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 11-06-2011, 04:59 PM   #1
Newbie
 
Join Date: Nov 2011
Posts: 4
Share |
Default

Basement Bathroom Rough In Questions


I'm getting ready to rough in a new bathroom in my basement and I have a few questions. I would really appreciate any advice.

I will be breaking into an existing 4" sewer pipe under the floor. Does the connection to this pipe (3" from my new bathroom group) have to enter the existing pipe above center? I will be connecting with a 4X4X3 reducing wye.

Same question futher up the line when the 2" drain pipe from the shower/lav connects to the 3" from the WC. This one will be wet venting.

I'm a bit concerned about depth. If all of the connections need to be above center I may run out of floor to bury my pipe in.

I will provide a scetch once I get a few basics out of the way.

Another question regarding closet flanges...

How do I install the toilet flange after I repour the floor? The ones I have seen a meant to go outside the 3" pipe that would be sticking up. I do not know how thick my floor will be once I level and tile. It seems like I might have to chip away some of the new floor to get the flange over the pipe after I level and tile. Am I missing something?

Thanks in adavance,

Mike

Mike Fox is offline   Reply With Quote
Old 11-06-2011, 05:29 PM   #2
moderator
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: Idaho
Posts: 6,532
Default

Basement Bathroom Rough In Questions


1. The 3' does not need to be above the flow line.
2. Vents do need to be above the flow line
3. When you stub the 3" up for the toilet, put 3 or 4 wraps of sill seal around it and pour the floor. After you have the finish flooring down, remove the sill seal, cut the riser off and glue on the flange. The hub will slide into the void left by the sill seal.
Please do upload a sketch. Interested in how you will vent the toilet

TheEplumber is online now   Reply With Quote
Old 11-06-2011, 11:46 PM   #3
Newbie
 
Join Date: Nov 2011
Posts: 4
Default

Basement Bathroom Rough In Questions


Here is my sketch. Comments are welcome...
Attached Thumbnails
Basement Bathroom Rough In Questions-rough2-1.jpg  
Mike Fox is offline   Reply With Quote
Old 11-07-2011, 06:55 AM   #4
Plumb or Die!
 
Join Date: Oct 2010
Location: BC, Canada
Posts: 321
Default

Basement Bathroom Rough In Questions


That whole mess of pipes coming off the vertical WC pipe can get moved to the horizontal line and save a bunch of grief and elevation loss. If wet venting is permitted where you live, you can lose the vent off the shower drain too, the sink will be wet venting both the toilet and the shower.
All your piping takeoffs can be off the centerline, don't have to be above.
plumber666 is offline   Reply With Quote
Old 11-07-2011, 06:58 AM   #5
Plumb or Die!
 
Join Date: Oct 2010
Location: BC, Canada
Posts: 321
Default

Basement Bathroom Rough In Questions


Also, get a 4"x3" closet 90 elbow. This gives you a 4" pipe sticking out the concrete. You can then saw off the pipe level with the floor and glue a 4"x3" flange right into the pipe. You're definitely on the right track and asking all the right questions, good luck!
plumber666 is offline   Reply With Quote
Old 11-07-2011, 07:00 AM   #6
Plumb or Die!
 
Join Date: Oct 2010
Location: BC, Canada
Posts: 321
Default

Basement Bathroom Rough In Questions


PS, just make sure your lav connection is within 6-8 feet of the shower drain, and 1/4" per foot slope on all piping. Keep shower drain line 2".
plumber666 is offline   Reply With Quote
Old 11-08-2011, 06:51 PM   #7
Newbie
 
Join Date: Nov 2011
Posts: 4
Default

Basement Bathroom Rough In Questions


Thanks for the feedback.

I have a few more specific commments/questions...

Basement Bathroom Rough In Questions-rough2-2-1.jpg

Just to confirm that joint 1 is ok to be attached near center because there is no venting going on but joint 2 needs to be more above center because it is wet venting. Did I get this right?
I do understand that everything has to slope 1/4" per foot.

Basement Bathroom Rough In Questions-rough2-4-1.jpg

Are my pipe sizes correct? I sized the lav/floor drain pipe at 2" because it is also the vent but then I sized the vent itself at 1 1/2". The smaller vwent pipe will help me out in the ceiling.

I love the 4" X 3" closet elbow with the flange inside! thanks plumber666!!!

I think I will move the shower/lav drain to connect to the horizontal pipe. It will definately help reduce depth. I just thought that the flow from the shower might help prevent clogs because the wife wants a low flow toilet.

Basement Bathroom Rough In Questions-rough2-5.jpg

I think I will need to keep the shower vent because it is near 10ft from the shower trap to the lav vent. Unfortunately my bathroom wraps around the chimney so I dont have much option to shortcut!

Will the shower drain fit inside the 2" drain pipe or do I need to accomodate for that when I re-pour the floor?

Sorry I'm an engineer and it makes me a bit obsessed with details. lol

Thanks again for the great input.
Mike Fox is offline   Reply With Quote
Old 11-08-2011, 10:42 PM   #8
Member
 
Join Date: Oct 2011
Location: Phoenix, AZ
Posts: 112
Default

Basement Bathroom Rough In Questions


What program did you use to make your sketches? Thanks.
JeepNick is offline   Reply With Quote
Old 11-09-2011, 08:39 AM   #9
Plumb or Die!
 
Join Date: Oct 2010
Location: BC, Canada
Posts: 321
Default

Basement Bathroom Rough In Questions


Remove post, try again

Last edited by plumber666; 11-09-2011 at 08:42 AM.
plumber666 is offline   Reply With Quote
Old 11-09-2011, 08:46 AM   #10
Plumb or Die!
 
Join Date: Oct 2010
Location: BC, Canada
Posts: 321
Default

Basement Bathroom Rough In Questions


All good. Shower drain pipe is a hub that fits over the pipe. I always leave a 6"x6" box out around a tub or shower before the slab is poured to make it easier to cut the pipe off, or make adjustments to the trap.
plumber666 is offline   Reply With Quote
Old 11-10-2011, 08:35 AM   #11
Newbie
 
Join Date: Nov 2011
Posts: 4
Default

Basement Bathroom Rough In Questions


Ok, Great. I guess the 6"X6" box will be full depth of the concrete. When would I fill this box in? With concrete? Once the tile is layed and the drain installed?

I made my sketches with a mechanical design software called Solidworks. I got the 3D models of the fittings on a free CD from Charrlotte Pipe and Foundry.


Thanks,

Mike Fox 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
Completing a roughed in basement bathroom Bob in St. Louis Plumbing 8 11-18-2011 12:12 PM
Basement Bathroom Pex Questions binkley Plumbing 2 09-13-2011 05:04 PM
Vent questions for basement barsink danielrg Plumbing 7 08-28-2011 02:33 PM
Yet More Basement Questions DocWard General DIY Discussions 8 06-29-2011 10:24 PM
Basement bathroom rough in........ Mills314 Plumbing 8 06-09-2011 09:22 AM




Top of Page | View New Posts

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