably can buy a braided steel water supply line for about $20. You'll need to know the length as well as get the right sizes of compression nuts that they come with. Typically you'll need 3/8" or 1/2" compression for the end attached to the shutoff and 3/8" compression for the elbow you need to buy. If you can't tell the size on the shutoff end, remove the pipe and take it with you. Don't forget Teflon tape as well.

Answer 5

You need 1/2" bendable copper from the hot water line under the sink to the dish wash.  I find it hard to believe that's $80.