Hey all, just got our Intex 18'x52" pool set up yesterday. After we got out of the pool today we noticed that the connection of the pipe coming from the pool into the pre-filter assembly (see circled in attached picture) was leaking. I started tightening the nut and after it turned a little it popped back off some. So I had to tighten it again. Same thing, it popped back loose. It seems like I can tighten maybe enough to be ok, but I'm not sure. Will it keep loosening on its own? Is this going to be a problem? Do I need to get replacement parts? I also attached a pic of the model.