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The slope of the ground to the floor drain is about 3%.
3% refers to the vertical rise (fall) of 3 meters per 100 meters of horizontal distance.
It will affect the discharge, and it is still very affecting.
1.If the material of the sewage pipe is PVC, it is best to buy an elbow like it and replace it. >>>More
No, it won't. Toilets are made with a P bend. Prevents water from backflowing.
Generally, the length of the waterproof casing is 25-30cm, minus the thickness of the floor slab, and it is generally exposed 13-18cm
My insight is that your building is a compartment drainage, that thing is the water trap of your upstairs residents, it is a sewage pipe, there is a water seal, to prevent the odor in the pipe and flying insects and the like from returning, and the cover is opened when the trap is blocked to let things leak.