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Because either the trap has evaporated thus allowing sewer gases to enter Or because of soap scum build up from the laundry room and grease deposits from the kitchen sink waste this allows odor causing bacteria to thrive.. The drain lines should be water jetted clean (scoured)

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Q: Why does the floor drain in my basement laundry room smell so bad?
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Related questions

How do you identify a sewer gas smell in basement bathroom?

Most likely a drain has dried out and there is no water in the trap to stop the gas from coming up. Sink, shower, or main floor drain.


Sewer smell in the basement when it rains?

Could be caused by a couple of things. If you have an onsite septic system (tank and drain field) the tank may be full, and the rainwater is causing it's contents to backup the main drain back in to the house. A vent pipe could be plugged, which causes the sewer gas to back up. If you are hooked to a public sewer, there may be a blockage in the main drain out to the line in the street. Have a plumbing contractor check it out. It can be very dangerous.


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Your basement smells like moth balls because you either have the camphor smell throughout your basement or your wall contains the chemical agents in moth balls


What could be wrong if there is a strong sewer gas smell whenever any of the faucets or shower is running and the water pressure has decreased significantly?

Is there a floor drain or any other drain nearby that is not used often? Sometimes the p-trap in a drain will dry out and allow sewer gas to escape. The smell becomes more intense when hot water goes down the drain.


Why would there be a sewer gas smell in the basement landing whenever the downstairs toilet which backs up to landing the is flushed?

If there's a basement floor drain close by, sometimes the all the water can evaporate out of the trap. This can allow sewer smells into the house. Just run some water thruough the floor drain to fill the trap back up. Ditto for any drain that doesn't get used very often. More input from FAQ Farmers: * Maybe the vent in the wall isn't connected properly or came apart. I would think you'd have a sewer smell all the time but maybe it just gets bad enough when things get stirred up to notice. * Vent pipes are a major source of sewer odors. Vent pipe filters eliminate these odors while removing greenhouse gases. Used zeocarbon is then put back into the soil.


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Where can the sewer gas smell come from if it does not come from the drain of the ower- level on-a-slab shower?

One of the biggest culprits I have found for sewer gas smell is the floor drain many floor drains are seldom if ever used and if unused long enough the water in the trap will evaporate allowing sewer gas to enter the dwelling. this also applies to any trap which is not used regularly.


How do you get rid of a bad smell coming from a tub drain that is rarely used not clogged and has been cleaned but the smell remains?

Try pouring vinegar and baking soda down the drain, or maybe borax laundry powder. Let it sit for a while before running water. If that doesn't work I'd call a plumber. Maybe you need new pipes?


2001 mitsubushi galant is leaking water inside on floor board what causing it?

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Why would sewer gas smells start after an inexplicable leak under the utility sink in the basement which is now dry?

The trap in the drain line under the sink is dry. It should have water in it to stop the smell