Snaking a vent stack from the roof would.
Snake vent pipe roof.
You will need a ladder to access the roof.
For those items you can t remove from above run the plumber s snake down the vent pipe.
If they become blocked your system won t drain properly.
To continue feed the end of a garden hose down the vent and have someone on the ground turn on the water.
Remove any items you can reach.
Use a flashlight to shine a bright light down the vent pipe to look for further blockage you can reach.
Pipes on your roof.
Located on the roof these vent pipes allow gases to escape from your sewer system.
In most cases the vent pipe exits through the roof.
If you can see but can t reach run a plumber s snake down the vent pipe.
They regulate the air pressure in your system allowing waste to flow freely.
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Then try the following.
Sewer vent pipe location.
Sometimes it might be in your yard.
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Look for a black pipe that is about three inches in diameter made of cast iron or pvc.
Feed the end of a garden hose down the vent pipe and have someone on the ground turn on the water.
If possible shine a flashlight down the pipe to look for the blockage.
Look for a narrow plastic or metal pipe protruding from the roof roughly above the sink or toilet with the drainage problem.
To do it yourself start by clearing debris from around the pipe.
Here s a closer look at this issue.