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Old 05-04-2012, 09:58 PM   #1
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Venting basement bathroom with lift station.


I have a roughed in basement bathroom. The shower, toilet, and sink all drain into a sealed lift station. All drains are pretty close to the lift station. Toilet 2 feet, shower 3 feet, and sink drain about 8 feet. What would be required as far as venting. There is currently a 2 inch vent coming out of the top of the lift station that I would assume goes all the way to the roof.

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Old 05-04-2012, 10:40 PM   #2
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Venting basement bathroom with lift station.


without seeing it, i would say if anything the sink maybe or the use of a.a.v.

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Old 05-04-2012, 10:42 PM   #3
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Venting basement bathroom with lift station.


It sounds like your vent is off the lift. It probably ties in to another vent before going through the roof.
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Old 05-04-2012, 10:46 PM   #4
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Venting basement bathroom with lift station.


Typically, you vent it with a 2" vent through the roof on a dedicated vent. If not possible- tie it into another properly sized vent. Do not use a AAV as they are a directional, one way type of vent. A sump needs to draw air as well as displace air.
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Old 05-05-2012, 11:17 AM   #5
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Venting basement bathroom with lift station.


They stubbed a 2" vent off the shower drain that comes up through the concrete. The only existing vent to the roof is the 2" that comes out of the lift station. I don't suppose using that is an option or is it? Example tie the existing shower vent into this lift station vent. Then also T off behind the vanity and run a vent up from there also to tie into the lift station vent.

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Old 05-05-2012, 11:45 AM   #6
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Venting basement bathroom with lift station.


yes all vents can be tied together
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Old 05-05-2012, 11:50 AM   #7
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Venting basement bathroom with lift station.


Quote:
Originally Posted by jaydevries View Post
yes all vents can be tied together
As long as the point at which you tie into has no drains above it, if so, the tie-in point would have to be above the flood plain of the fixture being drained.

Mark

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