Dishwasher drain straight down into basement sink?

[Ahoragi]

I am curious if there are any issues with this? We want to add a dishwasher but tearing out the new cabinets that the house came with is not feasible so the only option we have is to place it next to the counter, which is about 4-5 feet from the kitchen sink. Directly below the dishwasher downstairs is the basement sink that has the water filtration system and RO system draining into the tub. Will having the dishwasher drain go through the floor straight down into the sink be a bad idea?

We have thoughts of placing the dishwasher next to the original counter and adding a 36" butcher board as extended counter to prep and then a 12" cabinet to end it all.

 

[Whitenuckler]

I am curious if there are any issues with this? We want to add a dishwasher but tearing out the new cabinets that the house came with is not feasible so the only option we have is to place it next to the counter, which is about 4-5 feet from the kitchen sink. Directly below the dishwasher downstairs is the basement sink that has the water filtration system and RO system draining into the tub. Will having the dishwasher drain go through the floor straight down into the sink be a bad idea?

We have thoughts of placing the dishwasher next to the original counter and adding a 36" butcher board as extended counter to prep and then a 12" cabinet to end it all.

In this house they took the dishwasher drain from the unit with 5/8" ID hose, then got it into 1 1/2 DWV with a cap and hose connecter. Then that goes to a drain. Adding another drain to an existing drain is just a Y. There is no trap as I guess the hose goes to a pump inside the dishwasher. I have never smelled anything. It looks like a plumber did it to me during their kitchen reno.

 

[EbS-P]

In this house they took the dishwasher drain from the unit with 5/8" ID hose, then got it into 1 1/2 DWV with a cap and hose connecter. Then that goes to a drain. Adding another drain to an existing drain is just a Y. There is no trap as I guess the hose goes to a pump inside the dishwasher. I have never smelled anything. It looks like a plumber did it to me during their kitchen reno.

Most dish washer manuals (or dishwashers) say put a U bend in the hose to make a trap.

 

[EatenByLimestone]

I have a small countertop dishwasher. I have it draining straight into my kitchen sink. I suspect it will be fine to drain into a basement sink. You may want to put a strainer over the drain, I’d hate to have the drain clog due to grease and food particles from the washer. Given its location and other things draining into it, a clog may not be noticed quickly and problems may be compounded quickly. You may want to do the boiling water and dish soap treatment every once in a while. I’ve found grease coagulated on my dishwasher filters in the past.

 

[Gearhead660]

I am curious if there are any issues with this? We want to add a dishwasher but tearing out the new cabinets that the house came with is not feasible so the only option we have is to place it next to the counter, which is about 4-5 feet from the kitchen sink. Directly below the dishwasher downstairs is the basement sink that has the water filtration system and RO system draining into the tub. Will having the dishwasher drain go through the floor straight down into the sink be a bad idea?

We have thoughts of placing the dishwasher next to the original counter and adding a 36" butcher board as extended counter to prep and then a 12" cabinet to end it all.

So you have a built in dishwasher you want to use like a portable one? Just placing it next to the cabinets? Running the drain to the basement sink shouldnt be an issue. The reason for the "trap" in the discharge hose going to the sink drain in a traditional install is to prevent the drain water from the sink drain going into the dishwasher.

 

[johneh]

There are 3 reasons for the trap
1 stop water from the kitchen sink draining into the dishwasher
2 stop sewer gases from entering the dishwasher. That smell you do'nt need
3 If you drain to the basement sink, it will stop the dishwasher from just draining the water straight to the sink

 

[Whitenuckler]

I was looking at some pictures of dishwasher hook ups below sinks (and I have done this myself). There is the drain adapter that fits 1 1/2 pipe to hose. You put that above the sink trap. Then you are supposed to make a loop with the hose and go up to the bottom of the counter. That way the sink full of water may not flow into the dishwasher. I don't think I did that.....but that's been many many houses before this one.

 

[bogieb]

I have a small countertop dishwasher. I have it draining straight into my kitchen sink. I suspect it will be fine to drain into a basement sink. You may want to put a strainer over the drain, I’d hate to have the drain clog due to grease and food particles from the washer. Given its location and other things draining into it, a clog may not be noticed quickly and problems may be compounded quickly. You may want to do the boiling water and dish soap treatment every once in a while. I’ve found grease coagulated on my dishwasher filters in the past.

