You replace a failed or failing system and then you get the call: “I have bad sewer gas odors and did not have them before you replaced my system, so you must have done something wrong.”
It’s always better to warn customers before you replace their system. “Replacing a failed/failing system can result in increased sewer gas odors inside or outside your house if pre-existing venting issues exist."
The reason this happens is fairly simple. When a system is failing pipes are typically full of water. The more water in a pipe, the less air movement through the pipe. In a properly
