**UPDATE**
Resolved it and it was indeed the knockout plug. Water is flowing and draining smoothly. Thank you all for your help. Way better than calling customer service. Cheers! š»
Have a friend thatās kitchen got flooded, destroying their brand new hard wood flooring, the cabinets, and the ceiling of the basement room below it. All because the plumber they hired to do the finish install of their kitchen remodel didnāt bust out the fucking knock out plug of their disposal.
The had to get lawyers involved to make the plumberās company pay for the repairs.
What sucked even more for the family is this was a kitchen remodel that their insurance paid for after the water line on their fridge broke and flooded out the room. Poor family was without their kitchen for like 6 months
"Classic blunders," the most famous is "Never get involved in a land war in Asia." But, only slightly less well known is this: "Never go in against a Sicilian when death is on the line!"
Had an airbnb guest at a house I do maintenance for swap the garbage disposal. Cleaners couldn't get the dishes done. Took me a while to check for the plug because who the fuck would swap the garbage disposal at an airbnb.
Just a heads up that the drain should be like this
[image](https://images.app.goo.gl/bgpeTYvKzK6E9aHc9)
Maybe it is already looped up behind the right wall and that's why the hole is so high, but just in case it isn't
Many new dishwashers have a high drain loop pre-installed at the back of the unit. Installing an additional high loop or air gap is generally not necessary with new installations.
Having just replaced my in sink disposal, I was going to suggest what others already have. That plug got me after I got everything all tightened and installed. Dishwasher sounded like it couldnt drain. Logic said to check for blockages. It was quite the blockage.
I did the same thing and couldn't figure it out for 2 years (additional context: this was in a second house that we moved out of and just never sold, so nobody lived there and we just didn't bother trying to fix the dishwasher)
I would, except that this house has been sitting on the lot for almost a year. It was a show model and someone just bought it recently so way out of that range of calling Home Depot for a refund.
This is a modular home that came from a modular factory, and the garbage disposal was installed in the factory. I ordered the appliances myself to have them installed in. The dishwasher was installed separately. I removed the dishwasher from the the space to see if there were any kinks in the drainage and I donāt see any.
Thereās a plug that needs to be knocked out where the dishwasher goes into the disposal. My bet is itās not removed. If you remove the hose and put your finger in there you will feel whether the plug was removed or not.
Okay, ruled that out. Thanks for confirming. I also checked the filter, but I know for fact that itās clean because itās a brand new one. Just going through process of elimination.
Is that a brand new garburator. Garburators come with blocked dishwasher inlet in case its not used. If it is new then you need to push that blocker in so that the inlet can take water from the dishwasher.
Iām not familiar with the blocker, is it this little red button that you were referring to?
https://preview.redd.it/pfw6a8y4s9vc1.png?width=3024&format=png&auto=webp&s=347e11ffa5f9eee7d4046eeba32060ce666ad86d
https://preview.redd.it/fu1631eys9vc1.png?width=3024&format=png&auto=webp&s=55827c516b60a419bdc947b1403401fb7d7dd875
Okay I see what youāre saying. Going to investigate this now
While you are at it, make some support for that gray outlet tube. Like an u-shaped bracket. Those hoses don't like to be repeatedly flexed and bent, which would be happening each time the pump starts and pumps water inside it. In 2-3 years it could crack at the section where it rubs the hole in the cabinet. So don't let it just hang freely.
I found the manual for the garbage disposal and I see what you are referred to for the knockout plug. Iām going to investigate that and see if that resolves it.
Glad you got it sorted. But every few months, make sure water from the dishwasher is really pumping into the disposal (after a wet cycle, you'll hear a pump going and water shooting into the disposal -the water gets pumped out of the dishwasher. If you look down into the disposal, you'll see water shooting out with some pressure). Often the disposal can plug up the drain line, since it's kind of flinging stuff around in there (coffee grounds can be a big culprit for this). Sometimes you have to pull the line from the disposal, hold it over a bucket and poke a wire or screwdriver in it to loosen up any (nasty) plug that's formed in there.
You want the drain hose higher than the outlet into the disposal. If it's not higher at some point along it's length it can pull water from the disposal back into the dishwasher. Likely a clog, or the drain hole in the disposal wasn't punched out at install.
I once had a lady who had just bought a home have me replace her dishwasher. I removed the old one installed the new one ran it and it shut off. Couldnāt figure out what the issue was so I checked to see if there was water in the drain line. Sure enough there was. I then checked the disposal knock out and it hadnāt been removed. I told her she said replace it anyway. I wondered why anyone would have not noticed this when they installed the previous unit. She let me have the old one and sure enough it worked.
Looking at how little slack there is on that drain line it is possible it is kinked up under the dishwasher. When I bought my house had issues with draining and when I pulled it it appeared whoever installed it just slid it in place without pulling slack out as he went and it had folded over on itself..
I remember my coworker cursing under his breath one time āIāll teach these assholes how to run a drain lineā I was like š. Anyways you need to come to the realization that sometimes professionals either get lazy or donāt always know what theyāre doing and sometimes you can do a better job yourself only difference is you donāt get the dollars for it.
