Ensure your pets have unlimited fresh filtered drinking water with the Perpetual Well Pet Watering System. Featuring a self-filling and self-draining design, this unique device offers a continuous supply of clean water for your cats and dogs. The Perpetual Well is also permanently installed, saving you time and energy from the second you set it up. Additionally, the pet watering system works without assistance through a combination of auto-fill capabilities and overflow drainage. The water bowl automatically refills with fresh water as your pet drinks. Likewise, a valve controls the water flow and refills the reservoir when the water is low. The integrated overflow system drains any excess water that may spill over the edge of the bowl so your floor stays dry. All you have to do is clean the bowl to help the Perpetual Well work at its best.