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Old 08-13-2010, 09:06 AM   #1
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Vent Length of Run?


Hello all,

I am in the planning stages of moving a basement bathroom (all the way across the basement). Was just wondering how far venting can run horizontally. Not looking forward to breaking into upstairs walls.

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Old 08-13-2010, 12:31 PM   #2
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Vent Length of Run?


It depends on your state, but you would be safe running a 2" vent up to 150 feet horizontally. Just make sure you put a slight pitch to the pipe incase any water that gets in can drain out. You have to be careful about offsets as well, you can't run a vent horizontally that drops under an obstruction such as a beam or duct, then rise again, that creates a trapped section where water can collect.

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Old 08-13-2010, 07:31 PM   #3
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Vent Length of Run?


Quote:
Originally Posted by The Engineer View Post
It depends on your state, but you would be safe running a 2" vent up to 150 feet horizontally. Just make sure you put a slight pitch to the pipe incase any water that gets in can drain out. You have to be careful about offsets as well, you can't run a vent horizontally that drops under an obstruction such as a beam or duct, then rise again, that creates a trapped section where water can collect.
You're right about different states. I can only run a 2" horizontal vent 40'
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Old 08-14-2010, 08:15 AM   #4
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Vent Length of Run?


Thanks very much, I'll check the local codes. It would be a fairly simple but long run.
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