In addition your vinyl lined pool walls may not be strong enough to.
Draining a vinyl liner inground pool.
The older the vinyl material is the more likely this is to happen.
If you have an inground vinyl liner swimming pool then you have a minimum safe water level that you must observe at all times.
If you have an above ground pool with a vinyl pool liner drain the pool to about 1 inch below the bottom of the skimmer mouth.
Cracked liner from draining a swimming pool.
Draining a pool is a potential risky business for even gunite or plastered pools but it will usually be a disaster on a vinyl liner pool.
Draining and refilling an inground swimming pool.
This is a plastic dam which holds out the water from the skimmer allowing you to leave the water level up for the winter.
Another option for vinyl liner pools is to put an aquador over the mouth of the skimmer.
You must keep at minimum a few inches of water usually six to 12 inches is safe covering the floor of the shallow end of the pool at all times.
With that said there s always going to be a risk when you empty out a swimming pool.
Draining an inground vinyl liner pool for the winter.
If you drain your pool you can cause your vinyl pool liner to shrink and upon refilling if the liner has lost its elasticity it can cause the liner to rip or tear.
It s acceptable to drain the pool a few more inches below that if you live in an area that gets heavy precipitation during the winter months.
The water in the pool helps hold the liner into place.
This instructable is based on my experience refilling my in ground swimming pool.
This will help in supporting your cover and also help keep the liner from floating on the water s surface.
Your dealer or builder should have told their customer this but sometimes they don t and of course many people end up with a pool when they buy the house.
This procedure is mildly dangerous and potentially very costly if not performed properly wit.
I learned a few things doing so and wanted to pass those along.
In ground concrete swimming pools can also crack when the temperature is above 70 75 degrees and the surface of the swimming pool doesn t remain wet.