ddec 3-4 12.7 whistle while under load when building air.

Sorry, I guess I was a little confusing. I suggested it's the compressor outlet hose. The one that needs to be braided. Somebody else suggested it's the compressor supply line. But that couldn't be it as it doesn't do it when the compressors unloaded. He took exception to what I originally suggested because the whistle changes with boost. My last post I was saying that the compressor output should vary based on boost, so that doesn't rule out the compressor output line.

 

I understood and agree with that. Thanking on down the line could be the dryer or line to wet tank? Just open discussion to a very odd problem. Hope I did not offend you.

 

Offended? No. I felt that I hadn't been clear. So I wanted to make it better.