OEM 4 Pack 240 SqFt Cartridges 

The Clean and Clear Plus Filter and cartridges are certified to NFS/ANSI Standard 50 to ensure the product meets industry standards to help protect water, consumers, and the environment. The NFS mark assures consumers, retailers, and regulators that certified products have been rigorously tested to comply with all standard requirements. These Pentair Genuine cartridges have been factory tested and certified to NSF/ANSI Standard 50 to provide extreme quality and superior performance compared to generic options.