Common problem, I think! We had our pool put in by professional (?) installers about a month ago. I had the same problem, and also could not get any help from the installers or the pool people. What I ended up doing was using teflon tape. Now, I now nothing about pools, plumbing or really anything like that - I am in medical field - but figured that it works on my faucet in the kitchen, so it certainly couldn't hurt! IT WORKED! Then, I noticed all of my other lines leaking slowly, where the gasket is, and did the same thing - now no leaks