The sewage outlet is 320 away from the wall, can I install a 400 toilet

Sewage outlet 320, where do you see the measurement? It is to be measured from the center of the sewage pipe.

If you start from the pipe wall, then in fact, the pit spacing has to add half of the pipe diameter, which is about 380, so your 400 pit spacing will not fit.

If it's a central amount, then your pit spacing can't be fitted.

It is recommended to replace the pit spacing is 300, because the pit spacing is 320, it is necessary to take into account that the wall is tiled and occupies a distance of about 20, so it is appropriate to choose a toilet pit spacing of 300.

If you have to install a 400 toilet, then you have to raise the floor, add a section of pipe, and change it to a pit distance of 400. But it's not cost-effective.

Because the lifting platform needs to be at least 200 or more, then the amount of work is very large, it is better to replace the toilet.

If the hole position is wrong, it can be solved by elbow, etc. However, the problem is that we all know that the more corners you turn, the easier it is to block, and after it is blocked, it is not easy to dredge, which is the so-called endless trouble.

It is recommended that you do not install it, if it is more than 350, it can barely be installed, and if 320 is installed with 400, there will be many problems.