I snaked the tub at the overflow, the tub drains but he toilet bubbles and drains very slowly when flushed. What should I look for?

The bubbles say to look for a blockage downstream from the tub in the toilets drain line If the toilet gurgles instead of bubbling then I would suspect the lavatory roof vent. Any back up into the tub?
Are you quite sure it's a bubble and not a gurgle? Do you see bubbles in the toilet or simply hear them? Back to you, Tom

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Originally Posted by speedball1

The bubbles say to look for a blockage downstream from the tub in the toilets drain line If the toilet gurgles instead of bubbling then I would suspect the lavatory roof vent. Any back up into the tub?
Are you quite sure it's a bubble and not a gurgle? Do you see bubbles in the toilet or simply hear them? Back to you, Tom

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Tom, there is no backup in the tubs. But it did gurgle as I snaked the line from the tub

Tom, there is no back up in the tubs, but it did gurgle as I snaked the line from the tub. If the vent line is the problem what do I do to clear the vent at the roof?

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If the vent line is the problem what do I do to clear the vent at the roof

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If your snake's too short you rent a sewer machine, (see image) and snake from the lavatory roof vent. Put 9out enough snake to reach the base and 18 feet more to get out to the main. Good luck, Tom