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. The liner can also become hard and brittle. The older the vinyl material is the more likely this is to happen.
While you may think the best thing to do to prepare for winter is to drain the pool, a vinyl-lined pool should not be drained under regular circumstances. Since the water secures it to the pool, draining it can cause the liner to lose elasticity. The liner can shrink causing tears and rips upon refilling.
As noted, typical maintenance or winterizing your pool shouldn't require you to completely drain the water. You risk damaging your pool liner and the structure of your above ground pool.
What Are the Risks of Improperly Draining a Pool? First, if the draining is done at the wrong time or under the wrong conditions, you can actually risk damaging your pool structure and liner. All the water from your pool needs to go somewhere when it's drained, and that usually means the ground.
How long can you leave a pool empty? Well, the minimum amount of time possible in order to minimize the risk of serious damage. Most issues that require a pool drain will take at least a day or two to resolve, but it's recommended to not let it sit empty for any extended period of time.
Never completely drain a fiberglass or in-ground vinyl liner pool; doing so can damage the integrity of the pool surface or liner in the form of bowing or cracking. The best practice is to partially drain these types of pools. Always complete partial drains by 1/3 of the water at a time.
Close the pool for winter – but don't drain it.
In winter, the water in your pool is still your friend. Especially when properly winterized, it helps to protect the pool liner, keep it clean and prevent unnecessary damage from debris, harsh weather and other factors.
Most inground fiberglass and concrete pools are built structurally to withstand the weight of the dirt against them when drained. However, if the groundwater is high enough, it can push the entire pool out of the ground. The pool shell acts like a ship and floats up in the groundwater.
A 10,000 gallon pool will take about 14 hours to drain, the maximum rate recommended by the City of Phoenix. It will take twice as long to drain if the pool size is doubled or cut in half.
You may throw up your hands and decide the best course of action is to drain the pool and start over. In fact, draining a pool should be a last resort. Most in-ground pools will have to be drained and refilled at some point. But cleaning should not be the reason to do it.
If you have a typical rainfall, or even several inches, your pool should be fine, since drains and skimmers are designed to remove the excess water. In most cases, your pool can even handle rain from most tropical depressions and hurricanes.
As the vinyl liner dries out, it begins to shrink. This shrinkage stresses the material and in some cases, it could cause the liner to tear when re-filled with water.
Swimming pool builders often install overflow drains near the rim of the pool that prevent flooding most of the time. If you don't have an overflow drain, or if it is clogged, it is possible for periods of unusually heavy rain to overflow your pool.
you can tell if your main drain is working by perhaps putting a leaf on it. If it sticks, its working. In any case though, the main drain is not why your pool is having a problem. It has nothing to do with your pool turning green.
Brush the walls every week during swimming season while the pump is turned off. A vacuum removes the debris that collects on the bottom. Vacuuming requires moving the vacuum head over the debris on the bottom of the pool until the bottom appears clean.
Why Pool Liners Matter
Pool liners are critical because they form a barrier between the wall of the pool and the water inside of it. Many inground pools have tiled walls that eliminate the need for a liner.
Pool industry experts recommend you drain your pool and refill it every five to seven years. No two pools are alike, so there is no set number at which you must drain your pool.
In general, draining this type of pool is the trickiest. Inground pools made of concrete or gunite are susceptible to popping out of the ground if drainage is not done properly. If there has been a surplus of rain recently or your pool is located in a wet area, it is best not to try and drain the pool yourself at all.
Drain the water down to no more than 6 inches from the bottom of the skimmer if you plan to use a standard floating winter cover. Use your pool filter, switched to the "Drain" setting, to empty the pool water.
Generally, pool water needs to be replaced once every five to seven years. This should be done during mild weather so that your pool surface is not at risk from strong sunlight and heat. Your pool maintenance company can recommend when it is time to drain your pool.
Total dissolved solids is a measurement of everything that has ever dissolved in your swimming pool water. This includes minerals that separate from your pool chemicals, such as calcium and sodium, and every bit of dissolved dust, pollen, swimmer waste, algae remains – everything!