Originally Posted by
Robt760
duPont...don't they make paint or flooring? Anyway, I think I remember seeing a review somewhere comparing the different filters and their results. Brita had the best numbers.
As far as how often to change your filter, it's not so much how long (time), but how much water (quantity) you run through it. They say to change it after filtering 40 gallons.
duPont is a bit of a conglomerate.
http://www2.dupont.com/Water_Filtrat..._US/index.html