Why is my built-in dishwasher not draining?

Question

I just installed a new sink disposal and ever since my dishwasher is not draining.  

There was a hose coming from the dishwasher to the disposal, and I connected it to the new disposal in exactly the same manner as the old one was, using the very same hose and clamp.  

The new disposal was basically the same make and model as the old one.

The disposal works fine, and the dishwasher goes through it's normal cycle, it's just not draining.

I have to believe the two are connected since they happened simultaneously, but I can't figure out what needs to change.  I checked the bottom of the dishwasher and don't see anything blocking anything.

Any ideas?

Thanks!

Anonymous · Accepted Answer

The new disposal has a metal plug inside you have to pop out with a hammer and screw driver.  If you look inside of the pipe fitting on the side of the disposal you can see it deep inside.  You will have to remove the disposal to do this unless you long pliers to remove the piece that you pop out.

richrozwalka · Answer

I knew what the problem was before I even read the whole question...
Remove the drain hose from the dishwasher from the side of the disposal.  Now try sticking your finger in it.  I bet it stops.  There is a plug in there that needs to be knocked out first.  Take a look at the instructions for the disposal.  You shouldn't need to remove the disposal to do this.  If you have room, just remove the hose and use a screwdriver or anything that you can fit in the hole and give it a sharp rap with a hammer.  Replace the hose.  Retreive the plug from inside the disposal (unplug first).  Plug it back in...You're done!

reba · Answer

Find out if your local plumbing code requires an Air Gap. Some do, some don't. If not, run the DW drain hose up over the inside top of the cabinet next to it as high as possible (this prevents back-siphonage). Then purchase a dishwasher tee and install it into the sink drain line before the trap. Hook the DW hose to the tee and you should be good to go. If you have a disposer, connect as previously mentioned.

Anonymous · Answer

Try checking if you knocked out your disposal D/W drain plug 
click on the slide #6
http://www.easy2diy.com/cm/easy/diy_ht_3d_index.asp?page_id=35743512

after you have checked all that make sure your drain from your dishwasher is looped to the highest point under your sink and STRAPPED it needs this for an air gap
http://www.applianceaid.com/pictools/drain_help.JPG

hope this helps
good luck  ;-)

Backspin · Answer

There is a plug at the disposal connection.  Once the plug is removed your problem will be solved.  Plug removal varies by manufacturer so check your installation instructions or owner's manual. Good luck.

katy · Answer

Make sure the hose goes 'up and over' something to a height of (I think 2 or 3 feet). There are height requirements for the hose to ensure that it drains properly. Something to do with physics and siphoning...

It's important though. Make sure the hose is hooked over something, as high as it was before you put in the new disposal.

Hope that helps.

Anonymous · Answer

srry

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Why is my built-in dishwasher not draining?

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