Set the water timer and let the Porch Potty rinse itself clean every day. Enjoy the convenience of never having to worry about cleaning your Porch Potty. Just pick up any solids and let the Porch Potty rinse itself. The water timer serves two purposes. It keeps the Training Sod watered, and it rinses the grass clean of urine to prevent odor build up. Works well for both Training Sod and Synthetic Grass