The high score asks whether the caisson in the bathroom has no secondary drainage and does not meet the delivery standard.

If it does not meet the requirements, you can complain to the Housing Authority.

Secondary drainage is a drainage method to prevent the water pipe buried in the bathroom from leaking and the floor from seeping to the downstairs of the owner's house. Because the bathroom will leak into the caisson after long-term use, and then accumulate in the caisson, cement will leak to the downstairs more or less after long-term soaking, and secondary drainage just solves this problem.

When decorating, it is best to seal the water pipes laid indoors with asphalt, so that even if the interface position is not completely sealed during construction or used for a long time, it will not leak.

Practical application case:

When the prospective owner of a real estate repossessed the building, he found that the toilet sewage pipe reserved the position of secondary drainage, but there was no secondary drainage, and the kitchen did not reserve the underground drainage pipe, which would cause water leakage downstairs for a long time.

How to set the secondary drainage?

It is best for prospective owners to soak the bathroom in water for 2 to 3 days when they take over the building to see if there is any water leakage. If there is water leakage, they can find a property management company to coordinate and deal with it, and then check and accept it after maintenance. Caisson should be waterproof first, and then drained for the second time to ensure that it is not afraid of water leakage. Secondary drainage is actually adding a floor drain in the open caisson. If the water pipes in the caisson are not well connected, the water can be discharged through the floor drain to prevent the sewage from accumulating in the caisson and infiltrating into the downstairs residents.