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Kangxiang Plastic Industry will answer for you.
Don't use the main pipe opening, are connected with pipe fittings, depending on what your design drawings are, generally connecting the main pipe and the branch pipe fittings have oblique tee, positive tee, reducer tee, etc.
Why is it recommended that caisson toilets must be drained twice?
In order to see whether the construction of sewer pipes is qualified. If qualified, it won't.
1. The waterproof layer on the sunken floor slab and the waterproof layer between the backfill layer and the surface layer (attached to the floor tiles) should be paid special attention to and should not be negligent. Cast-in-place concrete floor slabs tend to have some shrinkage cracks. These tiny cracks, which are imperceptible to the naked eye, are unabashedly revealed as a water test. >>>More
This is the sanitary drop plate.
It's very simple, just get that. >>>More
hat though, I didn't kee