How does the Doulton/Berkefeld compare to other types of water filtration systems?
• Inline Systems: useless if you do not have water pressure • Hand Pump Units: great for camping, but hard to pump. Not practical for long term emergencies. Short life span. • Resin or Carbon-based gravity filters: short life span, typically 250 to 1000 gallons. • Ceramic-based Gravity Filters: no water pressure required, long life span of elements.