[Dhead]

I'm getting a little frustrated on this one. We aren't going anywhere this summer, so I've got lots of time. About 6 weeks ago I noticed a diesel leak under the coach. It was leaking on the exhaust crossover. I took some pictures and we kept getting higher up, following the leak. Last week we identified the culprit - a leak in the return line. There is a return filter on the side of the C15, above and foot back from the starter. They started with a black braided hose (about 2.5 ft) - just about getting past everything then they had some fittings that changed the braided line to end with a push-on with 5/8" green plastic hose. Reaching under that found the leak (about a drop every 10 seconds). Doesn't sound like much, until it does it for weeks...
We were already surprised by the push on fitting and we got more surprised when it was an air fitting. I doubt much that the o-rings were viton. I talked to Newell parts and know one knows anything. I definitely don't want to go back to a push on air fitting. Tomorrow I will call Service. Every Newell has a return line. so somebody should have some ideas. Its low pressure too...
I'm leaning toward a 1/2" ID barb to a 1/2" NPT male fitting. 316 SS, It is good for diesel and I can put one or two worm drive clamps. McMaster-Carr 53505K73 appears to be close.
I've had no luck finding a 5/8" compression fitting with a 1/2" NPT male end that is built for a 5/8" hard hose for diesel, or a push-on for that matter.