The Pondmaster Pro 5000 Pond Skimmer #02475 is great for large pumps and can fit up to 2 pumps (if necessary) to feed waterfalls and will accommodate a flow rate up to 8 000 GPH. The large clog resistant leaf basket keeps debris away from the pump(s). The skimmer s maximum recommended pond surface area is 800 sq. ft. The large 11 wide x 7 tall weir opening allows maximum skimming collecting leaves and other debris from the water surface. A weir door and reinforced lid are included. The skimmer s strong cylindrical shaped housing resists side cave-ins. This skimmer is 23 H x 26 W x 23 L and weighs 18 pounds. It provides maximum bulkhead placement versatility with fittings for 1.5 and 2 flexible tubing. The skimmer has a lifetime manufacturer s warranty against cracking.