Toilet Inlet fitting gasket

[dhull]

Changing out a Thetford style II toilet. At the water Inlet from camper the fitting has a rubber gasket inside it. Tried picking it out but it does want to pop out. It's a little deformed and previously leaked until tightened.

So I'm wondering if it should pop out and I can replace it. Or is it built in to the fitting?
Is this the PEX stuff?

[dhull]

Did get it out.
Thanks!

[ScottG]

Yes, it will pop out and you can get a replacement at HomeDepot like the part Mr. Wolfe shows above.

[wolfe10]

Could be a common RV washer: https://parts.unitedrv.com/products/1-2p-cone-washer

The little tabs keep it in place/a little more difficult to remove.

Any RV shop will have them.

[QCMan]

Most fittings will leak until tightened. Clean it and tighten it so it does not leak. They are fairly resilient.