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If the water supply pipe is not buried, it can be walked on the wall, and the drainage pipe must be buried first and then backfilled.
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If you plan to go all the open pipes, you can bury them, that is, the ones outside the exposed walls.
It can be installed, it has been decorated, and it can only be installed with surface-mounted water pipes---
Plan out the direction, you buy pipes and elbows, cut them according to the number, and combine them well. If you live in a building, you use PVC glue to glue the pipe fittings firmly. What's so hard.
If you want to be on the countertop, you are about 1.3 meters, and if it is hidden underneath, it should be between 80 and 90.
Buried casing, there is a finished casing, the later stage directly takes over, no finished product is used to use a larger pipe into a section, can not bury the pipe, I am a professional hydropower. I don't know how to ask again.
Tap water is usually buried on the left side of the toilet bowl about 30 cm above the ground.