[David and Teresa]

        I have a large air leak coming from this. I'm not quite sure what the real name is, but it's between the supply air line and the 6-pack in the engine compartment. It's not the original but one replaced on the road 9 years ago. I need to source one from somewhere.

[MrE]

Amazon has a decent selection water separators.

[Bonanza Bob]

Amazon has a decent selection water separators.

I just replaced one on my coach and got it from Newell.  Suggest you call them.

[77newell]

I think Lowes and Home Depot have them as well.

[Richard]

Never found any water in mine, and after replacing three, I simply took it out.

[David and Teresa]

Never found any water in mine, and after replacing three, I simply took it out.

I've never had water in there as well. Do you still have a gauge there?

[Richard]

Yes, put in a Tee in place of the separator.

[77newell]

It is strange that there is a filter/dryer for the rear 6-pack and not for the front 6-pack. And there didn't seem to be any difference in the rate of problems front to back. However, once I took it out I had new problems with the rear suspension. Coincidence? Beats me. But I have wondered if it's possible that its function isn't more as a filter than a drier.

Since I changed to the desiccant type drier for the overall coach air system I have not found water anywhere so I doubt water is a problem to worry about. That does not preclude dirt remaining a potential problem and if it is then an inline filter of some kind that doesn't carry the leak risks of the dryer type gadget would be worth considering. If I were to install one at the rear 6-pack it would make sense to install one up front as well.