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The ventilation H pipe fittings in the bathroom are generally between 250 and 350 meters from the top, except for the top floor.
The principle is to use a water seal to isolate the air on both sides, so that odors will not enter the room.
The net distance between the sewage riser and the wall should be 20mm and 50mm. The net distance between the rain, sewage pipes and air-conditioning condensate pipes laid outdoors along the wall should not be greater than 20mm. >>>More
No, they are all constructed according to the requirements of the drawings, generally about 300mm away from the roof.
Glowing is not exclusive to the sun, you can shine too.
There is no toilet with a 25 cm hole spacing, but you can buy a toilet drain shifter at a hardware store that sells pipes, and you can solve the problem of insufficient toilet hole spacing. I hope my answer can help you.