Kitchen Large Electric Appliances - New dishwasher installation

Hi all,

I'm in the middle of a kitchen remodel and getting the waler lines ready for the dishwasher installation. I would like the dishwasher to have a separate shut off valve.

First - Am I correct in assuming that the plastic type fittings and lines, commonly used in ice maker installation, are totally unsuitable for hot water?
Second - Do I really need to use flexible copper line or is flexible reinforced plastic (?) line good enough. Some of it at HD comes with metal mesh sheathing.
Third - Are compression fittings good enough or do I really need to sweat pipes?
Fourth - The house has 1/2" copper feed line to the kitchen sink. Do I need to stay with 1/2" or is 3/8" at the dishwasher good enough?

Thanks

Hi all,

I'm in the middle of a kitchen remodel and getting the waler lines ready for the dishwasher installation. I would like the dishwasher to have a separate shut off valve.

First - Am I correct in assuming that the plastic type fittings and lines, commonly used in ice maker installation, are totally unsuitable for hot water?
Second - Do I really need to use flexible copper line or is flexible reinforced plastic (?) line good enough. Some of it at HD comes with metal mesh sheathing.
Third - Are compression fittings good enough or do I really need to sweat pipes?
Fourth - The house has 1/2" copper feed line to the kitchen sink. Do I need to stay with 1/2" or is 3/8" at the dishwasher good enough?

Thanks

1. A shutoff valve is installed in the hot water supply under your kitchen sink, normally. It tee's off of your hot water line that goes to your kitchen sink.

2. Someone at the home center can tell you what valves and fittings to get, and that stainless braided flexible supply line that now is most commonly used, that goes between the shut-off valve you install under the sink (it is installed right along, and just up a bit from the bottom of the cabinet, where you store your cleaners), and the dishwasher fill-valve.

3. Then a sink deck air gap(this is the usual method. Another method is to construct a separate 1 1/2 inch standpipe, with it's own trap, under the sink, that you hang the diswhasher hose down in, and secure it so it does not fly out of the pipe) is installed for the drain in the 4th sink hole up on the faucet deck.

4. Then you need drain hose that goes from the discharge pump on the dishwasher, and goes through the same sink cabinet hole the braided stainless goes through, and the drain hose then hooks up to the underside of the deck-mount airgap, under your sink. Then you have another rubber hose that hooks up to the 2nd connection on the air gap, and either goes into a special tailpiece adapter that is installed in-line with the vertical drain pipe coming down from the sink basket - or - that 2nd piece of drain hose can be plugged directly into a garbage disposer. If you do that method, you will find a port on the side of the disposer. You drive out the potmetal plug inside, and then hook up the hose.

4. The designated electrical hookup. And you are done.

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Any plastic used for hot water would have to be hot water suitable. Ask you home center when you buy parts.