![]() Otherwise you'll have to remove the entire plumbing trap to clean it. If your drains are slow at only certain fixtures, one of the first things to check is for clogging of the individual fixture traps.Īs Carson Dunlop's sketch shows, some fixtures such as laundry sinks are required to have traps which include a cleanout plug, making cleaning of the trap easier. Clogged Plumbing Traps / InterceptorsĬlogged or blocked plumbing traps can cause leakage, and organic debris in plumbing traps may itself be a source of odors which people mistake for sewer gas backups. The page top sketch of the detailed parts of a plumbing trap was provided courtesy of Carson Dunlop Associates (found at page bottom, Click to Show or Hide), a Toronto home inspection, education, & report writing company. Other causes of sewage odors, septic odors, sewer gas, rotten egg, or other indoor gas odors are also described. This article series describes both plumbing drain traps and how properly installed traps or interceptors should prevent or cure sewer gas odors from septic systems, building plumbing, & similar sources.Ĭhecklists in this article series will help with sewer gas smell diagnosis or septic gas smell diagnosis. The chopped-off, open drain line combined with eventual dry-out of the water in the plumbing trap shown will provide a ready path for sewer gases to enter the structure - a sanitary hazard and even an explosion hazard. Our photo (left) shows a plumbing trap that was abandoned in a building basement. ![]() Watch out: Improperly installed, damaged, leaky, or missing plumbing drain traps can release smelly and even dangerous sewer gas odors in the building. Problems With Plumbing Fixtures or Fixture Traps (Interceptors) & Sewer Gas Leaks & OdorsĪ plumbing trap is a U-shaped bent building plumbing drain component whose job is to maintain a water seal to keep sewer gases from rising back up into the building from the building's sewer drain piping system. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article series distinguishes between P-traps and older S-traps and explains trap siphonage and the dangers that can result from dry plumbing traps. We describe the common problems that occur at plumbing traps: odors, leaks, noises, and we discuss plumbing trap types, requirements, locations, connections, installation, repair and replacement. This plumbing traps (interceptors) article describes plumbing traps (interceptors) and how to diagnose, find, and cure odors in buildings including septic or sewage or sewer gas smells or "gas odors" in buildings with a focus on homes with a private onsite septic tank but including tips for owners whose home is connected to a sewer system as well. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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