Vent stack reduction

[Ken Peckham]

Is this vent stack reduction OK?

Thanks,

Ken

[Roy D. Cooke, Sr]

Originally Posted by kpeckham

Is this vent stack reduction OK?

Thanks,

Ken

Not reduction they have increased the size, reason is because in Cold weather the moist vent air could close a 1 1/2 or 2 inch stack .
So it is required to be 3 inch so the frost can not close the vent . Many older ones I see are still 1 1/4 or 1 1/2 and have been this way for 50+ years . No big deal

[Ken Peckham]

Thanks so much Roy!

Ken

[Jeffrey R. Jonas]

Yep, just as Roy stated.