It filters a full bowl up to 130 times per hour through charcoal that helps remove impurities. Keeping water fresh with the CleanFlow Water Filter invites more water consumption to help keep pet healthy. Easy cleaning and dishwasher safe. CUL-listed pump. Filters contents up to 130 times per hour. Charcoal filter helps remove impurities. Invites more water consumption. Easy cleaning and dishwasher safe.