Originally Posted By: rking This post was automatically imported from our archived forum.
Is it just my eyes or the angle of the picture that makes the connection between the two sinks look like it is sloped backwards (toward the left of the picture)???
If it does have even a slight slope backwards that is a potential problem waiting to happen.
And up here in Ontario, automatic vents are not permitted in any application, so I would have to write that up as "improper venting termination. I recommend a qualified contractor to investigate further"
-- Muskoka Home Inspections
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Originally Posted By: rpalac This post was automatically imported from our archived forum.
Here in the states there is a movement for all municipalities to adopt the International code. The air admittance valve is acceptable under that code. However, I believe it must be higher than the flood plain level. Any comments please.
(and yes...I thought that the drain was tilted the wrong direction and then did a double take to see if it was the picture ....it appears to have a negative fall.)
Originally Posted By: jpeck This post was automatically imported from our archived forum.
The AAVs that I’ve seen are required to be 4" above the weir of the trap, and that looks too low.
The horizontal line does look reverse sloped to me too.
The dishwasher drain line also does not (at least it is not likely to, based on the photo) have a high loop over the dishwasher as most require, thus, any backing up in the drain will likely backup into the dishwasher.
The dishwasher should also either enter through the side of a vertical tail piece (they make fittings just for that) or through a wye (not a sanitary tee) in the horizontal line, and the existing sanitary tee in the horizontal line should be a wye. Sanitary tees are made for use in vertical pipes, like the right one.
Originally Posted By: lwilliams This post was automatically imported from our archived forum.
Thank you for your feedback All, yes the drain pipe is sloping the wrong way, confirmed with a level. I also was under the impression the pipe for the dishwasher needs to be above the drain from the sink. I am still learning tech terms. You have all confirmed my thoughts “it ain’t quite right”.
Originally Posted By: roconnor This post was automatically imported from our archived forum.
RP ? your right that the IRC (P3104 & P3114) allows an AAV for individual fixture or stack vents, as long as there is at least one main vent thru the roof. Also the individual AAV should be 4? above a branch drain, but needs to be 6? above the flood level rim for stack venting (P3114.4).
I?m assuming that AAV is on a branch vent that ties into a separate main stack vent somewhere below. Otherwise it would have to be 6? above the flood level of the highest fixture.
Good eyes Jerry ? I prob wouldn?t have noticed that tee used where it should be a Wye ? 
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