I bought a second-hand house, and the toilet sewer was blocked. I had it repaired and said there was too much rust. It's best to discuss it downstairs, but downstairs doesn't agree.

The drain pipe of the bathroom should be connected with the sewage pipe and finally discharged into the septic tank. You can also go directly to the second floor. Now there is no need for cast iron pipes, but white PVC pipes, as long as the property does not interfere. Whether you choose wall row or floor row, as long as you use the original sewage pipe of the building, you must first solve the blockage problem, otherwise it will be more troublesome to use it in the future.