The Cobalt Aquatics E-X-T In-Line Pump is a compact, silent, and versatile unit capable of pushing or pulling water through your system. Perfect for driving aquarium equipment (e.g. canister filters, UV clarifiers, etc.), this energy-efficient 210 gph pump operates silently at a modest 6.5 watts. It can be installed inside or outside your aquarium, fully submerged or out of water, and in-line of either the supply or return hoses. The E-X-T In-Line Pump installs effortlessly with its 5/8" hose barbs, and includes a pair of seal locking rings to maintain a secure, watertight connection. For quality assurance and peace of mind, it is backed by a 3 year limited manufacturer's warranty.