GE FXHSC heavy duty water filters reduce sand, sediment and rust. - The GE FXHSC filter cartridge is resistant to chemicals and corrosion. - The GE SmartWater FXHSC is designed for purity, bacteriaresistance, and chemical resistance. - Replace the GE FXHSC heavy duty sediment water filter cartridge every 3 months or or when flow rate is significantly decreased. - The GE Smartwater FXHSC whole house water filter meets NSF / ANSI Standard 42 for Material Requirements.