If a swimming pool liner is floating, it is often possible to drain the water from behind the liner and reset it. If the conditions are clay, or swampy with a high water table, some of the water remediation options may need to be explored. If soil conditions are sand based, most water will drain away from under a pool relatively well. Broken underground sprinkler lines have also been found to cause water issues. Gutters and downspouts on a home also protect the pool from the additional watershed that could occur. Other potential causes of a floating liner could be inadequate yard drainage, where the yard or patio slopes toward the pool rather than away from it. It is possible that a floating liner is caused by a leak in the liner, a pin hole is enough to drain an entire swimming pool. If you have a vinyl liner pool that experiences floating, it is a good idea to assess your yard and conditions. If ground water cannot be avoided there are several options, such a burying a pump under the pool, installing ancillary sump pumps near the pool to drain the water, or having a pump available during the installation to remove the water just long enough to get the new liner in and water on top of the liner to keep the ground water under control. The concern with wet conditions for a vinyl liner replacement are that once the liner comes out, if ground water starts pouring into the pool through cracks in the hardbottom, or in between the steel walls it can cause issues with setting the liner properly and wrinkles. Ground Water and Vinyl Liner Swimming Pools It is never a good idea to empty a gunite swimming pool, unless you know exactly what you are doing.
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Please don’t think you are saving any time by draining your pool while you wait for quotes or a pool professional to come and evaluate your pool. A vinyl liner swimming pool renovation can include something as simple and straightforward as a liner replacement, or it can become more involved and include changing the coping and liner track style, repairing the bottom of the pool which is usually vermiculite that they hydrostatic relief valve in the bottom of the main drain functions to pop open and allow water in if the ground pressure is greater than the pressure holding the pool in place, it’s also important that you choose the right conditions to even attempt this.