My question is where to install a P trap on this configuration (Disposal is directly over the drain pipe). We are on conventional foundation, so is installing P trap under the house an option? We went from a double sink to a single deeper sink and there was only 6 inches of clearance so I took a chance with no P trap….bad idea. Sewer gas now coming in regularly. Any help with details and illustrations from a plumber would be much appreciated. Thanks!
Max
Best Answer
You're going to have to put a trap in there somewhere. If there's enough space in the cabinet, you could do something similar to this...
NOTE:: All horizontal pipe sloped at 1/4" per foot.*
If not, and you have access to the plumbing below. You could reroute the plumbing, so the it comes up the back wall instead.