Bubbling in my pipes!

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mojorisin23

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Hi
my downstairs bathroom was below the sewer grade when i bought my house. i had a pump installed in the garage (they share a wall) which then ran vertically out of the pump then along the ceiling of the garage back towards the house, then into the foundation wall down into the basement, finally connecting to the sewer line.

However, 8 years on, many times after the bathroom is used, about 5 min after the pump ran, i hear this gurgling/ bubbling coming from the pipe where it drops from the garage ceiling down towards the basement. My bedroom is above the garage so its very clear to hear. i'll get a triple gurgle...a pause for about 5 seconds, then another triple gurgle. it'll go like that for a good 30-60 mins.

Any ideas why this is happening and what i can do to solve it?

THANKS!
 

Reach4

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I would suspect a leaking check valve. A check valve is a one-way valve.
 

Reach4

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Smell: I presume there is a vent pipe on the sealed septic pit, and the seal keeps odors confined.

Backflow... The amount of backflow would be limited by the capacity of the pipe. The pipe pumps up, and then down. So there is a limit to how much could backflow.

I am not a plumber. My suspicion could easily be wrong.
 
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