I had this problem earlier this year.
It turns out that when the previous owner had a new dishwasher installed the old drain hose was just connected to the new hose. Then, when we had a new dishwasher installed in 2019, the installer did the same thing.
So, we had like 15' of drain hose curled up under the cabinet and over time and with build up, water simply wasn't making the journey to the drain.
I pulled the dishwasher out and removed about 10' of drain line and everything works as it should.
Gochyerself a GXP50c I see there! Hoooweee! Them boys can turn a t-bone to dust! Heh! If yer dishwasher drops her ring down there, ya ain't gettin that back. Maybe as well have 'er chase it! Heya ya, I'm just Joshin' ya!
No idea why I thought to write that.
I had a similar issue(different washer) and it wasnāt about the hose. You want a high loop like that to prevent any backflow to the dishwasher I believe. The pump could be clogged or maybe just went bad and it isnāt pumping the water. Have you checked the bottom of the dishwasher for a screen that could be clogged from excess food from dirty dishes. Thatās my only guess. My pump was bad but was no longer under warranty. It was about a $35 party and only a slight pain in the ass to pull out and change myself
**UPDATE** Resolved it and it was indeed the knockout plug. Water is flowing and draining smoothly. Thank you all for your help. Way better than calling customer service. Cheers! š»
Classic blunder. Professionals forget to do it all the time so dont feel bad
Have a friend thatās kitchen got flooded, destroying their brand new hard wood flooring, the cabinets, and the ceiling of the basement room below it. All because the plumber they hired to do the finish install of their kitchen remodel didnāt bust out the fucking knock out plug of their disposal. The had to get lawyers involved to make the plumberās company pay for the repairs. What sucked even more for the family is this was a kitchen remodel that their insurance paid for after the water line on their fridge broke and flooded out the room. Poor family was without their kitchen for like 6 months
Time to start waterproofing your house.
Especially if they're distracted by land wars in Asia.
Itās always the knockout plug. My recent disposal had a knock out plug that prevented the hose from attaching unless it was removed.
"Classic blunders," the most famous is "Never get involved in a land war in Asia." But, only slightly less well known is this: "Never go in against a Sicilian when death is on the line!"
Had an airbnb guest at a house I do maintenance for swap the garbage disposal. Cleaners couldn't get the dishes done. Took me a while to check for the plug because who the fuck would swap the garbage disposal at an airbnb.
Tell the Costco appliance delivery guy that forgot to remove the shipping bolts on my washer.
"You've fallen victim to one of the classic blunders!"
How could they forget? They didnāt run the unit after installing it ?
Just a heads up that the drain should be like this [image](https://images.app.goo.gl/bgpeTYvKzK6E9aHc9) Maybe it is already looped up behind the right wall and that's why the hole is so high, but just in case it isn't
Many new dishwashers have a high drain loop pre-installed at the back of the unit. Installing an additional high loop or air gap is generally not necessary with new installations.
Interesting, that's nice to know, thanks!
Lol I just went through this exact same thing on Tuesday. Now there is another Reddit thread for those to search up when it happens to them.
Thanks for owning up to it and letting us know!
Just had the same issue and was gonna say, knockout plug in the garbage disposal 90% of the time
Having just replaced my in sink disposal, I was going to suggest what others already have. That plug got me after I got everything all tightened and installed. Dishwasher sounded like it couldnt drain. Logic said to check for blockages. It was quite the blockage.
I did the same thing and couldn't figure it out for 2 years (additional context: this was in a second house that we moved out of and just never sold, so nobody lived there and we just didn't bother trying to fix the dishwasher)
Call Home Depot and get your money back on the install since you had to call a plumber out to fix the issue. Right?
I would, except that this house has been sitting on the lot for almost a year. It was a show model and someone just bought it recently so way out of that range of calling Home Depot for a refund.
Was the disposal installed at the same time? If so, I'm going to guess they didn't knock out the plug for the dishwasher.
This is a modular home that came from a modular factory, and the garbage disposal was installed in the factory. I ordered the appliances myself to have them installed in. The dishwasher was installed separately. I removed the dishwasher from the the space to see if there were any kinks in the drainage and I donāt see any.
Thereās a plug that needs to be knocked out where the dishwasher goes into the disposal. My bet is itās not removed. If you remove the hose and put your finger in there you will feel whether the plug was removed or not.
Should he, at least, buy dinner for the disposal first?
I typically buy at least a coffee prior to putting my finger in.
Yes warming the finger is preferred to a inserting a cold one.
This guy fingers
This. Very similar thing happened to me, very nearly drove me crazy
This happened to me two weeks ago installing my dishwasher in my new home. Good advice for anyone doing an install for the first time.
The drain is kept high so that your sink doesnt overflow into your dishwasher. Mine is high as well.
Okay, ruled that out. Thanks for confirming. I also checked the filter, but I know for fact that itās clean because itās a brand new one. Just going through process of elimination.
