WaterWay 001501, a top-of-the-line cartridge filter, offers crystal clear and inviting pool water. Its 2.5" internal plumbing, the largest in the industry, minimizes restrictions and improves water flow. The four-cartridge design simplifies element removal and extends cleaning cycles, while the state-of-the-art internal design ensures efficient filtration. With a chemical-resistant glass fiber reinforced polypropylene tank, it guarantees exceptional strength and longevity.