The NCP1 is a filter kit designed for under sink use. It has the advantage of being able to accept a range of different filter cartridges depending on the filtration requirements. Some examples are :- NSW5 for sediment removal NCSW for sediment removal and bad taste/chlorine removal C1 for sediment removal, bad taste/chlorine removal, organic matter & discolouration. Please remember to add your choice of cartridge as the NCP1 kit does not include one.