The best high quality Dog & Cat Waterer on the market. You can provide a constant flow of water to your dog or cat continuously day after day. This product is stainless steel and built to last forever. The nelson pet waterer easily attaches to your existing spigot or if you don't have access to an existing spigot you can run a rubber or copper tubing to the automatic dog waterer. As your dog or cat drinks the water the waterer automatically refills your pets water level to one hundred percent, so you can leave your home and be assured that your pet always has fresh water.