1. View design drawings: Design drawings are one of the important documents of construction projects, including detailed information of building structure and equipment layout. Check the drawings to know the specific location of the drain pipe.
2. Consulting the property management company: The property management company is responsible for the daily maintenance and management of the community. They usually know more about building structures and equipment. You can consult the property management company to get more accurate information.
3. find a drain: find a drain in the house or on the outer wall. In general, the drain pipe is connected with the drain pipe. Find the drain, and maybe you can find the location of the drain.