The Tsunami Recirq Kit recirculates livewell water to keep it cooler and rich in oxygen. This self-contained system feeds a separate aerator spray head and works even while you are underway and cannot use a thru-hull connection. Add this kit to any tank that already has freshwater fill system. Or use as a backup pump for a fail-safe system.. Kit Includes: One 500 GPH Tsunami Aerator Pump with Short Inlet, Threaded Outlet, One 4125-1 Aerator Spray Head, One 4232-1 Stainless Steel Strainer, Two Plastic Hose Clamps, One Poly Hose & One Straight Thread to Barb Connector; Specifications Material: Plastic; Diameter: 3/4 in.; Length: 23 in.; .