Re: roof vents
Posted by Dale's Plumbing Service LMP on January 18, 19100 at 21:10:58:
In response to Re: roof vents
: Recently the vent in my attic became blocked with snow cyrstal or ice
: , this caused a negative air pressure and sucked the water out of the traps cuasing
: gases to eneter in to the house hold. Why did the pipe block up with snow cystals, does it have to be vertical , i how i prevent this next time .regards

Alix, the mim size of this pipe should be 3" and should not decrease in size to 1 ft below the roof. This should be a vertical vent.If it continues to do this in extreamly cold times i would put a heat tape around it. I'm sure you do not want to increase this to 4" or larger but then again that would help also.Dale's Plumbing Service LMP

Replies to this post
There are none.