Max Length For A Drain Pipe W/o Vent - 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 02-26-2008, 09:32 PM   #1
Member
 
Join Date: Jan 2008
Posts: 95
Rewards Points: 75
Default

Max length for a drain pipe w/o vent


What is the max length a drain pipe can be from the main stack w/o needing its own vent?

Advertisement

Bcoleman6 is offline   Reply With Quote
Old 02-26-2008, 10:01 PM   #2
Journeyman Plumber
 
Ron The Plumber's Avatar
 
Join Date: Jun 2006
Location: Eugene, Oregon
Posts: 1,994
Rewards Points: 1,000
Default

Max length for a drain pipe w/o vent


What size pipe are you talking about?

All lines need a vent.

Advertisement

__________________
Fix it right the first time, so you won't have to fix it a 2nd time.

2008 Oregon Specialty Plumbing Codes
Ron The Plumber is offline   Reply With Quote
Old 02-26-2008, 10:14 PM   #3
Member
 
Join Date: Jan 2008
Posts: 95
Rewards Points: 75
Default

Max length for a drain pipe w/o vent


The drain pipe in question is 2" and runs four feet into the main stack which is of course vented. I also have the same type of run from a washer drain. Does this work as the vent or does it need to be vented directly after the P trap.
Bcoleman6 is offline   Reply With Quote
Old 02-26-2008, 10:18 PM   #4
Journeyman Plumber
 
Ron The Plumber's Avatar
 
Join Date: Jun 2006
Location: Eugene, Oregon
Posts: 1,994
Rewards Points: 1,000
Default

Max length for a drain pipe w/o vent


You can run up to 5' on 2" according to my code before it has to connect to a vent, so 4' is good.
__________________
Fix it right the first time, so you won't have to fix it a 2nd time.

2008 Oregon Specialty Plumbing Codes
Ron The Plumber is offline   Reply With Quote
Old 02-26-2008, 10:24 PM   #5
Member
 
Join Date: Jan 2008
Posts: 95
Rewards Points: 75
Default

Max length for a drain pipe w/o vent


Thank you Ron.
Bcoleman6 is offline   Reply With Quote
Old 02-26-2008, 10:49 PM   #6
Member
 
Knucklez's Avatar
 
Join Date: Oct 2007
Location: ontario canada
Posts: 873
Rewards Points: 528
Default

Max length for a drain pipe w/o vent


ho hum...

my kitchen sink does not have a vent at all.. and it's drain is 20' before it reaches the laundry sink drain in the basement (same drain) which also does not have a vent. then another 15' to the sewer drain..

no vent at all..

i hear "gurgle gurgle" whenever a sink drains.. and who to you if you try to use the wash machine at the same time that the kitchen sink is full of water for doing dishes by hand or something...

best i can tell, its been like this for 50+ years in this house. amazing.

so... as part of my upcoming "my projects" project.. i have a full kitchen reno.

..

starting with a ceiling vent for the kitchen

Knucklez
Knucklez is offline   Reply With Quote
Old 02-26-2008, 10:54 PM   #7
Journeyman Plumber
 
Ron The Plumber's Avatar
 
Join Date: Jun 2006
Location: Eugene, Oregon
Posts: 1,994
Rewards Points: 1,000
Default

Max length for a drain pipe w/o vent


Surprise your not sick all the time from sewer gases entering the house do to no vents.
__________________
Fix it right the first time, so you won't have to fix it a 2nd time.

2008 Oregon Specialty Plumbing Codes
Ron The Plumber is offline   Reply With Quote
Old 05-05-2008, 07:39 PM   #8
Member
 
Knucklez's Avatar
 
Join Date: Oct 2007
Location: ontario canada
Posts: 873
Rewards Points: 528
Default

Max length for a drain pipe w/o vent


aye, me too. but can't smell any exaust so whatever sewer gas there is must not be that bad.

i'm reading a lot of your posts ron on the subject for my kitchen reno project. really great advise. hopefully i'll get all my questions answered just by reading the threads and won't even have to post any new ones

Knucklez
Knucklez is offline   Reply With Quote
Old 05-06-2008, 10:11 AM   #9
Member
 
Join Date: Sep 2006
Posts: 1,670
Rewards Points: 1,000
Default

Max length for a drain pipe w/o vent


Although I am aware that Code can change by area, I have not heard of a non-vented drainline, which also has a trap connected. Anytime water is discharged from another nearby drain, it causes a vacuum that can suck the water out of the trap and allow sewer gas to enter the home.

Advertisement

__________________
If you have never made a mistake, you haven't done much.
majakdragon 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
framing conundrum: 2" PVC vent pipe going horizontal through 2x4 studs amakarevic Building & Construction 18 01-19-2008 07:47 PM
Where is the toilet vent?!?!? domgbrown Plumbing 4 01-11-2008 07:33 PM
The Bioswale, french drain, deck, drainage dilemma (long) seabright_sc Building & Construction 2 01-05-2008 04:37 PM
washer drain pipe paydelady Plumbing 3 11-13-2007 01:27 AM
Vent Pipe Leak romeguy1 Plumbing 9 12-11-2005 01:08 AM




Top of Page | View New Posts