I just launched my 320 and noticed that the bilge ran every 10 mins or so for a short burst. I did some checking and found that the connections from both the water tanks are leaking slighty. What I could not figure our is how this tubing is connected. It looks like compression fittings but the connectors are smooth, meaning the are not shaped like a nut or knurled. How do these things work? I was hoping I could just tighten them up but it looks more complicated than that.