Title: Gurgling Siphon Under Sink: Dishwasher Issues, Aerator Installation & Possible Solutions

Hello,

I have been living in a new apartment recently and unfortunately I have a problem with the sink. At certain moments of the dishwasher's operation (water is being taken, as I guess) you can hear a loud "gurgling" from the siphon.

In the first photo you can see the connection as it was done by the installer. I started to figure it out and mounted the aerator as in the second photo through the positive tee, extensions and the aerator itself. Unfortunately it didn't help and the gurgling from the dishwasher is still as it was.

I am a layman, hence my question is whether I am doing something wrong, or maybe the aerator is installed incorrectly. I screwed the lid on the aerator all the way, there is a rubber "plug" inside, but I checked with a flashlight and it looks as if the plug does not rise from the moment of bubbling, and I guess the point is that the vacuum from the pipes lifts the plug and then air gets into the installation? If this is the case, why is the aerator not working properly?

I will be very grateful for your help and hints.

The valve also works the other way around. It prevents the creation of a vacuum and sucking of water from the siphon, leaving it empty and then an unpleasant odor comes out. So when you drain the water somewhere, and a negative pressure is created in the installation, its task is then to open, allowing air to be sucked in, not water from the siphon. I have a washing machine connected so and you can also hear gurgling as it drains the water. This noise is probably not a gurgling sound, it just seems like it, because there is a diaphragm pump in the washing machine or dishwasher, it may sound like that. If it was only when the dishwasher is working, I would not worry about it. In my case, even the foam can be seen after washing in the sink. Such a charm. You can connect the dishwasher to the sink siphon by making a siphon on the dishwasher's duct so that it does not stink and it should be fine.

The gurgling comes from clogged pipes. The water does not run down the wall, but along the entire cross-section of the pipe, sucking in the air behind it, which is drawn in through the siphon. Kind of like draining the wine with a snake. The only advice - a spiral.

bumble wrote:

Such a charm. You can connect the dishwasher to the sink siphon by making a siphon on the dishwasher's duct so that it does not stink and it should be fine.

Theoretically, you can live with it, because only annoying noises, no unpleasant smells. I will try to connect the dishwasher behind the sink siphon.

balonika3 wrote:

The gurgling comes from clogged pipes. The water does not run down the wall, but along the entire cross-section of the pipe, sucking in the air behind it, which is drawn in through the siphon. Kind of like draining the wine with a snake. The only advice - a spiral.

But I guess this gurgling would always be there, also when draining the water from the sink, and it is only in the dishwasher. Additionally, it's a new construction, so it's probably too early for spirals.

qerten wrote:

But I guess it would always be gurgling, also when draining the water from the sink

It's a fact. So not this after all

The siphon drain should work. The siphon should dampen it.

Moving the drain behind the siphon will stink the sewage system in the dishwasher. A hose kink is not a siphon.
This gurgling is caused only by the high speed flow.
It's just that not everything can flow through the siphon.
Cleaning the siphon may help a little.
After that, the stream from the dishwasher falls directly into the water level in the siphon. This will also make noise.
Side approach could be better.

Why don't you turn this tee towards the siphon and the siphons towards the tee? You would have a much shorter length of white pipe and straight.

piracik wrote:

Moving the drain behind the siphon will stink the sewage system in the dishwasher.

Nonsense. Read exactly what I wrote.

bumble wrote:

by making a siphon on the dishwasher line so that it does not stink

piracik wrote:

Side approach could be better.

He's to my side and hears the gurgling too. But every case is different. Anyway, those on the side are at an angle for sure.

piracik wrote:

Why don't you turn this tee towards the siphon and the siphons towards the tee? You would have a much shorter length of white pipe and straight.

Perhaps there is not enough space to put two stiff pieces together.

bumble wrote:

Nonsense. Read exactly what I wrote.

You see. And you read what I wrote?
Bending the hose is not a siphon. The speed of the flow is so great that it will spit water out of such a bend and it will stink.
Unless you wanted to add an additional siphon, but your text did not indicate anything like that.

I didn't mean to bend the snake, but that should also work. It would definitely pass the slow-flow test, and I don't know. You can try as mentioned. For starters, I would just postpone and check the gurgling. And is there no non-return valve in the dishwasher for the pump? Such an eraser?

And how to use 50 diameter pipes on this new section by adding a tee - something like that?

That would be OK, although a regular siphon would have been better.

bumble wrote:

And is there no non-return valve in the dishwasher for the pump? Such an eraser?

It doesn't matter if it is there or not. For dishwashers and similar products that come into contact with food, a drainage break is recommended. The siphon provides this.

If anything were to come back, it would overflow into the sink. Will not build up pressure on the dishwasher drain.

Thanks to everyone for the answers, the problem was solved.

In fact, the problem was that there was plenty of water in the dishwasher drain. I disassembled the siphon and thought that my installer gave the bodies, making only small holes in the siphon where the dishwasher drain / overflow was attached - as in the picture. I cut off the top layers of these tubes and put them back in place, but it had no effect on the gurgling.



So it turns out that the manufacturer of the siphon (the sink is from Berg and the siphon came complete) made the wrong connection. First, the water flows from the top (as indicated by the pirate). Secondly, the protruding pipe in the siphon for connecting the dishwasher pipe should be wider than the dishwasher pipe, so that the dishwasher pipe is inserted inside and the flow diameter does not decrease. Here, as you can see in my previous photos, the end of the dishwasher pipe is put on the place to be connected in the siphon, and not inserted inside (as the dishwasher pipe has a diameter of 25 mm in the middle, after connecting the water flows through the narrow throat surely +/- 20 mm).

So I added an extra tee and a siphon. I went to the left, because on the right there is a hose and a weight from a pull-out battery (if the weight rests on the siphon, the battery would not want to hide). There was really little space there, so I had to shorten the horizontal pipe between the tee and the siphon as much as possible and instead of the normal 50/25 reduction elbow I used a 50/25 rubber reduction, so in the end I stiffened it all with tape. Describes exactly, maybe it will be useful to someone in the future. ;)



Everything is fine, nothing gurgling or dripping.

Thanks and regards

So the drain went behind the sink siphon as I wrote and it is fine now. Cool.

You did something similar to what I suggested, only you used the usual siphon and not my suggestion.