Does vent have to have a pitch?

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Old 05-06-03, 10:25 AM
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Does vent have to have a pitch?

When running horizontally do vent pipes have to have a pitch? If yes, how much?
 
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Old 05-06-03, 12:09 PM
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Cool

If it is vented through the roof and catches rain or snow, I would pitch it 1/4" per linear foot back toward the main drain.
I don't know if this is code since I'm not a pro plumber, but that would let it drain like any other drain pipe.
If it's not subject to collecting rain or snow, I wouldn't think that there would be any reason to slope it.
Mike
 
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Old 05-06-03, 05:00 PM
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Generally, the vent should grade as OldGuy said... There are a few exceptions, but I doubt you fall under those exceptions at this point... Why wouldn't you grade the vent anyway? What is the situation?
 
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Old 05-06-03, 08:06 PM
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I need to run a new vent for three fixtures and a sewage ejector. All fixtures vents will firs go straight up and then horizontally like back vents to the single vent stack that in turn will go vertically up through the roof out. So my question is do horizontal portion of fixtures vents have to be pitched?
 
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Old 05-07-03, 08:18 AM
Brewbeer
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yes.
 
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