Got a leaking drain at the back end of the P-trap.
When I pulled the PVC trap apart, there was no washer. Also, the male 90 pipe has flanges that keep the metal nut on the pipe. Haven't seen this type of joint before. Those flanges will defeat the standard PVC joint washer.
How can I stop this leak?
Here are 4 photos of the drain setup with a close up of the strange 90 & its nut & flanges.
Kitchen Drain From Disposer
Loosened Nut At Back Of P Trap - No Washer
Male 90 That Slips Into Back Of P-Trap