The Aquascape Waterfall Spillway 22" make it easy to create waterfall or stream, providing smooth, consistent, leak free water flow. As the incoming water rushes in, the water is difused by strategically positioned internal barriers to create smooth flow of water. The wide 22" spillway opening handles flow rates up to 7,500 GPH/ 28,000 LPH. Its durable design allows boulders, gravel, soil, or other creative landscape material to be set directly on top, making it easy to camoflauge into the surrounding landscape. The spillway is extremely versitile and can be used in a wide variety of water feature applications where more expensive boilogical filters are not necessary, including Pondless Waterfalls. The spillways can also be installed as an additional waterfall or stream onto a new or existing pond. Multiple spillways can be used to design larger, more creative configurations. You can also build the spillway into hardscape walls for a formal waterfall design. Installation is quick and easy. The Aquascape Waterfall Spillway 22" comes complete with fittings (2" PVC slip and 1.5" barbed) for trouble-free setup. The Waterfall Spillway 22" is backed by a limited time warranty, ensuring year after year of reliable use.