Merging Plumbing Lines Into Main? - 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 09-17-2012, 01:01 AM   #1
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,650
Rewards Points: 2,614
Default

Merging Plumbing lines into Main?


Are there rules as to how many fixtures can be on a certain size DWS line before it joins into the main line?

Specifically.....I'm in the final stages of my upstairs plumbing....I have 1 shower, 1 bathtub and 2 sinks that have to make their way down to the main line down below....

The sinks are easy (at least I think they are).... both sinks 1 1/2" lines to a single 2" line that goes down to my 3" main line.

But...the shower and tub....can I tie both of the 2" lines together into one 2" line down to my 3"?

Advertisement

__________________
Even if you are on the right track, you will still get run over if you just sit there.

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   Reply With Quote
Old 09-17-2012, 01:23 AM   #2
Member
 
Join Date: Jan 2012
Location: ohio
Posts: 1,122
Rewards Points: 552
Default

Merging Plumbing lines into Main?


here are some sizing charts
http://publicecodes.cyberregs.com/ic...2_7_sec009.htm

Advertisement

__________________
"be careful at listening to just one persons advise" said me
"be careful at listening to just one persons advise" said myself
p.s. not all i say is a fact but not all i say is my opinion.
jaydevries is offline   Reply With Quote
Old 09-17-2012, 09:38 AM   #3
Plumber/Contractor
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 7,251
Rewards Points: 2,620
Default

Merging Plumbing lines into Main?


Quote:
Originally Posted by ddawg16 View Post
Are there rules as to how many fixtures can be on a certain size DWS line before it joins into the main line?

Specifically.....I'm in the final stages of my upstairs plumbing....I have 1 shower, 1 bathtub and 2 sinks that have to make their way down to the main line down below....

The sinks are easy (at least I think they are).... both sinks 1 1/2" lines to a single 2" line that goes down to my 3" main line.

But...the shower and tub....can I tie both of the 2" lines together into one 2" line down to my 3"?
I believe you're UPC, so yes a 2" will work
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote
Old 09-18-2012, 01:29 AM   #4
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,650
Rewards Points: 2,614
Default

Merging Plumbing lines into Main?


Quote:
Originally Posted by TheEplumber View Post
I believe you're UPC, so yes a 2" will work
Confirm....I can run both the shower and bathtub 2" lines together into a single 2" and then down to my 3"?
__________________
Even if you are on the right track, you will still get run over if you just sit there.

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   Reply With Quote
Old 09-18-2012, 09:56 AM   #5
Plumber/Contractor
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 7,251
Rewards Points: 2,620
Default

Merging Plumbing lines into Main?


Quote:
Originally Posted by ddawg16 View Post
Confirm....I can run both the shower and bathtub 2" lines together into a single 2" and then down to my 3"?
Yes, 8 DFU's are allowed on a hor. 2"
shower-2
lav. 1
tub/shower combo-2

You have 6 on your lines if I accounted for all your fixtures
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote
Old 09-18-2012, 10:05 AM   #6
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,762
Rewards Points: 2,024
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Merging Plumbing lines into Main?


Bathtub only needs to be 1-1/2" unless you have an extra long trap arm for some reason.
3-1/2 Feet for 1-1/2"
5 Feet for 2"

2" is still fine though if that's the way you have already done it.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 09-18-2012, 11:13 AM   #7
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,650
Rewards Points: 2,614
Default

Merging Plumbing lines into Main?


Thanks guys....

I haven't plumbed it yet....this is my upstairs....I didn't want to start drilling holes in my floor until I knew for sure how the lines were going to run.

It will be a lot easier to tap in just one 2" into my main 3" vs 2 or 3 lines.....

Advertisement

__________________
Even if you are on the right track, you will still get run over if you just sit there.

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is online now   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
building a main and sub panels for 2 remote buildings n175h Electrical 30 12-20-2011 03:09 PM
main burner goes out after furnace running 10 -2 0 mins marion60 HVAC 4 11-02-2011 10:53 AM
Plumbing line in exterior concrete for pool Hawk334 Plumbing 4 07-04-2009 11:13 PM
Need to re-route plumbing in kitchen - advice needed capslock Plumbing 1 04-03-2008 04:22 PM
Connecting new plumbing into existing plumbing Just do it guy Plumbing 2 02-18-2008 10:36 PM




Top of Page | View New Posts