Whether there is a mandatory air partition at the front of the toilet toilet

It is not mandatory.

Different manufacturers, different models, different sizes. >>>More

Yes, according to the regulations of the Construction Committee, it is necessary to do waterproofing, because this has potential safety hazards. The kitchen, balcony, etc. can be chosen, can be done, there are no hard and fast rules.

The code only requires that the toilet must have ventilation facilities, which can be natural ventilation facilities with openable external windows and mechanical ventilation facilities. Generally, when there is an openable exterior window in the bathroom, there is no exhaust fan, and there is no openable exterior window. Of course, in the design of some public toilets with a large flow of people, even if there are external windows, it is best to set up exhaust fans to force exhaust. >>>More

There is a 5-year warranty for waterproofing and 2 years for water pipes! After the warranty period, you are responsible for yourself, that is to say, it is not a human factor, and the upstairs is responsible for repairing the water leakage! First of all, ask the housing quality inspection department to make an appraisal report on the cause of water leakage in the house and how to fill the leakage; After identification, if it is the cause of the adjacent party, the adjacent party may be required to repair it immediately or in a timely manner on the basis of the report, and may request compensation from the adjacent party for the damage caused during the repair period. >>>More

It is best not to make too many changes to the water supply and drainage lines in the bathroom, if you want to change, it should be determined according to the specific situation, such as the different models of washing machines, the position of the water supply and water will be different.