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Old 11-24-2015, 06:56 AM   #1
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floor drain trap venting?


Hi,
Just pouring slab for a garage and setting up two floor drains. They are all-in one units with traps and back water valve built into drains. They will run to just outside my slab and dump into a below grade pit or french drain. Do I also need to run a vent line for trap venting?
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Old 11-24-2015, 08:03 AM   #2
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For the floor drain? The air is already there.
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Old 11-24-2015, 08:15 AM   #3
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And there's no sewer gas to vent.
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Old 11-24-2015, 06:07 PM   #4
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A floor drain is just a bigger trap guys. Yes they do need to be vented. In his case they do not since they do not tie into the poop sewer.
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