Draining Your Pool: Ideally, the pool should not be drained until very shortly prior to installation of the new liner. This reduces the chance of a cave-in or the material beneath the liner drying out. If the pool must be drained to measure for a new liner, the old liner should be put back into place as best as possible to keep the sun from drying out the sand or vermiculite base.
Removing the Old Liner: First, using a knife or a pair of scissors, cut out from around all fittings (lights, skimmer, return lines, etc.) thus freeing the liner from these areas. Next, check the liner track which is at the top of the pool wall. If the liner track is aluminum, you will probably see a gray locking strip around the perimeter of the pool at the very top edge of the liner.
Cleaning The Track: The liner track must be free of debris in order for the new liner to properly fit into it.
Creating An Air Seal: Using Duck Tape or Silicone Sealant, seal all cracks in fiberglass and wood walled pools. Concrete and block walled pools will already be sufficiently air tight.
Removing Fittings: At this time, you are ready to remove the face plates from the fittings. This is a very important phase as you want to make sure all the face plates will go back in securely when the new liner is installed.
Inspect Your Pool Wall: All burrs, etc. which may protrude into the new liner should be removed from the pool wall. You can flat blade the pool wall with a steel trowel and generally knock debris loose. Bad lumps may require grinding or rubbing with a concrete block.
Preparing The Pool Base: The pool base must also be free of all items that would protrude into the liner. In the case of a sand bottom, remove all rocks and foreign matter, wet the sand and trowel into place. A Bull nosed, steel floats work best for trowling.
Installing The Liner: If there are inside gaskets on the flanges of the pool fittings, secure them in place. Place the liner box at the shallow end of the pool with the arrows pointing toward the deep end.
Aligning Your Liner: Align the deep end corners first. In the case of rectangular pools, boomerang shaped pools, or pools with corners of any kind, alignment should begin at these corners.
Vacuum Fitting The Liner: Using a Wet-Dry-Shop vacuum, remove the deck plate and run the suction hose down through the skimmer and out approximately 18″ through the mouth of the skimmer, so that the suction hose is between the pool wall and the liner.
Filling The Pool: Only when the above conditions have been satisfied should filling of the pool begin. Leave the vacuum running and begin filling. If the pool has a main drain, allow about 18″ to 24″ of water to accumulate at the deep end before securing the face plate to it.
Continuation Of Filling: Allow the pool to fill until the water level is high enough on the pool wall so that the liner is tight against the wall all around. AT THIS TIME, you may turn the vacuum off and remove the suction hose.
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