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Old 11-13-2011, 07:10 PM   #1
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Elbow w/ Low Heel Inlet to combine toilet & tub drains


I've read the plumbing code until I'm crosseyed and I'm not seeing anything specifically addressing this...

Can I use a 3x3x2 90 degree Elbow with Low Heel Inlet to combine toilet and bath tub drains?

I can not vent the tub independently without roof penetration. Trying to avoid that...

This is what I'm considering:

tub==(2" x 36")==inlet elbow w/toilet==(3" x 48")==(2" vent)==

This 2" vent is not a stack vent but I was hoping it would be okay to wet vent the lavatory into it.

This 1 small bathroom is the only plumbing on the 2nd floor. 1st floor fixtures vent separately.

Any help would be appreciated,
Thanks.

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Old 11-13-2011, 08:15 PM   #2
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Elbow w/ Low Heel Inlet to combine toilet & tub drains


Of course...right after I post that, I find it prohibited in the code...

706.4 Heel- or side-inlet quarter bends. Heel-inlet quarter bends shall be an acceptable means of connection, except where the quarter bend serves a water closet. A low-heel inlet shall not be used as a wet-vented connection. Side-inlet quarter bends shall be an acceptable means of connection for drainage, wet venting and stack venting arrangements.


So...could I use a 3x3x2" wye and join the tub into the side of the 3" pipe that serves the toilet?

Please excuse this horrible drawing..


[ tub ] ====(2"x48")====\\
[ WC elbow ] ==(3")== [ wye ] ==(3" x 36")== [tee w/ 2" vent] ==(3"-out)===

Thanks...

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Old 11-14-2011, 09:37 AM   #3
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Elbow w/ Low Heel Inlet to combine toilet & tub drains


That's one bad drawing. Is there a sink in this bathroom you can wet vent with?
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Old 11-14-2011, 05:20 PM   #4
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Elbow w/ Low Heel Inlet to combine toilet & tub drains


Yeah I was hoping to wet vent the sink into the 2" vent in my "drawing".

Here, I attached something a little better...

It's not clear from the drawing but the 3x3x2 wye would be approximately horizontal... (Rotated slightly for drainage slope from the tub)

I'm open to ideas for rearranging the toilet and lav if it means I can do something else. I really don't want to move the vent if I can avoid it.

Thanks :-)
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Old 11-15-2011, 04:19 PM   #5
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Elbow w/ Low Heel Inlet to combine toilet & tub drains


Just move the lav drain to tie into the pipe for the tub/shower, and you're all wet vented up. Or move the tub/shower drain to the lav drain. Either way you're good to go.
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Old 11-15-2011, 05:11 PM   #6
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Elbow w/ Low Heel Inlet to combine toilet & tub drains


So what you're saying is I can't combine draining the lav into the vent and wet venting the tub? (I'm not sure I'm using the term "wet vent" correctly here...)

Quote:
Just move the lav drain to tie into the pipe for the tub/shower, and you're all wet vented up.
Could I tie the lav drain directly into the 3" pipe? (another 3x3x2?)

Quote:
Or move the tub/shower drain to the lav drain.
There isn't enough clearance under the floor to add another tee and have correct slope from the tub/shower to the vertical vent pipe...

Thanks for your help.

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