Is it something like this that makes you think there's water in the tank?
One of mine has puked out about a gallon three times over the years, and I suspect that it's just aeration due to cold fluid since it has only happened when it's around -10 or less.
For whatever reason, that's the only one that does it, and they all have the same NAPA AW-32 in them, and it starts when raising the loader to drive off from where it's parked. Also, I do drive almost immediately after starting the engine.
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