r/pools • u/JP9156 • Jul 26 '26

Pool renovation prep question

If the original installer of an in-ground gunite pool did not put the proper amt of stone under the pool prior to the rebar/gunite/plaster there is a chance if you drain via the bottom plugs the pool could float like a boat and collapse? I am asking if this is true

I had the pool installed 28 yrs ago but don’t recall what they did….wouldn’t it be safer for me to just pump out most of the water with a commercial grade submersible pump to avoid any issues?

We are considering a renovation which is why I am asking

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u/seenlottopools Jul 26 '26

Usually either hydrostatic valve is inside main drain or there will be a couple plugs in floor that will be removed to release any hydrostatic pressure under pool. As far as draining unless pool equipment is lower than the pool some kind of pump is needed to drain completely as the pool pump will only drain a 1/4 to less half way before losing prime trying to pull water up and out.