I have one of those counter top dishwashers also and like yours, it drains straight into my kitchen sink. My dishwasher is on a rolling cart as I have a small kitchen with precious little counter space (or any other room), so the dishwasher gets wheeled over in front of the sink when it is used (about every 1.5-2 days).

Since my main faucet also doubles as a spray head, I put a "bar" faucet where the separate spray head would go. That way I have a quick release hook up for the bar faucet.

 

[EatenByLimestone]

I don’t have room for a cart, it’d just be in the way of something else. Our kitchen is well laid out, just stupid small, lol.

 

[Whitenuckler]

I don’t have room for a cart, it’d just be in the way of something else. Our kitchen is well laid out, just stupid small, lol.

I don't think my kitchen had one when it was built. In a proper design the dishwasher is next to the sink, and the hot water and drain hook under the sink. On mine it is at the end of counter where there might have been cupboards. My kitchen is so old that some of the drawers that you would normally use all the time have no side slider brackets. It's just a plain wood box drawer sliding on wood. They did some "easy cheap" renovation but skipped new base cabinets. So that is why my dishwasher gets hooked up in the basement to an open ceiling area in the laundry room. It is big though.

 

[zrock]

I would rather drill some holes in the end cabinet and run your drain and water feed lines to your sink instead of drilling through my floor to drain into the basement.

 

[Whitenuckler]

I would rather drill some holes in the end cabinet and run your drain and water feed lines to your sink instead of drilling through my floor to drain into the basement.

I think in my case it was easier as below is all open, and there are two other lower units between the dishwasher and the sink. That is why they put them next to the sink lower. I like it because I can see all of the hookups.

 

[noithaaau]

When washing dishes, a lot of water will be discharged, so the dishwasher needs to be placed high up, and the drain pipe must be large enough to prevent blockage.

 

[Ahoragi]

Thanks for the responses. It's a full size dishwasher that goes in the cabinet space but we don't have any available spot. Removing the dual cabinet will require getting another small cabinet which are priced ridiculously from $250-$400 and barely fits anything useful except cookie pans. I found that the drain hose WILL reach through the dual cabinet into the sink cabinet and hook up to the sink's drain. I was also able to source a 8 ft water hose that reaches the hot water hook up under the sink as well. So my new plan of action is drill 1.5" hole through the cabinets to route the hoses to the sink hookups. The holes will have white pvc grommets to look somewhat nice. I have a bunch of wood and need to build something nice to cover the dishwasher and act as countertop.

The wife said let's move the fridge to other wall and put dishwasher there and she will attach a pull string light above it on the cabinet and add one of those wall-mounted skillet holders. We had one at the old house and it was such a conversation piece and saved so much cabinet space.

 

[Whitenuckler]

Thanks for the responses. It's a full size dishwasher that goes in the cabinet space but we don't have any available spot. Removing the dual cabinet will require getting another small cabinet which are priced ridiculously from $250-$400 and barely fits anything useful except cookie pans. I found that the drain hose WILL reach through the dual cabinet into the sink cabinet and hook up to the sink's drain. I was also able to source a 8 ft water hose that reaches the hot water hook up under the sink as well. So my new plan of action is drill 1.5" hole through the cabinets to route the hoses to the sink hookups. The holes will have white pvc grommets to look somewhat nice. I have a bunch of wood and need to build something nice to cover the dishwasher and act as countertop.

The wife said let's move the fridge to other wall and put dishwasher there and she will attach a pull string light above it on the cabinet and add one of those wall-mounted skillet holders. We had one at the old house and it was such a conversation piece and saved so much cabinet space.

See if you can get matching counter top. You could then take your existing edge off, and glue the extension on. Then add a side panel on the left.

