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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-12-2011, 04:59 AM   #1
Member
 
Join Date: Jun 2008
Posts: 841
Share |
Default

main plumbing stack 3" code comply or 4"


Does a 3" stack/vent comply with all codes? Simple small home , connected to within 5',,,kitchen sink,,,, (NO dishwasher),,,, laundry washer drain,,,,, (normal bath fixtures) stool sink and tub/shower. Just one bathroom in this single story house.

What are advantages and disadvantages of 4" pipe???? 3 would fit so much better. Heard it had better flow than 4,,,true or not???

4just1don is offline   Reply With Quote
Old 08-12-2011, 08:45 AM   #2
moderator
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: Idaho
Posts: 6,785
Default

main plumbing stack 3" code comply or 4"


The simple answer is to contact your plumbing inspector. The fixtures you list could be vented on 2". But since that is all of the fixtures in your house, the cross sectional area of the vent needs to be at least equal to the area of the bldg drain, which in your case is 3". To add a twist--My state says all bldg drains must be 4" exiting the bldg regardless of the fixture load. Every plumber here has different code variations so you might here different answers.

TheEplumber is offline   Reply With Quote
Old 08-12-2011, 09:08 AM   #3
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,744
Send a message via AIM to Alan Send a message via MSN to Alan
Default

main plumbing stack 3" code comply or 4"


Quote:
Originally Posted by TheEplumber View Post
The simple answer is to contact your plumbing inspector. The fixtures you list could be vented on 2". But since that is all of the fixtures in your house, the cross sectional area of the vent needs to be at least equal to the area of the bldg drain, which in your case is 3". To add a twist--My state says all bldg drains must be 4" exiting the bldg regardless of the fixture load. Every plumber here has different code variations so you might here different answers.
Our code says it has to be equal to the MINIMUM REQUIRED building drain.

So we could stub out an 8" building drain and still only require equivalent to a 3" vent.

Why would we do that? We wouldn't, but it sure would be fun to drive around with 8" pipe on the truck all day.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
3" Remodel Recessed Lighting Question - Code easelpad Electrical 2 01-07-2011 08:29 AM
Wiring Size Calculations for New Service CorinthWest Electrical 7 12-07-2010 11:36 AM
Can I comply with code in this situation? pcampbell Electrical 10 11-15-2008 07:32 AM
Code Question: Electrical and plumbing ELurie Electrical 2 08-22-2007 08:55 PM
DWV Stack Question dcgray2 Plumbing 9 07-14-2006 12:56 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.