Zodiac CL580 CL Series Cartridge Filter, 580-Square-feet CL Series cartridge filter Constructed of durable, corrosion resistant, heavy duty high tech polymeric materials for long lasting performance Includes a unique pressure gauge with a clean or dirty indicator that can be customized for each pool, making it easy to assess filter condition Optional anchor brackets easily attach to the filter tank and mount to the pad to hold the filter securely in place Includes 2-inch by 2-1/2-inch universal unions; measures 580-square-feet