Toilet stack vent questions

[nat]

I am planning on relocating a toilet, so I will be plumbing in a new stack.

My question is, how far away can I put a vent? What size vent can I use? The old house of course has 4" vents gong up in extra thick walls.

 

[Rocinante]

I would check your local plumbing codes. It should have a formula to determine the distances/size.

 

[EricG]

Venting can be tricky - you need to check your local code.
Off the top of my head, I think you can go as small as 1.5" for the vent diameter on a toilet and up to 6' from the toilet to the vent. But again, check your local code to be sure.

 

[Koffer]

or do like the PO did here at my shack and say "f" it and not put one in at all :rolleyesfor the closet thats called a 2nd bathroon where you need to set onto the shower stall to close the door that only opens half way as it hits the crapper .

 

[GAS-A-LOT!]

1.5" vent is fine... at least here in Los Angeles....
with a 4" crap shoot!