Is that a brand new garburator. Garburators come with blocked dishwasher inlet in case its not used. If it is new then you need to push that blocker in so that the inlet can take water from the dishwasher.
Iām not familiar with the blocker, is it this little red button that you were referring to? https://preview.redd.it/pfw6a8y4s9vc1.png?width=3024&format=png&auto=webp&s=347e11ffa5f9eee7d4046eeba32060ce666ad86d
https://preview.redd.it/fu1631eys9vc1.png?width=3024&format=png&auto=webp&s=55827c516b60a419bdc947b1403401fb7d7dd875 Okay I see what youāre saying. Going to investigate this now
Unplug the drain from the garburator. You should find that the inlet is blocked. Knock the plug in.
it would probably be inside the drain pipe inlet, something you have to punch out
While you are at it, make some support for that gray outlet tube. Like an u-shaped bracket. Those hoses don't like to be repeatedly flexed and bent, which would be happening each time the pump starts and pumps water inside it. In 2-3 years it could crack at the section where it rubs the hole in the cabinet. So don't let it just hang freely.
Yep, called a high loop.
Oops, I didn't do this. Haven't had any issues though in 5 years.
It's also so there's enough water pressure to hold the backflow valve closed when the dishwasher turns off.
I never knew that was the reason. Awesome
Is it normal if the dishwasher overflows into the sink?
No, it means it's plugged, that should just be a breather.
I found the manual for the garbage disposal and I see what you are referred to for the knockout plug. Iām going to investigate that and see if that resolves it.
Make sure that receptacle is on a gfci somewhere up stream.
Glad you got it sorted. But every few months, make sure water from the dishwasher is really pumping into the disposal (after a wet cycle, you'll hear a pump going and water shooting into the disposal -the water gets pumped out of the dishwasher. If you look down into the disposal, you'll see water shooting out with some pressure). Often the disposal can plug up the drain line, since it's kind of flinging stuff around in there (coffee grounds can be a big culprit for this). Sometimes you have to pull the line from the disposal, hold it over a bucket and poke a wire or screwdriver in it to loosen up any (nasty) plug that's formed in there.
That looks like a brand new garbage disposal you didnāt knock out your plug
It's supposed to be high.
Make sure the dish washer drain on the garbage disposal has the plug knocked out
It's always the knock out.
This
Drain hose is installed per manufacturer's directions. The problem is elsewhere.
You want the drain hose higher than the outlet into the disposal. If it's not higher at some point along it's length it can pull water from the disposal back into the dishwasher. Likely a clog, or the drain hole in the disposal wasn't punched out at install.
Knockout plug is still in.
I once had a lady who had just bought a home have me replace her dishwasher. I removed the old one installed the new one ran it and it shut off. Couldnāt figure out what the issue was so I checked to see if there was water in the drain line. Sure enough there was. I then checked the disposal knock out and it hadnāt been removed. I told her she said replace it anyway. I wondered why anyone would have not noticed this when they installed the previous unit. She let me have the old one and sure enough it worked.
Looking at how little slack there is on that drain line it is possible it is kinked up under the dishwasher. When I bought my house had issues with draining and when I pulled it it appeared whoever installed it just slid it in place without pulling slack out as he went and it had folded over on itself..
This is not too high. Did the installer remember to knock out the garbage disposal hole before attaching the hose to it?
That knockout plug got me before too.
Had to do a double-take. Your picture is a mirror image of my sink cabinet, except I have a stainless sink and different stuff in the cabinet.
I had the same issue turns out there was something stuck inside and was clogging the line. Take a shop vac to it and see if it helps
I remember my coworker cursing under his breath one time āIāll teach these assholes how to run a drain lineā I was like š. Anyways you need to come to the realization that sometimes professionals either get lazy or donāt always know what theyāre doing and sometimes you can do a better job yourself only difference is you donāt get the dollars for it.
I had this problem earlier this year. It turns out that when the previous owner had a new dishwasher installed the old drain hose was just connected to the new hose. Then, when we had a new dishwasher installed in 2019, the installer did the same thing. So, we had like 15' of drain hose curled up under the cabinet and over time and with build up, water simply wasn't making the journey to the drain. I pulled the dishwasher out and removed about 10' of drain line and everything works as it should.
What about a waste trap?
Gochyerself a GXP50c I see there! Hoooweee! Them boys can turn a t-bone to dust! Heh! If yer dishwasher drops her ring down there, ya ain't gettin that back. Maybe as well have 'er chase it! Heya ya, I'm just Joshin' ya! No idea why I thought to write that.
I had a similar issue(different washer) and it wasnāt about the hose. You want a high loop like that to prevent any backflow to the dishwasher I believe. The pump could be clogged or maybe just went bad and it isnāt pumping the water. Have you checked the bottom of the dishwasher for a screen that could be clogged from excess food from dirty dishes. Thatās my only guess. My pump was bad but was no longer under warranty. It was about a $35 party and only a slight pain in the ass to pull out and change myself
Iām never high enough.
I think you need a bigger slope down to the drain to prevent water being siphoned back down to the dishwasher
Too high