Troubleshooting Gurgling Radiator on 4th Floor Apartment: Valve & Vent Tips

Hello.
I've been having problems with my radiators for a while now. I live on the 4th floor of a block of flats. The gurgling radiator is in the bathroom (separate riser for the radiator in the bathroom). There is also a valve for closing and opening the flow in the upper right corner (unscrewed to the max). There is a vent on the top left.
I'll post pictures of the whole setup on Wednesday.
Thank you.
Goodbye.

Norbert Chrobot11 wrote:

There is a vent on the top left.

Bleed the radiator and it will stop gurgling, unless the air is outside the radiator and the radiator acts as a loudspeaker - you can hear a sound from it that travels through the pipes.

It is a sound similar to water pouring in steel pipes. Just venting the air vent does nothing. How about draining all the water from the radiator with it turned off???

If air has actually accumulated somewhere in the pipes, such a treatment in the form of a rapid flow to an empty radiator can help. If you are sure of the tightness of the valves and the quick possibility of closing, you can even unscrew the vent and then unscrew one of the valves for a moment and then the other because you do not know which pipe is air.

Thank you for the hints. I'll try to check it out Wednesday night and let you know.

Norbert Chrobot11 wrote:

It is a sound similar to water pouring in steel pipes. Just venting the air vent does nothing.

If this is the top floor, the cause may be low water in the central heating system. Such a problem usually occurs when a period of low external temperatures is followed by total warming. A phenomenon known from physics: the volume of water depends on its temperature. Leaks in the heating system in the building can also cause this problem. Report to the administration, which should top up the water in the heat exchanger. Just don't be fooled that they're fine.

homo_sapiens wrote:

If this is the top floor, the cause may be low water in the central heating system. Such a problem usually occurs when a period of low outside temperatures is followed by total warming.

But I would put it differently. This is a problem when there is a period of low temperatures and suddenly everyone opens the radiators (and they had them turned off when filling the installation), then there is no water in the system or the pressure is too low. The rest to administration.

Hello.
Yesterday I started draining the water from the radiator. I turned off the valve (brown color - attachment 1) and unscrewed the valve (black color - attachment 1). The water flew and flew. I didn't let it go all the way. I suspect that I may not have turned off all the valves yet. For example, the valve (orange and yellow were open all the time - attachment 1).
As for attachment number 2, it is a pipe whose elbows are just entering the radiator and there is also a half-and-half valve there in the middle (black color - attachment 2).
Thank you.
Goodbye.

And what are these two pipes in parallel with the radiator vertically?
Did it ever serve as a heater?
What does the return from this new radiator look like because it is not visible in the picture?
Are these tubes plugged somehow, or are they still heating, because maybe most of the water flows through them?

The 2 tubes that are parallel to each other are either outflow or inflow tubes (hard to tell). They are definitely warm.
The tube marked in turquoise (attachment 2) - it goes to the kitchen (also to the radiator). The pipe underneath is the pipe from the gas to the stove. In the past, there was no radiator in this bathroom, only pipes, and from what I remember they were warm in winter.
The entrance to the new radiator is marked in brown (Appendix 1), and the exit (I think) - in orange (Appendix 1). From the "outlet" of the radiator, the pipe goes to the valve marked in black (Annex 3).
In fact, all the pipes around the radiator are warm.

I will add that on Friday I will try to drain the water again.

Something is slowly clearing up. Write more or give a photo of the place where the return of this radiator is connected. There are probably cloths hanging there and you can't see them. And where are the lower ends of these 2 vertical tubes connected?

Added after 3 [minutes]:

Norbert Chrobot11 wrote:

In fact, all the pipes around the radiator are warm.

I suspect that's the culprit here ?
The water flows through these vertical tubes because it is easier for her than to tangle around the radiator.

If it was connected "crosswise", i.e. power supply in the upper right corner and return in the lower left corner, it would certainly work better. Probably the heating medium goes (straight) from top to bottom, bypassing the horizontal tubes in the radiator. Theoretically, with a one-sided connection (supply and return on one side - supply up, return - down), the radiator should heat, but slightly less than with a cross connection. Is mating checked? Is this 4th floor the last floor in the building or not? It may be that the radiator is too tight and the water does not want to flow over it. On the top floor, you can successfully set the initial setting (crimping) for a large passage.

