How to Plumb a Double-Sink Disposal (plumbing101.i234.me) Question I am installing an InSinkErator Badger 5 (1/2 hp) under a double sink. There is no dishwasher. The disposal outlet lines up with the horizontal pipe that feeds a tee, then a single P-trap, then the wall drain. The manual mentions two traps. The disposal also features… Continue reading How to Plumb a Double-Sink Disposal