Create a perfect waterfall or stream in your landscaping with the Aquascape Waterfall Spillway 12”. With up to 4,000 GPH15,141 LPH of leak-free water flow, this wide, durable spillway diffuses the incoming water with strategically positioned internal barriers for a smooth water flow. Use boulders, gravel, soil, and other landscape materials on top for a natural camouflage. Versatile for a wide variety of applications, including Pondless® Waterfalls.