what is the difference between 20 and 25 gauge pool liners?
A 20 gauge vinyl swimming pool liner is thinner than a 25 gauge liner. ... If you have an above-ground or in-ground swimming pool that sees heavy use it's often better to go with a thicker vinyl pool liner. Both 20 gauge and 25 gauge vinyl pool liners are typically made with double-weld seams to enhance durability.