A lot of factors are in play when we talk about the longevity of In-ground Vinyl Liners. That being said, most people change liners every 8 to 12 years. Have we seen liners last longer? Yes we have. We’ve seen liners last as long as 20 years.
To get your liner to last longer keep your pool water balanced. The best way to do this is take a water sample to the professional pool store to evaluate you readings. This is a free service that if you follow their directions, will help with your pool equipment, liner longevity, and potential clarity problems that could pop up.