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Double fixture tee or double sanitary tee?

Asked Aug 6, 2008, 06:45 PM — 14 Answers
For DWV on a single vanity to double vanity conversion. Which to use?

Double sanitary:
http://images.grainger.com/images/pr...MALL-1WHU8.JPG

Double fixture:
http://images.grainger.com/images/products/1CNT8.JPG

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14 Answers
truck 41's Avatar
truck 41 Posts: 221, Reputation: 100
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#2

Aug 6, 2008, 08:26 PM
Hello, the double fixture tee is what you want to use.
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Milo Dolezal's Avatar
Milo Dolezal Posts: 5,879, Reputation: 1933
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#3

Aug 6, 2008, 10:30 PM


In my area, our Code mandates use of cross sanitary T as shown in photo #1.

As far as dimensions go, you cas use 2"x 2" x 1 1/2" x 1 1/2" Tee, meaning drain and vent are 2" and horizontal drains arms leading to your sinks will be 1 1/2".
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nc8861's Avatar
nc8861 Posts: 32, Reputation: 1
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#4

Aug 7, 2008, 05:31 AM
Hmmm....conflicting opinions. Sounds like either may be ok?
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speedball1's Avatar
speedball1 Posts: 27,655, Reputation: 9541
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#5

Aug 7, 2008, 05:46 AM


Quote:
For DWV on a single vanity to double vanity conversion. Which to use?
I'm wondering! Are you planing on installing back to back lavatories like in separate bathrooms or are you wanting to install side by side, his and hers bowls? Let me know. Tom
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nc8861's Avatar
nc8861 Posts: 32, Reputation: 1
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#6

Aug 7, 2008, 06:05 AM
Side by side, his & her sinks.
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speedball1's Avatar
speedball1 Posts: 27,655, Reputation: 9541
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#7

Aug 7, 2008, 06:21 AM


Quote:
Originally Posted by nc8861
Side by side, his & her sinks.
Ahhh! Then neither fitting would be used. Both Milo and Truck figured on a back to back installation. I did too at first, the fittings through us off.
You have options here. 1) you can come off the stubout with a wye and pick up both tubs with their own traps **or** 2) you may use either a center outlet or a end outlet continuous waste, (see images) and pick both up with a single trap. By the way, those two fittings are called a "Double Sanitary Tee" and a Double Combination Wye and Eighth bend. Good luck, Tom
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nc8861's Avatar
nc8861 Posts: 32, Reputation: 1
Junior Member
  
#8

Aug 7, 2008, 06:25 AM
Huh? I'm confused now.

I don't think I can do #2 (if I'm understanding what you mean) because the new vanity has center drawer supports. I don't understand #1.

I was hoping to do something like this one that I found over at the Terry Love forums....
http://www.terrylove.com/forums/atta...1&d=1218029214

....and you didn't attach any images.
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Milo Dolezal's Avatar
Milo Dolezal Posts: 5,879, Reputation: 1933
Plumbing Expert
  
#9

Aug 7, 2008, 06:37 AM
The photo in Terry Love forum is exactly how it should be done: nice and clean job. I cannot which cross T he used but in my area we would use Cross San T for this installation
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speedball1's Avatar
speedball1 Posts: 27,655, Reputation: 9541
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#10

Aug 7, 2008, 06:42 AM
OK! Now it becomes clearer. Most his and hers lavatories are close in side by side and a continuous waste is called for. If the vanities are to be in a wider spread, such as shown, then a double sanatary tee should be used to pick them up. You don't see the continuous wastes I put up in my last post? They're on the bottom left. Sorry for the confusion. Tom
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