What is a recirculating splash pad and how does it work?

Recirculating splash pads are the standard for new construction and look identical from the surface but have entirely different infrastructure underneath. Water flows through spray features just like a pass-through pad, but instead of going to storm drain after one pass, it drains into a covered underground tank. From the tank, the water is pulled through a filtration system (usually sand or cartridge filters) and a chemical treatment system (typically chlorine or UV plus chlorine), then pumped back up to the features. The loop runs continuously during operating hours. Daily makeup water is needed only to replace what's lost to evaporation, splashout onto surrounding pavement, and the small purge volume operators sometimes use to dilute contamination. Total consumption can be 90 to 95 percent lower than a comparable pass-through pad. The tradeoffs are higher capital cost (the tank and treatment system add $50,000 to $200,000), ongoing chemical costs, electricity for pumping and filtration, and more complex operator training. For drought-prone regions, the math is overwhelming.