Hello, I am just getting started on TFP. I am pretty new to pool ownership, my wife and I bought our home with a 32' x 16' pool five years ago. It is an older pool, maybe from the 80s. We had four problem-free summers with the pool, but over the winter the aging vinyl liner gave out. So we contracted with a company named Pool Liner King, here in Massachusetts, to replace the liner. They came on Monday and did the installation, and all seemed to go well. We ordered two loads of water, bringing the water level near the top of the pool. The next morning we looked, and the water level had dropped almost three inches! I called the installer and told them, and they said they would come out to look the next day. So the next day comes, and I call them to say the water level was now down another six inches, for a total of nine inches over a day and a half. It was basically losing an inch of water every five hours. We didn't think it was the plumbing leaking because Pool Liner Kings did a pressure test, and everything checked out. The installer said the water loss was so great that a professional leak detection company had to be brought in. Pool Liner King contracted a company called American Leak Detection to come look at the problem. They came out yesterday, ran a ton of tests (including diving, which I must commend them for, since the water here is so cold this time of year), and determined the plumbing is in perfect shape, and the liner itself is not leaking. Here is what they determined to be the source of the leak: the installer did not install a gasket under the liner at the main drain. There is a gasket under the drain cover bracket above the liner, but nothing underneath it, so all the water is leaking out between the main drain and the liner. He filmed himself shooting some dye into the main drain, and the dye was quickly pulled out through the gap between the liner and the main drain. So, I told Pool Liner King, and they thought the leak detection company was going to fix the problem. But the leak detection company says the liner installer needs to come, drain the pool, place a gasket under the liner, reinstall the liner, and refill the pool. This report was given to Pool Liner Kings, and now I'm waiting to hear back about what the next step is. The water is almost all out of the pool, nearing the bottom. There is a warranty on the liner and installation, so I am hoping I am covered, but in the meantime, we are experiencing a lot of anxiety about how and when this is going to be fixed. Anybody that has any advice or words of wisdom is greatly appreciated!! Thanks for reading so much!!