Special offer on the Big Berkey water filter system. Now with the addition of the high quality sight glass spigot you can enjoy the benefit of always knowing how much filtered water is in your berkey and how much water you need to add without overfilling. The Big Berkey is our best selling water filter system and is engineered to produce enough purified drinking water for families and groups of up to 8 people. This special package deal comes complete with easy to understand instructions and everything you need to start producing filtered water within minutes of assembly. Includes the standard spigot along with the water view spigot. All Berkey water filters operate without the need for water pressure or electricity. Filter water from most sources including lakes, rivers or standing water while reducing harmful bacteria, viruses and unwanted chemicals.