Keystone 390 water system
Hello,
I have a 2022 Keystone 390 DS. I am wondering about a small vent on the outside of the left side, near the back. Clear water seems to be dripping from it and it looks like an app. 1 inch plastic hose goes from the outside vent to the inside the frame to something. There is also two plastic petcock valves on the undercarriage. I think the one on the right is to drain the fresh water tank, [we always use city water], but I do not know what the one on the left side between the axles is for. Any help is appreciated. Thank you.
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