 

[johneh]

Join conversation on Teams

teams.live.com

Whitenuckler Now you need a cabinet maker to do it right or at least a highly skilled woodworker

 

[Whitenuckler]

Join conversation on Teams

teams.live.com

Whitenuckler Now you need a cabinet maker to do it right or at least a highly skilled woodworker

We had a discount kitchen cabinet place in Oshawa. They did all custom work. Sometimes you can buy the pieces you need at big box stores too. The trick in the case is to get the matching top.

 

[blades]

I like having a skinny cabinet for cookie sheets and similar. other wise they always get buried under other implements. Course I just a guy what do I know about kitchens.

 

[Whitenuckler]

I like having a skinny cabinet for cookie sheets and similar. other wise they always get buried under other implements. Course I just a guy what do I know about kitchens.

I think I know what you mean. Like a door maybe 4 inches wide and up to the counter top, all open. I guess we could add that in between the last cabinet and the new one. Or would you like it to be an open slot, no door?

 

[venator260]

Is there a way to extend your plumbing system to the area under the dishwasher? I installed mine to go down through the floor and hook directly to 1 1/2 PVC via one of the adapters mentioned above. I then put a trap in before it enters a 2 inch line that catches my washing machine. I also just ran a separate supply line off of the hot water to the area behind the dishwasher. It was easer than going behind a corner cabinet

 

[gthomas785]

Is there a way to extend your plumbing system to the area under the dishwasher? I installed mine to go down through the floor and hook directly to 1 1/2 PVC via one of the adapters mentioned above. I then put a trap in before it enters a 2 inch line that catches my washing machine. I also just ran a separate supply line off of the hot water to the area behind the dishwasher. It was easer than going behind a corner cabinet

With that approach just remember every P trap must be vented somehow

 

[bogieb]

I don’t have room for a cart, it’d just be in the way of something else. Our kitchen is well laid out, just stupid small, lol.

My kitchen is 90" x 98" (wall to wall), with a door on either end as well as the entire chimney on one wall. The cart/dishwasher and refrigerator are not in the kitchen - LOL.

 

[Whitenuckler]

With that approach just remember every P trap must be vented somehow

The 2 inch for the washing machine would normally be open pipe, and then have it's own trap, with venting after that. I don't think the dishwasher needs it's own trap. It normally is just a hose that dumps into another drain that has a trap. The hose goes to a pump in the dishwasher, and the other end should be in "air" above a trap. The only thing is that if you connect it to a sink drain, you need to raise the hose as high as you can so when you empty the sink full of water, it does not back feed the dishwasher.

 

[gthomas785]

The 2 inch for the washing machine would normally be open pipe, and then have it's own trap, with venting after that. I don't think the dishwasher needs it's own trap. It normally is just a hose that dumps into another drain that has a trap. The hose goes to a pump in the dishwasher, and the other end should be in "air" above a trap. The only thing is that if you connect it to a sink drain, you need to raise the hose as high as you can so when you empty the sink full of water, it does not back feed the dishwasher.

Yes that's right. I thought I was responding to someone who suggested adding a new drain/trap for the dishwasher.

 

[zrock]

Thanks for the responses. It's a full size dishwasher that goes in the cabinet space but we don't have any available spot. Removing the dual cabinet will require getting another small cabinet which are priced ridiculously from $250-$400 and barely fits anything useful except cookie pans. I found that the drain hose WILL reach through the dual cabinet into the sink cabinet and hook up to the sink's drain. I was also able to source a 8 ft water hose that reaches the hot water hook up under the sink as well. So my new plan of action is drill 1.5" hole through the cabinets to route the hoses to the sink hookups. The holes will have white pvc grommets to look somewhat nice. I have a bunch of wood and need to build something nice to cover the dishwasher and act as countertop.

The wife said let's move the fridge to other wall and put dishwasher there and she will attach a pull string light above it on the cabinet and add one of those wall-mounted skillet holders. We had one at the old house and it was such a conversation piece and saved so much cabinet space.

Now if that was me i would have removed the cabinet by the sink and moved it over enough to fit in the dishwasher and then purchase a new upper and lower to finish off the space. That is one of the most common cabinet designs out their.. Then put the butcher block top on the new cabinets.. On a side note with the unit not being in a cabinet and screwed to the counter top how are you going to keep it from tipping over every time you open the door?