Waterway Crystal Water D.E. Filter 48 SqFt 570-0048-07Designed for the most demanding pool installations, the Waterway Crystal Water D. E. Filter 48 SqFt sets the industry standard for performance and reliability. With 2 " internal piping, it ensures superior water flow, reduced system noise, and increased efficiencymaking it the only D. E. filter on the market with this feature. Built with fiberglass reinforced polypropylene, this filter offers outstanding durability, while the 2 bottom clean out port