DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Plumbing Forum > Dishwasher Drain




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 04-20-2008, 05:29 PM  
cibula11
Senior Member
 
Join Date: Dec 2006
Posts: 331
Default Dishwasher Drain

We are remodeling our kitchen and are replacing the DW. The current dishwasher drains into a pvc drainpipe. Is there a reason why this was done instead of connecting it to the disposal?
When we replace the DW can we connect the drain to the disposal and if we do what should we do with the drain? (cap it??)



__________________
cibula11 is offline  
 
Reply With Quote Quick reply to this message
Old 04-20-2008, 07:26 PM  
hondadrv24
Senior Member
 
Join Date: Feb 2008
Posts: 188
Liked 1 Times on 1 Posts

Default

Don't see any reason why you couldn't cap that old pipe and run the dishwasher to the disposal.



__________________
hondadrv24 is offline  
 
Reply With Quote Quick reply to this message
Old 04-20-2008, 10:35 PM  
glennjanie
Senior Member
 
Join Date: Mar 2006
Posts: 2,990
Liked 2 Times on 2 Posts

Send a message via AIM to glennjanie
Default

Hey Cibula:
I strongly recommend an air gap on the countertop for the Dishwasher drain. It will prevent back siphonage and a lot of sickness.
Glenn

__________________
glennjanie is offline  
 
Reply With Quote Quick reply to this message
Old 04-21-2008, 07:50 AM  
cibula11
Senior Member
 
Join Date: Dec 2006
Posts: 331
Default

Will running the DW waste line to the top of the sink cabinet and attaching it at the top be sufficient?

__________________
cibula11 is offline  
 
Reply With Quote Quick reply to this message
Old 04-21-2008, 04:12 PM  
glennjanie
Senior Member
 
Join Date: Mar 2006
Posts: 2,990
Liked 2 Times on 2 Posts

Send a message via AIM to glennjanie
Default

Hey Cibula:
The bottom of the disposal is above the bottom of the dishwasher, creating a perfect setup for siphoning. Without an air gap the 'loop' has to be over 31' high to prevent backsiphonage.
Glenn

__________________
glennjanie is offline  
 
Reply With Quote Quick reply to this message
Old 04-22-2008, 09:27 AM  
cibula11
Senior Member
 
Join Date: Dec 2006
Posts: 331
Default

So other than looping, what is the method to install an air gap?

__________________
cibula11 is offline  
 
Reply With Quote Quick reply to this message
Old 04-22-2008, 04:22 PM  
kok328
Supporting Member
HRT_SUPPORTER.png
 
Join Date: Nov 2007
Location: Grand Blanc, MI
Posts: 2,168
Liked 100 Times on 88 Posts
Likes Given: 61

Default

I don't believe an air gap will be necessary as the DW has a check valve on the drain discharge. Just loop the discharge hose so that it creates a P-trap effect under the sink and you should be just fine.

__________________
kok328 is online now  
 
Reply With Quote Quick reply to this message
Old 04-22-2008, 04:31 PM  
glennjanie
Senior Member
 
Join Date: Mar 2006
Posts: 2,990
Liked 2 Times on 2 Posts

Send a message via AIM to glennjanie
Default

Hey Cibula:
KOK may be correct, just check the owner's manual and make sure the check valve is there.
If there is not a check valve mentioned in the book you will need to go to the HD or L or a plumbing supplier and ask for a dishwasher air gap. It will be an aparatus about a foot long with two different size places to connect to the bottom and will have a chrome hood on top. If your sink has a hole cover on it you can remove it and mount the air gap. If there is no hole you will need a 1 1/2" hole to mount it. The small part connects to the dishwasher drain and the larger one to the disposall. It will not interfere with the draining but when the pump shuts off the disposall side drains down and can't siphon back into the dishwasher. I sure don't want the contents of my disposall running in my dishwasher.
Glenn



__________________
glennjanie is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Dishwasher not draining completely cougar_67 General Appliance Discussion 12 05-21-2013 11:07 AM
Bleach in cast iron floor drain? Bwildly Plumbing Forum 2 11-21-2008 09:55 PM
Frigidaire Dishwasher drain pump noise? supturb89 General Appliance Discussion 2 08-06-2008 06:23 AM
Floor Drain Question for GlennJanie manhattan42 Plumbing Forum 2 07-17-2006 11:46 AM
Floor Drain question Mudball Plumbing Forum 9 06-24-2006 10:04 PM