The first image is the sink base cabinet. The composite image below it is in the basement looking up.
So I had new cabinets and new countertops and had a deeper sink installed.
Nobody, including myself, thought to consider the location of the drain pipe. With the new sink the discharge tube of the garbage disposal is now lower than than the drain pipe coming out of the wall.
The wall is an exterior wall with a window above the sink. The drain pipe runs horizontally 3ft across to the right.
In the composite image below the cabinet image you can see on the right side where the pipe comes down and then runs overhead towards the center of the house where it connects to the main drains.
Opening up the wall means cutting into the back of two cabinets. Instead of doing that, I was wondering if I can drill straight down in the rear right side of the sink cabinet and 90 to the right, run a horizontal piece and join up to the existing drain pipe and cap off old pipe in the cabinet? All bathrooms are in the center of the house.
The kitchen sink is the only drain pipe located against an exterior wall. I went on to the roof and noticed one vent stack just before the apex of the roof. I went in the attic and I see that stack coming up out of the center of 2nd floor ceiling. Considering that there is only one vent stack on the roof, how likely is it that the sink drain does not have a vent stack of its own or is it connected to the vent stack in between floors? Thank you!