The Platinum Drinkwell is suitable for cats and small dogs. The Platinum Drinkwell has 2 major advantages over the standard model. Firstly the unit holds over a gallon and a quarter (178 fluid ounces) of water in a built-in additional capacity reservoir and is compact. Secondly, the motor is fully submerged making it extremely quiet. The fountains design means that the motor is really accessible and easy to remove for cleaning. In the same way as the Standard and Big Dog Drinkwells it continuously circulates water through a carbon filter keeping it aerated and chilled. A stream of water 'free falls' from a spout into the bowl running all the time. A changeable filter removes food particles, hair, chlorine and odours. DRINKWELL Platinum uses the same replacement filters as the other two fountains in the range, it plugs into the mains, is guaranteed for 12-months and all replacement parts are available.