Leak outside kitchen drain - Vibe 315bhk

[Boondockin]

Anyone else have the drain leak at the horizontal end of the 90 degree elbow under the outside kitchen sink? This is on the sink's that pull out on a drawer, and have some water-less trap, so there is no P but a screen and gate of some type.

Does anyone have any idea where to purchase a replacement trap of this type? I've built bathrooms but never noticed this type of plumbing part at my local hardware store.

For reference, this drain has a 90 degree turn out the bottom of the sink, a horizontal run, which I think has a water-less trap. Then a flexible hose to connect to the trailer that goes to the gray water. on a drawer that slides out of the trailer.

One time the sink was used w/o pulling the drawer out, and water leaked across the entire floor. I noticed it right away and prevented any damage, but this could end bad.

[Boondockin]

OK, I don't have a good picture, but mine looks very much like this one:


https://www.amazon.com/HEPVO-BV1BUA1...dp/B004A2YFG4/

It looks like these are available in both 1-1/4 and 1-1/2.

So I guess a better question is, does anyone know exactly which one to purchase to replace this connection?

My leak is between the 90 and the horizontal part, the horizontal one with the ridges that could be finger grips, in the picture at the link above.