I ran across this today and never saw it before. It appears to be an Air Admittance Valve(??) installed on the end of a vent stack. Anyone have info on if this is a proper installation? Thanks
What is that link supposed to tell me?
I doubt it’s actually an AAV. It looks like a cap of sorts, but I’m not sure why it’s there.
Installing an AAV in such a manner would completely defeat the purpose for having an AAV to begin with. . .
I have recently started seeing these here on maui. They are always on homes with a septic tank and typically high wind areas although no has a good explaination for them. I though maybe to prevent back pressure on traps?
Mark Thorman
Thorman Home Inspections
www.mauihomeinspections.com
Never seen one used that way. If there are high winds in the area the some plumbers put a hook - upside down trap to keep the wind from blowing the traps in the house.
I thought it was a Maui thing. Things get done a little differently here.
Mark Thorman
Thorman Home Inspections
www.mauihomeinspections.com
Thanks for the responses. It kinda stumped me too. The installation is on a home without a septic but it is in St. Augustine, Fl. Maybe the high wind theory is the reason, but it’s only installed on one vent.