From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
Installing vent pipe through roof.
The true vent is aligned vertically and attaches to your drain line through the roof.
When calculating your chimney pipe size subtract 1 5 inches for each joint overlap.
True vents also have no water running through them.
With the pipe in a vertical position.
Install a sanitary tee.
There can t be any drains above the point.
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.
A single wall pipe will require 18 inch clearance to the ceiling while double wall pipe needs an 8 inch clearance to the ceiling.
Follow the outline you marked out.
2010 uniform plumbing code states.
The metal i m using is called crinkle black i purchased all my materials at h.
What is the normal size of most vent pipes.
Position the vent pipe up to the bottom of the roof.
4 repeat the ventilation process with any other fixtures you re installing.
Extend the vent pipe outside the building according to building regulations.
Cut through the plywood and roofing material with your reciprocating saw.
Vent a fixture by cutting into the drain line using a saw.
Try to keep it close to the fan location.
Leave the drill bit sticking through the roof so you can find the hole.
You will need to cut the opening to the roof to extend the chimney pipe.
Start in the attic and drill a hole through the roof in the desired vent location.
In this video i cover installing a roof boot for a vent pipe in a metal roof.
Below are some links to the tools i used on this project.
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.
A double wall pipe needs a 12 inch clearance space.
How to install a vent pipe through a roof step 1.
This vent pipe rises vertically towards the roof where it opens to the atmosphere to get the needed replacement air.
Go into your attic.
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.
Extend a pipe upward from the tee and tie it into the main vent stack.
