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Every two weeks I have to put hot water down the tub or sink to stop the toilet flushing from making it gurgle. Is it a clog in the line or the vent on the roof? Any suggestions please? Or is it ok to just do this every two weeks? There is no odor. Thank you!

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    You have a venting problem. If this has been the case since the beginning it's likely poor plumbing installation. If it's recently started then perhaps your vent has become clogged or blocked.
    – jwh20
    Jul 25 at 0:14
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You might have a grease blockage in the main line to the outside of the home. I would check your cleanout outside and see if you have any grease residue in it.

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  • Another possible cause is tree roots invading the main line outdoors. Jul 26 at 15:39

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