Plumbing Forum - Professional & DIY Plumbing Forum > General Plumbing Discussion > General Plumbing Help > design help

Help Support Plumbing Forums by donating using the link above or becoming a Supporting Member.
Thread Tools Display Modes
Old 07-02-2012, 07:54 AM   #1
Junior Member
Join Date: Jul 2012
Posts: 1
Default design help

Hi All,

I'm looking for help with a rough in of a new bathroom. We've done an addition and changed an old bedroom into a bathroom. My questions are around the sewer line installation. Due to the location of the mainline I need to run a portion of pipe a long a horizontal support beam. Here are my questions:

1) The way the bathroom is setup the toilet and double sink are first and the tub and shower are across the room. Should the toilet be the last item on the 3" pipe, meaning that I need to hook the shower and bath into the 3"" line before the toilet or can I use a 3" tee wye (i think it's called that) for the toilet and a fitting that reduces the 3" down to a 2" pipe and continue on to the shower and tub?

2) I think all drainage pipes need to turn a corner with 2 x 45 degree fittings instead of a 90 degree fitting. Is this correct? Does that hold true for 3" pipes as well?

3) What is the maximum allowable distance a 2" drain pipe can be from the vent.

Thanks in advance for answering my questions.


Greg is offline  
Reply With Quote
Old 07-02-2012, 10:59 AM   #2
Senior Member
johnjh2o's Avatar
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 3,186
Liked 726 Times on 550 Posts
Likes Given: 620


It's not a question of what order the fixtures connect to the main line. It's a question as to how there vented. In most cases your not allowed to connect another fixture between a fixture and it's vent.

johnjh2o is offline  
Reply With Quote
Old 07-02-2012, 05:18 PM   #3
Easily Amused
Mr_David's Avatar
Join Date: Jan 2010
Location: Santee,Ca
Posts: 3,740
Liked 895 Times on 726 Posts
Likes Given: 593


Took me a few minutes to find but here is a link to an old thread where we helped walk another through a bathroom remodel.
You may find a lot of useful information in this thread about what not to do.
Originally Posted by AJay View Post
Go here.
. . . . . . . . . . -(@@)- . . . . . . . . .
. . . . . ----o00--()--00o----. . . . .

a.k.a. Krazedav
Mr_David is offline  
Reply With Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
System Design TheNapster87 Plumbing Building Code 7 12-20-2012 10:46 PM
Rough in design. Do you approve? Bogucki Plumbing Building Code 15 09-16-2012 01:17 AM
Layout/Design Question MrVVhite General Plumbing Help 1 03-15-2012 03:41 PM

Newest Threads