Is this critical vent distance to be measured by linear feet of pipe, from say, the toilet flange to the vent?

Or, measured in a straight line from the toilet flange to the vent?

Thanks!

Joe

Hi Joe... distance from vent to trap is measured in linear feet from the trap (weir), along the waste line to the vent connection fitting center line.

Usually measured straight line... if it gets close some inspectors wll tell you linear feet counts... but from everyday installation practices it's straight line...

Is this critical vent distance to be measured by linear feet of pipe, from say, the toilet flange to the vent?

Or, measured in a straight line from the toilet flange to the vent?

Thanks!

joe
Thanks for your answer... But I'm not sure who to listen too... :) Here is what another guy answered

"usually measured straight line....if it gets close some inspectors wll tell you linear feet counts....but from everyday installation practices it's straight line...."

Do you agree with him?

Thanks!

Joe

Yes I agree... but it is linear feet from where the vent ties into the sewer line from the toilet,, not across the floor... hopefully this helps

Joe... distance trap to vent is a linear foot measurement.. period. True, not all inspectors take out tape measure and measure... but technically... all about linear feet from trap (trap weir) to center vent fitting. Good luck.

Thanks for your answer... But I'm not sure who to listen too... :) Here is what another guy answered

"usually measured straight line....if it gets close some inspectors wll tell you linear feet counts....but from everyday installation practices it's straight line...."

Do you agree with him?

thanks!

joe

Most codes specify 'Developed Length' when referring to the maximum length of a trap-arm, which also includes measuring the radius of all offsets and bends.

joepappalardo
New Member Join Date: Mar 2008
Posts: 2
Hi Tom,
Is this critical vent distance rule to be measured by linear feet of pipe, from say, the toilet flange to the vent?
Or, measured in a straight line from the toilet flange to the vent?
Thanks for your help Tom..
joe
Hi Joe, Thanks for the nice words in your PM. The distance between a fixture trap and vent is measured in developed length and not in a straight line. Since you ask about a toilet I'm going to assume the pipe size is three inches. Different Plumbing Codes will be off from one another so SPC and IPC list three inch as 10' from the flange to the vent while UPC only lets you go 6'. If you can explain, in detail, what you're doing we might find out your toilet's already wet vented. Back to you. Regards, Tom

-Hey Tom, thanks for your reply, it cleared things up for me. To tell you a little bit about what I have going on... I'm doing a 5x8 bath remodel in a 1950's home. It has a 4" cast iron stack and a 3" cast vent. The "designer decided to move the toilet across the room, putting the new toilet flang (to be) 12 "pipe" feet from the hub of the exist. cast vent.

So if we think from Left to Right, here's what I plan to do (unless you tell me otherwise)

(From left to right) new sink, go 27", toilet flang (center), go
16" (with 4" pvc) , put 3"x 4" vent-T to go up wall through roof, go 16", then a 4" "long/sweep" 90 deg. Pointing down into basement at 45 deg. Angle, go +/- 10" into a sanatary-tee-hub that I'll cut into the 4" cast waste stack using banded ferncos... The other side of the san-tee-hub I'll put a reduce bushing (4" to 2" for the shower...

Ok.. so rip me apart What would you do (if the above makes any sense)