Vent stack reduction

Specific Inspection Topics Plumbing Inspections
1

Is this vent stack reduction OK?

Thanks,

Ken

DSCF1364a.jpg
DSCF1364a.jpg600×800 52.1 KB

2

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

3

Thanks so much Roy!

Ken

4

Yep, just as Roy stated.