If you are concerned about backflow, it important that your sewer line has:
A backflow prevention valve and clean-out access in the basement of the home;
An unobstructed vent stack (check regularly for blockages like bird's nests);
A functioning basement sump pump - they're not just for rainwater.
Above: video by Utilities Kingston (Ontario) on "FOG".
On occasion, we experience an increased amount of foreign substances and objects in our sewer system, causing back-up in sewer mains, residences and at our sewage plant. This can cost the Town thousands of dollars in contractor services, maintenance work and equipment failures.
Undissolved so-called “Flushable Wipes” (while they flush they do not dissolve) and any kind of cloth are a major contributor to back-ups.
