What is the difference in filtration between a Whole House filter and an Undersink filter?
The Whole House units filter for taste, odor, rust, and sediment only. The cartridge filter media must have large enough pore space to allow a high volume flow for showers, toilets, dishwashers, etc. The Undersink units filter for taste, odor, rust, and sediment as well as lead, VOCs, and bacteria (such as Giardia and Cryptosporidium). The removal of these contaminants requires more contact time with the filter media and therefore would not allow sufficient flow volume for showers, toilets, and other appliances. Top 9.
