Bathtub p trap size

gildomiloJune 21, 2010

Can you install a 1 1/4" p trap on a bath tub? It would tie directly into a 1 1/2" drain pipe. There's not too much room in the 7" joist bay to tie in a 1 1/2" trap, and be able to take it out if there's a problem.

Thanks,

Gil

Thank you for reporting this comment. Undo
lazypup

Code requires an 1-1/2 trap on a tub. You may increase to 2" but you may not reduce below 1-1/2".

    Bookmark   June 23, 2010 at 4:47PM
Thank you for reporting this comment. Undo
davidro1

gildomilo, are you using copper pipe? If not, are you aware that its outside diameter is smaller than the other kinds of pipe. Also, are you aware of Street elbows? They take less space than regular elbows. There is more to share. Post again, describing why 7" is not enough. I hope you can fit a 1.5" trap in there.

    Bookmark   June 23, 2010 at 5:58PM
Thank you for reporting this comment. Undo
gildomilo

I fit the 1 1/2 in, the drainage and overflow had to be cocked a little to the side in order to fit. The problem is where the shower vent line had to go and the framing in the bathroom. It's in, now I just need to seal up the waste and overflow.

    Bookmark   June 25, 2010 at 9:06PM
Thank you for reporting this comment. Undo
lazypup

I am curious as to how you connected the shower vent?

    Bookmark   June 25, 2010 at 10:43PM
Thank you for reporting this comment. Undo
gildomilo

Just down stream from the trap, maybe 2" is a sanitary tee the vent comes off of that and goes up, the rest of the drain continues along the path to the stack. The tub is only 30" wide, and the framing is very tight. In looking at the framing I probably could have pulled on of the 2X's out and gotten enough room for the drain to go straight. I might do that today, but I hate to as I have the tub and everything else set.

    Bookmark   June 26, 2010 at 8:00AM
Thank you for reporting this comment. Undo
gildomilo

I decided to fix it the proper way and take the old framing member out. So much for the bath I took yesterday :)

    Bookmark   June 26, 2010 at 8:41AM
Sign Up to comment
More Discussions
Water Softener - Help with Proper System Selection
Hello, I decided to put in a water softener system...
badsha
New Water Softener problem (Fleck 5000 ProFloSXT)
Hello, I recently moved into a home that uses well...
djt511
Costco Water Ridge Dual Flush -- Need reviews
Any more reviews on the dual flush Water Ridge toilet?...
smudgecat99
Fleck 9100 SXT Programming/Settings
I am finally installing my new Fleck 9100 SXT!!! Thanks...
rss1978
Improving water pressure to outside spigot
I would like to improve the pressure and flow rate...
greasetrap
Sponsored Products
67" Dorset Bateau Cast Iron Skirted Tub
Signature Hardware
Autumn Stone Veneer Beverage Tub
$229.00 | FRONTGATE
Designer Wall Mount Brass Bathtub Faucet Shower Mixer & Handheld Kit
Hudson Reed
Flat Weeper/Soaker Hose
$24.50 | FRONTGATE
Atlantis One-Light Bath Fixture
$208.00 | Bellacor
Marion Standard Shower Stool - Off-White
Signature Hardware
Meditub 26x53 Left Drain Biscuit Soaking Walk-In Bathtub
Beyond Stores
Modern Minimalist Freestanding Floor Mount Tub Spout Filler Faucet
Hudson Reed
© 2015 Houzz Inc. Houzz® The new way to design your home™