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A "relief valve" can only be accessed when the pool is empty, and no swimming pool should ever be left empty. The only exception is when absolutely necessary due to repair or resurfacing, and that should be completed within the shortest possible time.

Any pool that is empty, and that has a relief valve, should have the valve removed for the entire time, regardless of the weather forecast.

A "hydrostatic" relief valve opens and closes when needed as it attempts to equalize the pool water pressure with the ground water pressure. Human intervention is not involved because the pool is still filled. Hydrostatic valves are great in theory, but seldom work after a few years.

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โˆ™ 2014-05-04 16:58:15
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Q: Should the hydrostatic valve be left open when it is raining?
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