NorWeco Bio-Dynamic LF 1000 Chlorine Tablet Feeder Chlorinator - (NSF Approved) Compact LF Series Bio-Dynamic tablet feeders provide a strong chemical dose ideal for onsite systems. Compact Bio-Dynamic LF Series tablet feeders provide a chemical dose that is ideal for potable water and wastewater systems subject to high organic loading. Manufactured from ABS for durability and easy installation, integral inlet and outlet hubs accept four or eight inch piping. LF Series feeders are typically used for residential or small commercial onsite applications, stormwater treatment or remote potable water systems. for flows of 75 to 1500 gallons per day