So we're remodeling our kitchen and my wife insisted we get a new farmhouse sink. We had a contractor install the new sink and after getting it put in he mentioned that the disposal line is about the same height as the drain line in the wall. Maybe the disposal line is higher than the wall line, but if it is its like millimeters higher.
He connected it up using some of those flexible tubes and said we should be good. I was a little worried about this set up, so I tested it by pouring about 3 gallons of water from a bucket (we don't have a faucet yet) down the drain and then unscrewed the black tube line from the disposal. Water was sitting in the p-trap all the way up to the top of the this black tube, but was not in the disposer itself. I'm afraid that will be a problem once the disposer starts getting used again.
I was googling around and most suggestions are to either 1. Get a shallower sink (won't happen, wife won't allow it). 2. Remove the disposal (I use it every so often so I'd prefer not to do this if I can avoid it). 3. Move the drain line in the wall down (requires plumber because I ain't doing that haha). 4. IF THIS IS EVEN EXISTS, find a disposer with a shorter neck/flange. My current disposer is a Waste Master SS2600. Its probably 19-20 years old and original to the house, but still works fine.
Or is it actually ok the way it is set up like the contractor said? I've never actually explored a p-trap before, but I know they're supposed to hold some water. Is it ok if they're completely full up to the top of the black tube from the disposer?
If its not ok, it seems my only option is #3 or #4. Based on experience what would be the average cost of moving a drain pipe down like 2-3 inches? Like no more than $500, surely?
I've attached some screenshots of the setup.
We'll the new disposal isn't much higher. MAYBE half an inch. Also the ptrap is now too close to the wall so I have to have it come off the side and have an extra elbow in there.