Rough Bathroom Sink Drain - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 03-08-2014, 08:12 PM   #1
Trucon01's Avatar
Join Date: Jan 2012
Location: Northern Virginia
Posts: 703
Rewards Points: 510

Rough bathroom sink drain

Hi All,

I'll be tying into a 2" vent for my sink drain, but have a couple questions.

How high up do I put the sanitary tee from the floor? I've seen anywhere from 18-20".

Which method is preferred / best?

a. Use a 2" x 2" sanitary tee and then a 2" to 1.5 reducer on the stub out?
b. Use a 2" x 1.5" sanitary tee and then a 1.5 to 1.25 reducer on the stub out?

The attached picture is not mine, but my set up will be exactly the same.
Attached Thumbnails
Rough bathroom sink drain-2249801244_e4a3c25e40.jpg  


Basement Demo started Jan 2012: View my basement progression!!!

Bathroom demo started Feb 2013: View my bathroom progression!!!
Trucon01 is offline   Reply With Quote
Old 03-08-2014, 08:54 PM   #2
Join Date: Apr 2007
Posts: 558
Rewards Points: 500

1) If there's going to be a vanity/cabinet base, then it's six of one and half dozen of the other. If it's a pedestal or console sink, then follow the rough-in specs that come with the sink.

When I was an apprentice, the master I worked for wanted them all at 18". I tend to put them in a little higher now because more and more cabinets seem to have a drawer on the bottom which pushes the "floor" inside the cabinet up a few more inches.

2) Use a 2" x 1-1/2" Tee off the vent. Stub out in 1-1/2"; your trap should also be 1-1/2". Use an 1-1/2" x 1-1/4" Trap Adaptor to connect the tailpiece to the trap.


Ishmael is offline   Reply With Quote
The Following User Says Thank You to Ishmael For This Useful Post:
TheEplumber (03-08-2014)
Old 03-08-2014, 09:12 PM   #3
TheEplumber's Avatar
Join Date: Jul 2010
Location: North Idaho
Posts: 9,915
Rewards Points: 796

Pretty much the same for me.
20" above the floor works great on standard vanities. For 36" tops it'll take a tailpiece extension but that's no big deal
Waters I put 2" above the waste, @ 6" or 8" spread
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is offline   Reply With Quote
Old 03-09-2014, 09:42 AM   #4
A "Handy Husband"
rjniles's Avatar
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 7,505
Rewards Points: 4,226

If that 2" vertical pipe you are tying into is truly a vent for fixtures on a lower floor, you should not be using it as a drain.
Coastal South Carolina
rjniles 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Removing bathroom sink drain plug (glued abs p-trap) ? westbank Plumbing 11 09-06-2013 03:03 PM
Running water does not go down in upstairs bathroom sink :( dnharp Plumbing 3 02-17-2013 04:37 PM
Bathroom sink drain pipe on the side of the wall amandanory Plumbing 7 11-17-2012 10:27 PM
Seeking help with clogged bathroom sink drain dwlodyka Plumbing 20 03-14-2012 10:36 AM
Double Bowl Kitchen Sink Drainage Problem PeteW Plumbing 16 09-05-2011 09:41 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1