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Old 01-13-2011, 02:26 PM   #1
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Final stages of Hooking up Dishwasher need advice


Hi

The Electrician Finally came and installed my outlet and the plug on the diswasher

I need to drill into the Kitchen sink base cabinet for the water supply and dishwasher drain hose now.

How many holes do I drill and where?? High or low

Can I drill one big hole and feed everything through that or do I drill a hole at the bottom for the water supply and a hole very high for the dishwasher drain hose.

Also if it's best to only drill one big hole,do I run any risk of the plastic melting with the stainless braided line.

I've never used owned a dishwasher so this is very new and wasn't sure,as they say water doesn't flow up hill but maybe that rule changes with dishwashers and drain hoses.

Thank-you for your time

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Old 01-13-2011, 02:43 PM   #2
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Final stages of Hooking up Dishwasher need advice


You can drill 1 hole low on the base cabinet to feed both HW and drain from/to DW.

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Old 01-13-2011, 03:19 PM   #3
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Final stages of Hooking up Dishwasher need advice


Drill 2 holes. One smaller low for supply, one bigger as high as you can for the drain. In your area code might even require a vacuum breaker next to where the sprayer goes. I personally don't use or like them.
You could run the supply line up high (one hole) but that would take a longer hose.
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Old 01-13-2011, 03:32 PM   #4
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Final stages of Hooking up Dishwasher need advice


So there you have it, 1 or 2 high or low, 1 high, 1 low, both lines high, both lines low.

Its really your preference. I chose low because that is where the connections are on the DW. Michaelcherr has a good point with the vacuum breaker, if you are interested in following code, I like Michaelcherr don't particulary like them.
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Old 01-13-2011, 03:47 PM   #5
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Final stages of Hooking up Dishwasher need advice


I would drill 3 holes!
But seriously, the instructions for the DW usually show where the manufacturer thinks they should be. When I can, I drill one big hole for both pipes.
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Old 01-13-2011, 04:54 PM   #6
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Final stages of Hooking up Dishwasher need advice


1 Big Hole Low. 2 or 21/2 inch need plenty of room when jockeying Dish Washer into place.
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Old 01-13-2011, 06:09 PM   #7
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Final stages of Hooking up Dishwasher need advice


Quote:
Originally Posted by michaelcherr View Post
Drill 2 holes. One smaller low for supply, one bigger as high as you can for the drain.
This is correct.
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Old 01-13-2011, 06:10 PM   #8
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Final stages of Hooking up Dishwasher need advice


my code requires an airgap, or since nobody likes them a loop in the drain line hose up to the underside of the countertop. b/c of this, i drill my drain at the very top, and a small hole for my water at the bottom.
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Old 01-14-2011, 06:35 AM   #9
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Final stages of Hooking up Dishwasher need advice


All My Utilities go through one big hole in the bottom as far back on the side as they can go then when I am installing or reinstalling after service as I am slowly pushing it back into place I am taking the slack out by pulling the Utilities through little at a time until the machine is ail the way in place.

All connections are made under the sink including air gap. All Utilities are flexible, IE: electric on a cord that plugs into 20 amp outlet under sink, stainless steel flex for water supply and corrugated plastic drain hose to air gap then to y drain under disposal.

It all works out good for service and repair if needed and eases installation.
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Old 01-14-2011, 07:01 AM   #10
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Final stages of Hooking up Dishwasher need advice


For you're hot supply line just use common sence with drilling the hole, But for your dishwashers drain line, it must be as high as possiable, if its not your going to having dirty water siphioning back into your dishwasher.
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Old 01-14-2011, 08:07 AM   #11
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Final stages of Hooking up Dishwasher need advice


Quote:
Originally Posted by Bigd3129 View Post
For you're hot supply line just use common sence with drilling the hole, But for your dishwashers drain line, it must be as high as possiable, if its not your going to having dirty water siphioning back into your dishwasher.
If you read my post again you will see where I reference the air gap under the sink cabinet. REREAD.
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Old 01-14-2011, 08:13 AM   #12
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Final stages of Hooking up Dishwasher need advice


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If you read my post again you will see where I reference the air gap under the sink cabinet. REREAD.
but you don't have the airgap itself under the sink right?
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Old 01-14-2011, 08:27 AM   #13
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Final stages of Hooking up Dishwasher need advice


Let me explain air gap as it pertains to me.

Discharge line comes through the hole down low that goes up to the sink rear where it's attached to a chrome air gap fitting that is screwed into the additional hole next to the faucets- it then goes from there to the drain stub under the dishwasher.

Another way to do this is to bring the drain hose through the cabinet hole and then take it all the way up as far as you can up under the sink lip secure it there then bring it back down to the drain stub.

Both ways prevent siphoning back .
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Old 01-14-2011, 08:30 AM   #14
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Final stages of Hooking up Dishwasher need advice


Quote:
Originally Posted by COLDIRON View Post
Let me explain air gap as it pertains to me.

Discharge line comes through the hole down low that goes up to the sink rear where it's attached to a chrome air gap fitting that is screwed into the additional hole next to the faucets- it then goes from there to the drain stub under the dishwasher.

Another way to do this is to bring the drain hose through the cabinet hole and then take it all the way up as far as you can up under the sink lip secure it there then bring it back down to the drain stub.

Both ways prevent siphoning back .
ok... sounded like you were leaving the airgap loose in the cabinet space. obviously a big no no
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Old 01-14-2011, 11:08 AM   #15
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Final stages of Hooking up Dishwasher need advice


Not germane to your question, but I'm curious: is it local code for a dishwasher to have a power cord with a plug? I've owned 10 houses in several places over the years and have never seen that. Disposal maybe, but not a dishwasher. Why would you ever need to unplug it?

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