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Old 02-24-2012, 03:36 PM   #1
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Kitchen vents

My son is building a new home and is now at the plumbing. For evey sink, tub etc., does he need a single vent for each or can he join three together under the floor and put in one vent to the roof for three of them?


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Old 02-24-2012, 05:39 PM   #2
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He can join them together and tie them into the main stack or run a new vent threw the roof. He must be careful to use the correct size based on the number of fixtures the vent is servicing.

Can't join below the floor. Vents can't go horizontal until they are above the flood plain of the fixtures they are serving.

Is your son building the house himself or having a contractor do this?



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Old 02-24-2012, 09:54 PM   #3
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He can do them in groups; bathroom, kitchen, and laundry for both the drains & the vents. OK to tie the drains below the floor but vents must join above the flood level rim of the highest fixture in that group.
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