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Old 12-10-2011, 08:41 PM   #1
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Boring studs for Sink drain


Prefabing partition walls for my basement project,one of the jobs I wish to do is to prebore the studs for the lavatory sink drain before I assemble and erect the wall.

My question is,does there exist a rule of thumb for height of holes in studs in relation to height of the bottom of the sink.

Should it be 2 inches,4 inches,or a different number lower than the sink bottom?

I know I must pitch the holes 1/4 inch every 4 feet for proper drainage.

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Old 12-10-2011, 09:12 PM   #2
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Boring studs for Sink drain


id say to rough in the center of pipe in the neighborhood of 17" where it turns out of wall .
depending on how far you are from the stack youre tying into 1/8"-1/4" per foot would be a much better number to aim for.
id drill the holes after wall is up,much easier to line things up that way.
dont forget the holes for vent line higher than level of sink

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Old 12-10-2011, 09:19 PM   #3
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Boring studs for Sink drain


18" inches from floor board is my rule of thumb is where i put my stub-out/hold rite but may differ by lave you just want the lines to reach from angle stop to faucet. also i go 1" every 4 ft "just to be safe"

(and remember hot is always on the left

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Old 12-10-2011, 09:25 PM   #4
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Boring studs for Sink drain


Quote:
Originally Posted by spring3100 View Post
Prefabing partition walls for my basement project,one of the jobs I wish to do is to prebore the studs for the lavatory sink drain before I assemble and erect the wall.

My question is,does there exist a rule of thumb for height of holes in studs in relation to height of the bottom of the sink.

Should it be 2 inches,4 inches,or a different number lower than the sink bottom?

I know I must pitch the holes 1/4 inch every 4 feet for proper drainage.
I would drill holes after the wall is built vanity drains can be 17-19" off finish floor to center of outlet.
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Old 12-10-2011, 09:47 PM   #5
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Boring studs for Sink drain


Thanks for you prompt replies.

FYI,this drain run will be about 4 ft,then it will 90 and run about three or four feet into a Saniflo tank.

I will put a cleanout connection on the 90,and either an AAV or connect to the common vent.

I will post pictures as the project progresses.

Happy Holidays to all.
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