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  2. No, You Don't Need to Clean Your Air Ducts Every Year ... - AOL

    www.aol.com/no-dont-clean-air-ducts-110500245.html

    Diving into the world of air duct cleaning can turn risky if you don't do your due diligence when searching for a reputable company or technician. Some cleaning companies might try to talk you ...

  3. Sewer gas - Wikipedia

    en.wikipedia.org/wiki/Sewer_gas

    Originally, traps in drain pipes were designed to help keep this bad air from passing back into living spaces within buildings. However, during the Broad Street cholera outbreak in London, in the summer of 1854, physician John Snow , among others, worked to prove that polluted water was the culprit, not the foul smells from sewage pipes or ...

  4. 13 Habits That Are Secretly Making Your House Smelly ... - AOL

    www.aol.com/13-habits-secretly-making-house...

    By not washing your bedding routinely, these scent drift into the air and provide a musty smell that is easily removed with a toss in the wash. You should wash your sheets and pillowcases every ...

  5. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    Air admittance valves (AAVs, or commonly referred to in the UK as Durgo valves and in the US as Studor vents and Sure-Vent®) are negative-pressure-activated, one-way mechanical valves, used in a plumbing or drainage venting system to eliminate the need for conventional pipe venting and roof penetrations.

  6. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Because of its shape, the trap retains some water after the fixture's use. This water creates an air seal that prevents sewer gas from passing from the drain pipes back into the building. Essentially all plumbing fixtures including sinks, bathtubs, and showers must be equipped with either an internal or external trap.

  7. 'Tremendous smell': Dispatch logs detail chaotic scene at ...

    www.aol.com/tremendous-smell-dispatch-logs...

    According to the computer-aided dispatch log, a bad smell was reported on the back side of the store at 1:29 p.m. local time. The store was evacuated and shut down right after that. Kroger was ...

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