Will this separate pipe for dishwasher cause sewer gases to enter into cabinet and dishwasher to get wet dog smell? The separate dishwasher pipe design - at top of pipe is a 2” Wye fitting - one side is open and other side dishwasher drain hose goes into it, the wye is connected to a straight pipe, then a p-trap (glued on), then a pipe connecting into drain / waste line (same drain line the sink connects to above it). The corrugated dishwasher hose goes diagonal to straight pipe and is zip tied (little bit of flat) and then up to wye opening (not a smooth high loop).
If so, how do I correct problem? can I cut off Wye and cap pipe, connect dishwasher to Insinkator with high loop inside cabinet - note sink and insinkator have Oatey aav (dfu 20) for vent? Have a similar setup with a basement bar sink but no garbage disposal. Been trying to determine where sewer gas (methane) is coming from. Put clear p traps on today to see if aav (put new one a few days ago) are working or high winds drawing down p traps. Have water softener, well water has been tested, septic tank cleaned last year, raised roof stacks foot and put candy cane with 3/8” drilled hole caps, ran garden hose down every roof stack, recaulked all toilets. Plumber that designed n installed long gone and was approved by county so please no comments just solutions.