a puddle
Lakes, Ponds, Accumulation of water.
condensation
Liquid water.
the kidney
A low point that collects water.
a puddle
Lakes, Ponds, Accumulation of water.
Flood planes.
Lakes, Ponds, Accumulation of water.
Ponds and lakes form when water collects in hollows and low-lying areas of land.
If the tank is built properly the bottom will have a low spot with a drain valve or a "pick up" tube plumbed into the low spot. Allow the water to settle into the low spot and remove or drain the water. If you are patent and go slow it works better.
The sump is a low part, it collects stuff, often water or fuel, so it can be pumped out.
meniscus
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Water collects in large droplets in the bottom of fuel tanks when the water is in its free state.
Water can stand in any low spot. As long as there is even a small area that is lower than the surroundings water can stand.