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 04-17-2006, 09:25 AM   #1
Member
 
Join Date: Apr 2006
Posts: 88
Share |
Default

To vent or not to vent?


Adding a second floor to my house. There will be a half-bath on that level. The toilet and sink will be about 18 feet from the existing 3 inch pipe that goes vertically from the basement and up through the roof (main floor toilet and fixtures all connect to this pipe). Question is...can I simply run the toilet and sink drains horizontally and tie in where that 3" pipe passes through the new 2nd floor? If not, what venting arrangement should I have for this new bathroom? Does this arrangement require a separate pipe through the roof, or is there a way (is it ok) to connect to the existing vent in the attic? Thanks a ton!!

sootybuttercup is offline   Reply With Quote
Old 04-17-2006, 09:41 PM   #2
A Builder & Plumber
 
Join Date: Apr 2006
Location: Farmville, VA
Posts: 25
Default

To vent or not to vent?


I am a licensed master plumber.
I believe I answered your question in another forum you posted in. I can not copy the link or copy and paste the post, so I'l try to re write it
You can not run 18 feet with the pipe horizontal because you will kill the vent, every trap and trapped fixture needs a vent which can be achieved in any number of ways,
1) Air admittance valve
2) Wet venting
3) Direct vent
First lets say we will use a 3" line horizontally (Sufficiant for toilet and sink, 4" is overkill) Now try to run the line from the toilet to where the sink line will drop down under the floor. Here we should use a 3" x 2" tee wey so we can connect the sink drain in with the toilet. Make sure the 2" side is at the top or at minimal 45 degrees off center (It can not be laid flat as this will kill the vent). Now we can tie in a line for the sink. Run your pipe up through the wall and use a 2"x1-1/2" x 1-1/2" sanitary tee (The 2" opening is at the bottom, the 1-1/2" will point upward to the attic, the other 1-1/2" will catch the sinks drain) Next run 1-1/2" pipe up into the attic, turn a 90 (Elbow) toward the existing vent that goe's through the roof and tie it in (At this point you will want this sanitary tee to be installed upside down for venting) Back under the floor finish running the horizontal and tie into the existing drain. This should work fine, if not you can email me and tell me why it will not work and I can guid you from there. Good luck! And bear in mind that any line used as a vent can not be run horizontally untill it is 6" or higher than the flood rim of the highest fixture it serves

Oldman 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
Yoke vent for water closet kenlog Plumbing 4 07-13-2007 06:34 PM
Bathroom Vent Not Vented to Outside / Would need to vent through flat roof House_Amuck HVAC 5 03-30-2007 09:57 AM
Roughed in basement vent question jeffgator Plumbing 5 01-27-2007 11:48 AM
Ridge Vent - Low-pitched roof? brianp Roofing/Siding 2 05-08-2006 08:32 PM
Island Hood Vent Centering Problems Dana Remodeling 2 07-13-2005 07:37 AM




Top of Page | View New Posts

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