krzysztofh wrote: If it's true what you write it will be a problem anyway, maybe not with the washing machine but with the sink. How do you want to connect a siphon at such a height?
Probably you have not been in a shop with PVC fittings for a long time, I had a problem, the cabinet hanging in the bathroom (I did not choose and assemble, "daughter's" wine and the glaze was already placed), back clearance 7cm (cabinet difficult to modify) but the entrance to the sewer protruded a centimeter from the wall, I mixed up and without problems I connected the siphon, it also fitted behind the cabinet, I did not change anything, I made everything like lego blocks. There is everything in shops for today, unfortunately I was building in the early 80's. PS. The vertical siphon tube (between the siphon and the washbasin) is longer and you can mount up to 15cm from the floor, cost about PLN 4.5 if the PVC siphon, if metal about PLN 25-60 depending on how low you want to leave the siphon, here you can not extend only to buy a long metal pipe.