Hello.
In the wall at a height of 55 cm I have a PVC pipe with a diameter of ?32 mm. I would like to connect the drain from the washing machine to it.
Can I do it directly through a 32/25 reduction gasket? About such:

The seller in the fittings store advised against this solution and recommended a siphon because an additional metal clamp can be attached to the hose:

The seller claims that the hose may fall out of the reduction gasket. I find it hard to believe, but I'd rather not have to replace the hardwood floor if that should happen.
I would connect through a siphon, but this is a very tiny room and it is difficult to approach with the cable from the bottom - then the hose would have to be twisted as shown in the picture (version 2). The hose in this position does not fit "lightly" and I wonder if it would not turn the siphon over time

The siphon must be used only and exclusively as in version 2? Can't do as in version 3? Apparently, those siphons with a spring are very dirty and need to be cleaned - I would prefer to avoid it (access problem). The siphon without a spring in version 3 will not work - the ball will drop - can you just take it out? I would like to point out that I have no problems with the smell - now the tube is just sticking out of the wall and I did not clog it, and no smell comes out of it.
So I would like to connect via a 32/25 reduction - the cable fits perfectly for this approach, only this seller scared me that it might fall out, I bought such a reduction and it seems to sit very tightly on the outlet duct of the washing machine. Come on, be smart here. Do you have any experience with connecting directly via 32/25 reduction?
In the wall at a height of 55 cm I have a PVC pipe with a diameter of ?32 mm. I would like to connect the drain from the washing machine to it.
Can I do it directly through a 32/25 reduction gasket? About such:

The seller in the fittings store advised against this solution and recommended a siphon because an additional metal clamp can be attached to the hose:

The seller claims that the hose may fall out of the reduction gasket. I find it hard to believe, but I'd rather not have to replace the hardwood floor if that should happen.
I would connect through a siphon, but this is a very tiny room and it is difficult to approach with the cable from the bottom - then the hose would have to be twisted as shown in the picture (version 2). The hose in this position does not fit "lightly" and I wonder if it would not turn the siphon over time

The siphon must be used only and exclusively as in version 2? Can't do as in version 3? Apparently, those siphons with a spring are very dirty and need to be cleaned - I would prefer to avoid it (access problem). The siphon without a spring in version 3 will not work - the ball will drop - can you just take it out? I would like to point out that I have no problems with the smell - now the tube is just sticking out of the wall and I did not clog it, and no smell comes out of it.
So I would like to connect via a 32/25 reduction - the cable fits perfectly for this approach, only this seller scared me that it might fall out, I bought such a reduction and it seems to sit very tightly on the outlet duct of the washing machine. Come on, be smart here. Do you have any experience with connecting directly via 32/25 reduction?