Seems to me that IF there is a trap beneath the floor at “B”, excessive water velocity might siphon water out of that trap. That’s just speculation. Anyone know of a defect for sure?
Trap can’t be more than 2’ below the fixture, except for a laundry dain, as I recall.
You got it Joe, found it in a couple of different places.
A= S-trap.
![245_double_sink_hook-up[1].JPG](https://global.discourse-cdn.com/internachi/original/3X/c/0/c065852e1fe53f102b8ad4c1162aa09447635aaf.jpeg)
Isn’t “B” a support leg for the sink? I see an S-trap on a wet vent.
Looks like a drum trap at the bottom.
I’ve never seen a drum trap that looked like that (B). All the drum traps I’ve seen have been under the floor on tubs.
The photo label said it’s a double sink, but I didn’t inspect the house.
What exactly are you calling “B”? All I see is an adjustable sink support leg.
You guys are killing me here 
I agree Brad! A frigguin’ support leg!
Get with it guys! Man! the inspectors that are being pumped out lately.
Can’t tell a support from a friggin drain! Dammit!
I was told it was a double sink but it’s not. You’re right. You can see the tip of the other support leg in the lower left corner. Hahahahahah… Yee hah.
Thank you ! You were killin Brad and I. LOL!
Too much tequila huh?