The exit from the radiator in the lower right corner is a tube that only goes through the wall and is connected to a vertical tube (attachment 3) to an open valve.
The ends of these two vertical tubes, parallel to each other, go into the floor (I still don't know where they go).
Yes. The 4th floor is the last floor of the block.
What does crossing and crossing mean?

And is there a valve at the bottom of these vertical tubes to shut them off or restrict the flow?

Norbert Chrobot11 wrote:

The exit from the radiator in the lower right corner is a tube that only goes through the wall and is connected to a vertical tube (attachment 3) to an open valve.
The ends of these two vertical tubes, parallel to each other, go into the floor (I still don't know where they go).
Yes. The 4th floor is the last floor of the block.
What does crossing and crossing mean?

It's not about crossing, but about connecting "cross" (i.e. cross), i.e. diagonally (supply in the upper corner of the radiator and return to the lower - on the opposite side). Orifice is something else, namely to delimit the flow through the radiator (to balance the installation). In the past orifices, which were a brass disc with a hole of a certain diameter, were inserted into the unions in the past (hence the name orifices), and now no orifices are inserted, but the flow capacity on the valve is adjusted accordingly (after removing the thermostatic head, it is possible to make an initial setting in most valves).

My friend
this radiator will not heat until you insert a valve to cut off the flow through these tubes from which the radiator is connected. In this situation, the heat bypasses the radiator because it is easier than pushing into the radiator. the valve should be below the welded central vent on the pipe closer to the corner of the wall. best regards.

How would you show more precisely in the pictures how you have welded ends from the radiator to these thick pipes. And for the future, do not specify the points with a color, for example a number, because the color is not always displayed correctly.

For these tubes there is only this open valve (attachment - valve underlined in black).
The pipe in the lower right corner of the radiator is a pipe that goes only through the wall and is welded into a vertical pipe with a half-open valve. However, the upper pipe with the main valve is welded below the open, underlined valve with one end into a thick pipe, and with the other it goes through the wall and with an elbow enters a vertical pipe with one open valve.

Buddy, if you could show how the return of this radiator is welded, it would be great. best regards.

Sorry, but I don't get it anymore.

Added after 3 [minutes]:

Take a piece of paper and try to draw a diagram. Only the pipes and valves and this radiator are important. And describe it on the diagram, because I can't work it out from the pictures.

Norbert Chrobot11 wrote:

underlined valve

And don't color only numbers (as I asked). You can take pictures of the valves (supply valve and return valve) on the radiator only so that you can also see the place of welding with vertical pipes (slight close-up and not so far away).

Is it something like this?

Do you already know something?

Buddy, it's a bit hard to understand, but in my opinion, with such a connection, it will not heat well, and the gurgling will be until the air is expelled from this radiator. You showed a valve down there that is supposedly partially unscrewed, but is it above this return connection or maybe on the return? best regards.

This valve is attached to the return from the radiator.

Buddy, if this valve is on the return, it should be open to the max, but to bleed this radiator, turn off the supply valve, the one at the top of the radiator, and the one at the bottom should be open, then vent with the vent at the top of the radiator until water flows no air. best regards.

What does "There will be no water without air" mean?
The way I understand it is that the air is supposed to flow with the water in the end. But I can be wrong.

Norbert Chrobot11 wrote:

Is it something like this?


20191213_113304-1.jpg
Download (1.8MB)

Now describe what this red tube is. To what and how it is connected because it is not clear from the drawing what goes where.

For complete happiness, there is still no information about what is happening with these tubes at the bottom, are they all connected together as if to one tube that can be a return? Because for now it looks like it has no right to work properly, the water flows only through these vertical pipes because it is lighter, and only a substitute goes to the radiator.
And who installed this radiator and why doesn't want to take responsibility for its correct work ??