Overlap style liners are installed under the top rail of a swimming pool. The rails are removed and the liner is put in the pool, and draped over the top of the walls of the pool. Long plastic clips are placed over the liner and the top wall, holding the liner in place. The top rails are then placed back with the excess liner hanging down on the outside of the pool. The excess can then be trimmed.
Pool Liners cannot be removed from the original packaging, if so it cannot be returned or exchanged.