City Sewage Vent Size - Plumbing - DIY Home Improvement | DIYChatroom


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 10-12-2013, 11:21 PM   #1
Newbie
 
Join Date: Oct 2013
Posts: 1
Rewards Points: 10
Default

city sewage vent size


city main sewage vent line going thru the bathroom is a cast iron 6 inch pipe. we would like to move that vent line and make it smaller like a 3 inch line to be install in the wall vs outside of the wall in the bathroom. Can we change that line to smaller size and re-locate that vent line? we are remodeling the bathroom is the reason why I am asking. We live in MA.

Advertisement

bwilliams1837 is offline   Reply With Quote
Old 10-13-2013, 08:55 AM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,728
Rewards Points: 572
Default

city sewage vent size


How many fixtures is it serving?
100% sure it's 6"?
http://www.engineeringtoolbox.com/ca...ns-d_1751.html
Got a picture so we can see how far it sticks out?

Advertisement

__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is online now   Reply With Quote
The Following User Says Thank You to joecaption For This Useful Post:
plummen (10-13-2013)
Old 10-13-2013, 03:44 PM   #3
Plumber/Contractor
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 7,250
Rewards Points: 2,618
Default

city sewage vent size


This would be the first house I've seen with a 6" vent.
It's probably 4". But typically you cannot downsize vents.
Best to call your authority having jurisdiction.
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote
Old 10-13-2013, 07:36 PM   #4
Member
 
Join Date: Oct 2011
Location: pa
Posts: 4,614
Rewards Points: 2,542
Default

city sewage vent size


agree with e plumber my guess 4" castiron ..and no you can not reduce a vent in size if you are doing a remodel get your permits and ask inspector to come out for a consoltation and get his opinion on what you are going to do ...ben sr
ben's plumbing is online now   Reply With Quote
Old 10-13-2013, 10:08 PM   #5
retired elect/hvac/plumb
 
plummen's Avatar
 
Join Date: Jan 2010
Location: south east of omaha/The island of misfit contractors
Posts: 2,916
Rewards Points: 2,010
Default

city sewage vent size


Maybe hes looking at the o.d of the 4" cast and thinking its 6" coming through the roof.
Even a 4" vent all the way through up through a bathroom is awfully big unless youve got a lot of fixtures tied into it,around here an average vent is 2-3" and gets upsized to 4" 12" below the roof line to keep it from icing up in the winter.
__________________
"facts" have no relevance to this discusion
Posting from a concrete bunker under a non descript barn
plummen is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to calculate sewage ejector size Daugela Plumbing 0 05-05-2013 05:00 PM
Relocating water heater - impact on vent size? kneedragger37 HVAC 10 02-23-2013 03:09 PM
Air vent size harmonyhill Plumbing 1 07-23-2012 10:28 AM
Help with basement bathroom vent satchfan Plumbing 3 12-26-2010 10:35 PM
Foundation crawl space vent size problem Constant Improvement Building & Construction 15 01-15-2009 06:07 PM




Top of Page | View New Posts