Can you change the sewer pipe on the second floor?

The independent reconstruction of the second floor water pipeline needs the approval of the management office of the residential property company. If the owner of the residential area wants to modify the sewer pipe independently, he must go to the property company to apply for the construction permit with his ID card and household registration book or residence permit, because the independent modification of the sewer pipe on the second floor of the private building requires the approval of the management office of the residential property company.