You can rent professional-grade medium or large drain cleaners from retailers like Home Depot for approximately $100. Chemical Cleaners:
Flushing the toilet causes water to gurgle up in the bathtub, or running the washing machine overflows a floor drain. how to unclog main sewer line
Have a plumber perform a camera inspection every 2–3 years to catch root intrusion or pipe shifts before they become emergencies. You can rent professional-grade medium or large drain