The Aquascape Dual Union Check Valve 2.0 is designed to effectively prevent backflow in ponds and water features while offering a professional connection for pumps and plumbing inside pond skimmers and Pondless® Waterfall Vaults. Its durable, swing-style flapper ensures long-lasting performance, allowing maximum water flow when open and preventing backflow when the pump is off or during a power outage. Innovative reversible fittings eliminate the need to search for the right pump or filter fitting—simply rotate the fitting to match your setup. With union connections on both sides, pump and filter maintenance is quick and tool-free. The Dual Union Check Valve 2.0 is also compatible with various filter sizes, allowing easy valve height adjustments when necessary.