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I suspect that you have a "p" trap in either a floor drain, or possible the laundry tub or a sink somewhere in the house. If you look under the kitchen sink, or a lavatory in the bathroom you can see a p-trap, it's shaped sort of like the curved part of the letter p. The purpose of the p-trap is to trap, or prevent, sewer gasses in the sewer lines from backing up into the house. By design, p-traps catch and hold some water, which blocks the pipe and stops the gas from coming up through the drain. IF you have a floor drain, or a lavatory drain, either of which don't get used enough to keep the water in the trap from evaporating away, leaving the drain pipe open, then when a lot of water is poured or flushed, pumped out of a washer, then that flowing water will push sewer gasses back up through the drain with the dry p-trap. What you are smelling is sewer gas.

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16y ago
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13y ago

because if we are not provide u trap in drain line other wise battle value inside the trap

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Q: Why would your house smell like sewer whenever you run the washer or dishwasher?
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Related questions

What is wrong when the drain in garage overflows every time the washer runs?

Storm sewer is crossed with the sanitary sewer or the washer drains into the storm sewer. Either way the storm sewer is likely blocked somewhere.


Can an unused dishwasher cause a sewer smell in the house?

yes. water caught in the drain line may contain food particulate which can decompose and cause gasses to escape back into the house.


Where does the water in the washer drain to?

It goes into the main sewer system. It will go through your sewer system and then out to the main sewer. That is if you live in town!


What size main sewer line is required to have 3 toilets in a house?

3" house (building) drain allowable. 4" building sewer line needed for house from sewer main.


Your sewer outlet is lower than the main sewer lines what are your options?

A little more detail about the sitsuation would help. New construction, remodel, sewer outlet in the house to street or sewer outlet in house to main going out of house.


Are cast iron sewer lines 4 inches?

4" is the standard house sewer main


Town sewer pipes covered house to road?

Not normally even the connection to the public sewer is not covered


When the washer drains it sucks the water out of the toilet?

Sounds like your washer doesn't have a connection to your "stack pipe". As water moves through a drain pipe, it creates a vacuum behind it, the "stack pipe" or "vent pipe" is usually a pipe that goes through the roof of your house and provides an open air connection to all of your plumbing fixtures so the vacuum is provided a way to suck air rather than sucking the water out of your "P" traps or other fixtures such as your toilet. Chances are your toilet is also "sucking" from your washer, but you just don't notice it. It is also dangerous because if the washer or other fixtures are sucking water out of your "P" traps, then you may be getting methane and other sewer gases into your house. Have a pipe run from washer drain to your vent pipe and this should eliminate the problem. Be sure it connects to the vent pipe because if you ever have a sewer backup, the vent system won't allow the gray water to empty into your house through the air pipe.


How do you prevent sewer line backing up into basement?

Install a one way check valve in the line from the house to the sewer.


Is it legal to have your washing machine drain into your sump pump which is connected to the main sewer pipe?

No! Dumping the washer output into the sump is illegal.


Where do you find the sewer pipe?

under ground behind your house.


How much does it cost to dig a sewer line for a new house?

$58,960