The Small Clean Flow automatic filtering watering bowl is extremely quiet and mess free with K&H’s leak proof design. The water pump is CUL Listed and cycles the water through the charcoal filter at a rate of 130 times per hour. This process keeps the water fresh and encourages your pet to consume more water making them healthier. The Small Clean Flow is upgradeable to add a reservoir tank on to the standard unit or you can purchase it together with the tank. Cleaning the bowl is easy as it is dishwasher safe. The Small Clean Flow also comes with a Two year warranty.