Bathroom renovation: strange drainage pipes

Hello,
I might want to renovate my bathroom built in 1985. On the wall to the right of the toilet, there is a recess hiding a drainage pipe, probably from the washing machine drain. The wastewater from the washing machine is routed through it to the shower drain, see pictures. I would like to get rid of the recess and pipe during the renovation, if possible.


I wonder why the washing machine wastewater is not simply connected to the toilet drain. Is that not possible?
Also, there is a strange water pipe coming out of the wall at the bathtub:

Could this be an overflow? As far as I know, water has never come out of it. I would like to get rid of this unsightly pipe. Is there any way to do that?
Thank you very much, Philipp

Hello

The wastewater pipe of the tub probably runs in the mentioned socket towards the toilet.
The outlet in the tub area is probably the leakage water pipe of the pipe ventilators.

Olli

Hello Olli, thanks for the reply!

The wastewater pipe of the bathtub probably runs in the mentioned pedestal towards the toilet.

Yes, that's correct. I just checked. Is the pipe routed in the pedestal because the heating pipes are in the way? So I have no chance to relocate it into the wall?

The outlet in the bathtub area is probably the leakage water pipe of the pipe ventilators.

Thanks for the info. Is it possible to make such an outlet look nicer afterwards, or do you leave it as it is during a renovation?

Hi Phillip

The base seems to me almost higher than the tub floor, there might still be potential to lay the channel a bit deeper. Have a look behind the inspection opening of the tub.

This can be made a bit nicer with a new outlet. Possibly also extend it to the [UP Spülkasten].

Many change options also depend on the scope of the renovation.

Olli

Hello again,

Possibly also extend up to the UP flush tank.

Is the outlet from the pipe ventilator usually led into the UP flush tank today? Or do modern installations no longer have a pipe ventilator?
Could it also be extended into the overflow of the bathtub?

Thank you