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 03-02-2011, 08:24 AM   #1
Newbie
 
Join Date: Mar 2011
Posts: 7
Share |
Default

Venting a new bath in basement


I'm putting a new 3 fixture bathroom into a cape cod house in NJ in the basement. The 3"(or 4") sewer line is below the basement level. Currently there is only one bathroom(3 fixture) on the main floor, plus a kithen sink. The stack is a 3" cast iron that goes out to the roof. It comes straight down into the basement floor at the back of the house. There is a utilty sink in the basement that was added after the house was built.
There are three 1.5" auxillary stacks also going up and out. One is near the kitchen sink and one is near the main floor bath tub and the 3'd was added at the connection to the downstairs utility sink. This third one is tied into either the 3" stack or to the kitchen 1.5" stack somewhere in the upstairs wall.
My plan was to add a toilet,sink and shower all close to the main stack line connected in the basement floor using Y tees.
My questions are;
1- Can I tee into the 1.5 inch vent with all three basment fixtures? I see some people say a 3" toilet drain requires a 2" vent, but I also see just as many arguements that a 1.5 is adequate.
2- If the toilet drain total length to the stack is less then 5' do I even need to vent it? The stack has the upstairs toilet tied into it, so I'm thinking the stack cannot be used as a wet vent?

3- If I need to vent the toilet, how do I tee off the toilet drain? Normally the toilet drains go to the rear of the toilet and the vent stack is teed in the wall. In my case the toilet drain will be in the cement floor going forward to meet the sewer line drain?

Any suggestions are appreciated.
Thanks!


Last edited by jerryls; 03-02-2011 at 08:26 AM.
jerryls is offline   Reply With Quote
Old 03-02-2011, 08:54 AM   #2
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

Venting a new bath in basement


Toilet needs a minimum 2" vent.

If your stack goes all the way through the roof you shouldn't need a vent if you're within the distance you specified above.

If you want to vent it separately your tee fitting for the vent needs to be underneath a wall.

EDIT : There is no 'normally' for toilet drains and which direction they go.

__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 03-03-2011, 08:47 AM   #3
Newbie
 
Join Date: Mar 2011
Posts: 7
Default

Venting a new bath in basement


[quote=Alan;600956]Toilet needs a minimum 2" vent.

"If your stack goes all the way through the roof you shouldn't need a vent if you're within the distance you specified above."

Alan, thanks for the reply. Yes all three fixtures will be less then 5'(total pipe distance) from the stack connected under the floor to the line that goes from the stack to the sewer. The stack goes straight out to the roof, but the upstairs toilet drain is also connected to that stack. I read conflicting statements that I can't do this for proper toilet ventilation? I just want to be sure.
Thanks Again.

Last edited by jerryls; 03-03-2011 at 08:50 AM.
jerryls is offline   Reply With Quote
Old 03-03-2011, 09:12 AM   #4
Member
 
Join Date: Aug 2010
Posts: 601
Default

Venting a new bath in basement


in my code, you cannot wet vent between floors. you also cannot wet vent a water closet with another water closet (one and two fixture unit traps only) you can run a vent up the wall and tie in to the original vent above the flood level of the upper fixtures, which is generally 42" above the floor.
the_man is offline   Reply With Quote
Old 03-03-2011, 09:19 AM   #5
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Default

Venting a new bath in basement


I'm with "The Man" on this one, as I believe this is code in my area as well.

Mark
__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 03-03-2011, 10:22 AM   #6
Newbie
 
Join Date: Mar 2011
Posts: 7
Default

Venting a new bath in basement


Quote:
Originally Posted by the_man View Post
in my code, you cannot wet vent between floors. you also cannot wet vent a water closet with another water closet (one and two fixture unit traps only) you can run a vent up the wall and tie in to the original vent above the flood level of the upper fixtures, which is generally 42" above the floor.
Thanks- that is what i was afraid of- how do i tie into the new toilet drain for the new vent if it's going in the floor away from the wall? can i just use one of those vented elbows going back? it will always have a little water in it though?
jerryls is offline   Reply With Quote
Old 03-03-2011, 06:52 PM   #7
Member
 
Join Date: Aug 2010
Posts: 601
Default

Venting a new bath in basement


Quote:
Originally Posted by jerryls View Post
Thanks- that is what i was afraid of- how do i tie into the new toilet drain for the new vent if it's going in the floor away from the wall? can i just use one of those vented elbows going back? it will always have a little water in it though?
i think you're talking about a low heel 90... can't use them like that. i believe the only way they're allowed is with the heel on the top, makes it like a reducing san tee. you can use a wye for the vent when the pipe is horizontal, but the branch must be above the centerline of the drain. some pics or a drawing will help us tell you the best place to run it
the_man is offline   Reply With Quote
Old 03-04-2011, 08:20 AM   #8
Newbie
 
Join Date: Mar 2011
Posts: 7
Default

Venting a new bath in basement


Quote:
Originally Posted by the_man View Post
i think you're talking about a low heel 90... can't use them like that. i believe the only way they're allowed is with the heel on the top, makes it like a reducing san tee. you can use a wye for the vent when the pipe is horizontal, but the branch must be above the centerline of the drain. some pics or a drawing will help us tell you the best place to run it
Here is a picture of the existing stack/drain. The wall behind it is the back of the house. The new toilet will be to the right(where the yellow cabinet is). The drain will be in the floor connected with a Y toward the front of the house. I don't know how deep the sewer line is until I break up the cement, but it will be difficult to tee off the top of the new drain from the toilet for a vent, as I dont think the sewer line will be deep enough to do that. I plan on putting a 6" stud wall at the back of the house for other pipes, such as the sink and vent pipes that need to get over to the stack. The 1.5"(ID) galvanized pipe going up left of the stack is a vent pipe.
Thanks
Attached Thumbnails
Venting a new bath in basement-emerson-183.jpg  
jerryls is offline   Reply With Quote
Old 03-04-2011, 09:01 AM   #9
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

Venting a new bath in basement


I did not see any info on what fixtures if any were tied into that stack on the upper level. If they are, then you shouldn't be using it as a vent as stated above, HOWEVER, my code does allow deviation for existing buildings if you have approval from the authority having jurisdiction prior to starting the work.

__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 03-04-2011, 09:24 AM   #10
Newbie
 
Join Date: Mar 2011
Posts: 7
Default

Venting a new bath in basement


3 bathroom fixture and a kitchen sink are tied into it stairs. Howewver, the kitchen sink and the tub are auxilary vented out the roof with 1.5" pipe. I can ask the town plumbing inspector, but I was trying to avoid submitting twice. Besides typically in NJ when you ask a question, they tell you to hire a plumber, as they assume you don't know what you are doing. That is why I'm asking these questions to try and get it right the first time.
Thanks,
Jerry

jerryls 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
Bath fan venting Alvis Plumbing 8 02-17-2011 06:48 PM
How to solve problem of moist basement walls moist Building & Construction 4 08-30-2010 05:18 PM
Adding Subpanel for Basement - Few Questions mindle Electrical 28 01-07-2010 08:49 AM
Basement Bath advice... jfls45 Remodeling 4 06-09-2009 06:10 AM
Full bath in basement - Questions whirly Plumbing 7 04-05-2009 06:15 PM




Top of Page | View New Posts

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