Back washing your pool filter is essential for keeping your water clear and this hose is used to remove wastewater from your filter. Use a ball valve or shut off the valve to reduce a mess! Each hose rolls up neatly for storage. Details: Transparent blue 2" x 2" x 25ft. Rolls up for easy storage Removes waste water from filter Long lasting, pressure tested and pinhole free Valves or other accessories not included PVC Suitable for outdoor use