Genuine replacement pump and power adapter for all Cat Mate and Dog Mate Fountains. This pump and power adapter combo is the genuine, direct fit, replacement for the original pump and power adapter used in all Cat Mate and Dog Mate Fountains. This super-quiet pump and adapter keep your pet's water flowing and fresh, which helps to encourage your pet to drink. Use this set to replace your original pump and adapter, or use as spare to help prolong the lifespan of the originals. This pump has a 0.5 inch outlet port and can be used with all Cat Mate and Dog Mate fountains, from our most compact Shell Fountain to our largest Dog Fountain and any other compatible fountain.