Our PVC liners are custom fabricated to the dimensions of the area they are lining. For the most part the installation procedure is straight forward. The corners and bends of the liner should match up with the corners and bends of the substrate. When the liner isn’t situated exactly where it needs to be it can appear as if the liner is fabricated to the wrong size. The following pictures illustrate such an example.
In this case it appears that the liner is about six inches too deep for the tank. The middle portion of the bottom of the liner was sitting on the bottom of the tank giving the appearance that the liner was seated all the way down. In actuality, though, the corners of the liner were sitting up on the sidewalls. The way to correct this is to pull the sidewalls of the liner in towards the middle of the tank while applying pressure to the bottom corners. This will push the corners of the liner into the corners of the tank and have the liner fitting the way it was intended.
See our video on tank liner installation for a full guide.