I'm responding, even though the poster did not start his own thread.
purchased a Doughboy brand above-ground pool liner for my 15' pool and had it professionally installed (installer said Doughboy was best). Same installer as 14 years earlier when entire pool was installed.
Within a month I discovered a leak at a seam, a bad seal in the manufacturing process. Doughboy wanted me to cut out the area with the leak, and also the area with a Sharpie-written manufacturing number, and ship that to them for evaluation (10 year warranty or so). Well, that was obviously out of the question (I could put a pencil through the hole), and they would not accept a local Doughboy dealer's opinion either. Finally after fighting for 2 months (and doing a home-made patch), I told them that I would just post the facts everywhere on the Internet, and Doughboy realized that loss of even ONE pool sale would be worse than replacing the liner. So they agreed to send a new liner if I would pay shipping, and I reluctantly agreed.
Well, that liner has been in a closet now, and I've got apparently leaks in 2 other places, so that newer liner might go in next spring, and I'd try doing that myself. Believe me, sad that sometimes one has to complain a bunch to get action.
In April 2021 I needed to drain the water and planned to fix those two leaks, but when mostly drained a windstorm came up and damaged my pool structure and tore the old liner to shreds. So a week later, my daughter and I installed that liner that had been in my closet, my first install, took us 3 hours and 3 upright posts needed to be shortened due to rust from leakage/damage.