The Outlast Water Fountain from Petsafe is the world's first pet fountain without a traditional pump! The patented HydroSpintechnology keeps the water flowing and eliminates the problems of traditional fountains. The fountain is easy to assemble, pump-free and dishwasher safe. It holds 1.7 liters of circulating water and has a filter system, keeping the water fresh, healthy and delicious!Facts about Outlast Water Fountain Pump Free:Pumpless water fountain for pets.Patented HydroSpintechnology keeps water flowing.Filter system for fresh and tasty water.Easy to assemble.Dishwasher safe. Holds 1.7 liters.Motor automatically shuts off at low water level. 1 filter included.