The smoke should not enter your home or building unless you have defective plumbing or seldom used drains.
It is possible that smoke can enter through a drain trap which has dried out or some other plumbing defect, such as inadequate, defective or improperly installed vents or pipes; or connections or seals in the wastewater drain system in and/or under your home or building are damaged, defective, have plugs missing or are improperly installed.
If you have any seldom used drains, it is recommended that you pour water in the drains to fill the trap and you should do this on a monthly basis. This will help prevent sewer gases or smoke from entering your home or building.
NOTE: IF SMOKE CAN ENTER YOUR HOME OR BUSINESS, THEN DANGEROUS SEWER GASES CAN ALSO ENTER THE STRUCTURE.
If smoke can enter through faulty plumbing, the potential exists for sanitary sewer gases to enter your home or business. If this occurs, you should consult a licensed plumber to make repairs to your private property plumbing.
Sanitary Sewer Smoke Testing