Re: Toliet bubbles
Posted by e-plumber on May 01, 2004 at 11:22:01:
In response to Re: Toliet bubbles
: When draining tub air bubbles from toliet and sink drains.

You most likely have a drain clog/partial restriction that needs to be snaked & cleared. The access to snake the line will be either from the toilet drain, or a clean-out fitting on the drain line below the toilet.
...If you have a house trap before the main drain leaves the house, check that for an obstruction which can cause a problem like yours.

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