The IOC150 system is designed to remove chemicals, herbicides and pesticides that can contaminate a rainwater supply. It will also address taste and odour issues. This high flow carbon tank system has a granulated activated carbon media that needs to be replaced annually. The system is designed to treat the whole water supply to the house and so should be fitted on the main water line. The whole house carbon filter includes a 20 micron post filter to capture any carbon fines that may come from the carbon tank filter. It also includes a bypass head for ease of servicing.