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  #1  
Old 9/10/12, 9:54 AM
J Michael J. Sedillo J Michael J. Sedillo is offline
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Default Roof vent caps

Is there a size (diameter) of roof vent pipe that requires a (rain) cap?

Oftentimes a sink or toilet vent pipe will be 4" or more.

When does a roof vent pipe require a cap?

Mike
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Old 9/10/12, 10:24 AM
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Bob Elliott Bob Elliott is offline
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Default Re: Roof vent caps

Attic vents need caps and plumbing vents do not.

Keep studying and it will all click.
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Old 9/10/12, 11:31 AM
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Jeffrey R. Jonas Jeffrey R. Jonas is offline
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Default Re: Roof vent caps

Quote:
Originally Posted by jsedillo View Post
Is there a size (diameter) of roof vent pipe that requires a (rain) cap?

Oftentimes a sink or toilet vent pipe will be 4" or more.

When does a roof vent pipe require a cap?

Mike
Mike,

Generally speaking, all roof penetrations need a cap EXCEPT plumbing. All plumbing vents (should) go to sewer/septic. Follow the vent pipe down... where does it go?

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Old 9/12/12, 12:26 PM
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Kenton Shepard, CMI Kenton Shepard, CMI is offline
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Default Re: Roof vent caps

White PVC exhaust and supply for high efficiency boilers and furnaces don't need them. The supply is usually turned downward though.




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