Vanishing Edge Swimming pool features one or more walls that come to water level rather than above it (as with a conventional in-ground pool). ... Overflowing water falls into a catch pool – a sort of basin that sits beneath the vanishing edge. From here, the water is collected and pumped back into the main pool.
An infinity edge pool (also named negative edge, zero edge, disappearing edge or vanishing edge pool) is a swimming or reflecting pool which produces a visual effect of water extending to the horizon, vanishing, or extending to “infinity”.
Vanishing Edge Swimming Pool design (also referred to as a knife edge swimming pool or a wet edge swimming pool) incorporates the infinity-edge look but differs in that the design allows water to spill over all four sides. Like the infinity design, the water that flows over the sides of a perimeter-overflow pool is collected in a hidden catch basin and recirculated. Some perimeter-overflow designs include elevated edges that spill into a catch basin below while other perimeter overflow designs sit the pool flush within the deck with the overflow spilling into a narrow hidden catch basin underneath.