Infinity and wet-edge pools create the effect of water spilling over an edge and disappearing into the view beyond, which is why they suit raised or view-facing Castlecrag blocks. The illusion is produced by a slightly lowered overflow wall: water flows over that edge into a hidden catch basin below, is then pumped back into the main pool, and the constant circulation is what gives Infinity & Wet-Edge Pools its mirror-and-horizon look. Because the overflow level, the wall and the basin all have to be engineered to fine tolerances, these are bespoke concrete builds rather than shells, and the design and certifier work matter as much as the finish itself. The build follows the concrete sequence of survey, structural engineering, approval, excavation, steel and plumbing, the sprayed shell, then the catch basin, the balance tank, the pumps and the interior finish, with particular care given to getting the overflow edge perfectly level so the water sheets evenly. A wet-edge pool is most effective on a Willoughby site that already has a fall or an outlook to throw the water toward, such as a downslope, a valley view or a backdrop across Sydney - North Sydney and Hornsby. The considerations are real: the balance tank and second pump add cost and a little running complexity, and the edge demands precise construction, so an experienced builder is the difference between a clean sheet of water and an uneven one. The usual AS 1926.1 barrier and NSW Swimming Pools Register rules still apply. For the right Castlecrag property, though, an infinity pool is the feature that defines the whole outdoor space, and planning the levels, plumbing and basin from the outset is what makes a flawless result achievable across Willoughby.

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Infinity & Wet-Edge Pools in Castlecrag, NSW

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