Vent pipe goes up to 7' inside exterior wall. 45 elbow directs vent
pipe into garage. Another 45 elbow in garage sends pipe vertical
through garage roof.
Looks like this->
It's a 2 floor house with attached garage. When vent pipe exits
garage roof, it's right next to 2nd floor exterior wall. 1) Exterior
wall needs to be resided and contractor wants the pipe moved to ease
his repair job. 2)Vent pipe collar flashing thingy extends under
current siding. The house has original siding and then vinyl siding
over it and that makes siding go over the vent collar.
My Proposed solution:
Cut vent pipe in garage after first 45 elbow exiting from wall. Add
second 45 elbow to make vent pipe go horizontal. Add another 12" pipe
to move it further away from wall. Then 90 elbow going through new
hole in roof.
1) Is it legal to make vent pipe go horizontal?
2) How far does the vent pipe need to extend above the garage roof? I
was going to measure the existing one, but the code could have changed
since the house was built 45 years ago.