Check the listing for details. Savio Pondless Waterfall Well™ and Extension. Condition: New. Listed at 239.20 USD. This listing includes 1 Savio Waterfall Well™ and 1 Savio Waterfall Well™ Extension: SAVIO WATERFALL WELL™ Patented design protects your pump from the crushing forces of rock and water with a structurally tough injection-molded housing. The durable snap-fit enclosure is easy to assemble and contains no moving parts. Multiple uses for irrigation, rain collection, drainage, and lift-pump applications. Handles flow up to 15,000 gph. SAVIO WATERFALL WELL™ EXTENSION Increase the depth and holding capacity of Pond Free® systems. This extension fits the Savio Waterfall Well for creating larger pond free or disappearing waterfalls and streams. Use the extension for a deeper waterfall reservoir for a larger system. This will allow less of a footprint in the landscape area. Waterfall Well Extension Height: 18.75 inches