Venting A Kitchen Sink - 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 11-11-2010, 11:54 PM   #1
Newbie
 
Join Date: Nov 2010
Posts: 4
Rewards Points: 10
Default

Venting a kitchen sink


Hey guys,

I'm doing a kitchen remodel and I'm trying to figure out how to vent my sink. It's a window sink and would rather not vent the p-trap through the wall as this would require two perforations of the cabinet.

Anyways, I was thinking of draining the p-trap into a vertical line down under the floor. Down stream of this line is the septic system and up stream is a vent pipe (horizontal along the floor until it reaches a wall and goes up into the attic and out through the roof)

p-trap
||
||
to septic ============================ to vent stack

Does anyone know if this setup would cause an issue? I'm in Ontario as well if that matters at all.

Thanks

Advertisement

ultracrystal is offline   Reply With Quote
Old 11-12-2010, 01:03 AM   #2
Plumber/Contractor
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 7,259
Rewards Points: 2,610
Default

Venting a kitchen sink


Sounds like your making an s-trap. Would not be acceptable in my area.

Advertisement

TheEplumber is online now   Reply With Quote
Old 11-12-2010, 07:03 AM   #3
Newbie
 
Join Date: Nov 2010
Posts: 4
Rewards Points: 10
Default

Venting a kitchen sink


Excellent. Now that I know it's called an s-trap I've verified that I can't do this.

Thanks for the info. Back to the drawing board I go
ultracrystal is offline   Reply With Quote
Old 11-12-2010, 08:01 AM   #4
Plumb or Die!
 
Join Date: Oct 2010
Location: BC, Canada
Posts: 321
Rewards Points: 250
Default

Venting a kitchen sink


Crawlspace or unfinished basement? If your main drain below your kitchen is located close enough, and the pipe is high enough, you can have the p-trap below the floor, the pipe from the sink drain can go straight through the bottom of the cabinet and into the trap. Then run your horizontal part of the sink drain and tie into your main septic line.
The rules on this are: the fixture outlet pipe (from the sink to the p-trap) cannot exceed 48". The trap arm (from the trap to the main drain) must not exceed 5' for 1 1/2" pipe or 8' for 2" pipe. These are newish rules in the National Plumbing Code in Canada. Hope this makes sense, and good luck!
plumber666 is offline   Reply With Quote
Old 11-12-2010, 08:59 AM   #5
Newbie
 
Join Date: Nov 2010
Posts: 4
Rewards Points: 10
Default

Venting a kitchen sink


My basement is unfinished (for now) and will only ever have a suspended ceiling. I was thinking about what you are proposing as well. Actually, it would be nice because it would minimze the amount of plumbing in the cabinet itself.

What about the vent though? Is it ok that the p-trap would run into a t-fitting to which a horizontal vent pipe would be connected before going up vertical?
ultracrystal is offline   Reply With Quote
Old 11-14-2010, 10:33 PM   #6
Picky Plumber
 
Join Date: Nov 2010
Location: North Carolina
Posts: 138
Rewards Points: 75
Default

Venting a kitchen sink


That would be "okay" but, an even better idea would be to drill a 2'' hole in the cabinet (back corner, opposite the disposal if you have one). Then, you'll attach an end outlet waste assembly to strainers on sink and trap above the cabinet. You'll then go into a sanitary tee and pipe the part going through the cabinet into the existing drain below. On the top side of the tee, you'll run a piece of pipe up and install an air admittance valve at the top.... That will be your vent. Better this way, that way if/when your drain gets clogged, the trap can be easily removed for cleaning.

Advertisement

Plumber26 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
Smell Under Kitchen Sink mamaerin General DIY Discussions 4 09-23-2009 12:01 PM
Help moving kitchen sink pflaxman Plumbing 2 09-22-2009 01:19 AM
Anybody install or own a CORNER kitchen sink? Also RTA cabs... matermark Kitchen & Bath Remodeling 2 01-24-2009 06:41 PM
vent stack for kitchen sink Knucklez Plumbing 4 04-02-2008 07:49 PM
Sink or No Sink in Kitchen Island? Not Sure Plumbing 4 08-29-2006 08:37 PM




Top of Page | View New Posts