As a rule, a clogged sewer is very easy to recognize: it exudes an unpleasant odor and does not pass water in the required volume. Sometimes throughput is not affected, but the room still stinks. This is because the pipes accumulate fat and other remains of vital activity, they exude such a smell. In this case, it is better to clean the pipes https://pomplumbing.ca/snaking-and-powerwash-for-clogged-drains/ and forget about the stench forever.