Sometimes vents like this had to be.
Vent pipe in attic.
For some homes the pipes will run underneath a subfloor or at the bottom of the attic.
These are excellent options when your sink is too far away from the main stack.
Is unusual although it may be required by your local plumbing code.
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Just as drain pipes remove water and waste from your home the plumbing vent pipe also known as a plumbing air vent removes gas and odors.
The attic is usually colder than the rest of the house during the winter and that can create a problem for a dryer vent.
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The problem with attics.
The plumbing vent also known as a vent stack helps regulate the air pressure in your plumbing system.
First of all going from 3 in.
You may need to move the hole over a few inches.
The top plate may be doubled meaning you have to drill through 3 inches.
To run a vent pipe through the ceiling first drill a test hole to make sure you won t bump into any joists in the attic.
A full sized vent is a primary vent where the drain line transitions at some point and becomes the vent pipe that exits the roof.
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For other homes the pipes might be located in the walls or the roof rafters.
In many an older home this drain pipe is perhaps 4 inches in diameter and stays that size all the way through the roof.
Vent pipes look like sewer pipes.
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Transition coupling either plastic like this or banded rubber to join a 3 in.
It also allows fresh air into the plumbing system to help water flow smoothly through the drain.
Find out where the pipes are located to see if a ladder is needed to reach them or if you will have to work on your knees installing the insulation.
Re vent pipes otherwise known as auxiliary vents attach to the drain line near your fixture as they run upwards and over the main vent.
Only two plumbing set ups could require sewer pipes in the attic.
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