This is how i installed my dwv drain waste vent pipe through my metal roof.
Installing vent pipe through roof.
This is best implemented if a fixture rests close to the stack and the top floor of your home allowing the stack to serve as a vent.
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Extend a pipe upward from the tee and tie it into the main vent stack.
You will need to cut the opening to the roof to extend the chimney pipe.
Each vent pipe shall extend through its flashing and shall terminate vertically not less than six inches above the roof nor less than one foot from any vertical surface you can run the pipe at the exterior but you probably should extend above the roof line.
Follow the outline you marked out.
This vent pipe rises vertically towards the roof where it opens to the atmosphere to get the needed replacement air.
4 repeat the ventilation process with any other fixtures you re installing.
When calculating your chimney pipe size subtract 1 5 inches for each joint overlap.
With the pipe in a vertical position.
Position the vent pipe up to the bottom of the roof.
Extend the vent pipe outside the building according to building regulations.
Below are some links to the tools i used on this project.
Cut through the plywood and roofing material with your reciprocating saw.
How to install a vent pipe through a roof step 1.
Vent a fixture by cutting into the drain line using a saw.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
A single wall pipe will require 18 inch clearance to the ceiling while double wall pipe needs an 8 inch clearance to the ceiling.
The metal i m using is called crinkle black i purchased all my materials at h.
A double wall pipe needs a 12 inch clearance space.
In this video i cover installing a roof boot for a vent pipe in a metal roof.
2010 uniform plumbing code states.
Leave the drill bit sticking through the roof so you can find the hole.
Usually the vent pipe must extend six inches above the roof or 12 inches 30 5 cm away from vertical walls but double check your building codes and requirements to make sure.
Go into your attic.
Start in the attic and drill a hole through the roof in the desired vent location.
The true vent is aligned vertically and attaches to your drain line through the roof.
What is the normal size of most vent pipes.
Install a sanitary tee.
Try to keep it close to the fan location.
