Recommended running 1.5 gallons of water through the filter at the time of installation before use;Wqa certified. Capacity is 300 gallons (1135 liters) or six months.
WSW-2 is Tested and Certified by NSF International against NSF/ANSI Standard 42, IAPMO R&T against NSF/ANSI 42 for the reduction of chlorine taste and odor.