The Petmate Infinity Elite Purifying Pet Fountain is remarkable and pioneering with the introduction of ultra violet light technology which continuously blasts bacteria, viruses and waterborne pathogens, providing healthier and cleaner filtered water. Utilizing a 2 stage filtration system to help remove impurities with an easy adjust water flow. Large capacity reservoir with no-spill valve. Cools water naturally, advanced water lift system (no pump) which is quiet, reliable and efficient. Helps your pet to drink more water to better health. 125-Ounce model is perfect for cats.