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.