Features: It clears the pores of debris in the Black Berkey™ Elements that has accumulated with use. Reduces the amount of time and effort needed to dry the filters prior to storing them. For small sink or short faucet, the Black Berkey Primer makes it easy to prime your Black Berkey Purification Elements. The Black Berkey primer also purges (or back-flushes) the Black Berkey Purification Elements using air instead of water to clean the pores of the compressed carbon filter wall. Specifically designed for use with the Black Berkey Purification Elements. May be cleaned with mild soap and warm water. Do not microwave the Black Berkey Primer. Store in a cool dry place and keep out of direct sunlight. !!!!!-----!!!!! Details: What is the Black Berkey Primer™ & what does it do? The Black Berkey Primer™ is a hand-powered priming pump that makes it possible to prime Black Berkey™ Elements easily offline, without the need for faucets or hose connections. Priming the Black Berkey™ Elements saturates the filters with water prior to their use, allowing for clean water production anywhere. How does the Black Berkey Primer™ work? With a Black Berkey™ Element properly immersed in water & attached to it, the Black Berkey Primer™ creates a simple pressure gradient which draws water into the center of each Black Berkey™ Element. Once the Black Berkey™ Element is completely saturated with water, it passes through the Black Berkey Primer™ and squirts out of the opposite end. Why do I need the Black Berkey Primer™? Every owner of a Berkey® Water System which uses Black Berkey™ Elements will find it easier to prime and purge the filters, wherever the Berkey® is used. The Black Berkey Primer™ is the final piece in making your Berkey® Water System your off-grid solution for clean drinking water and for everyday use. In addition, if you have a small sink or short faucet, the Black Berkey Primer™ makes it easy to prime your Black Berkey™ Elements. How do I clean & store the Black Berkey Primer™? Black Berkey Primer™ can be cleaned with a proper dilution of natural cleaning products, or mild soap and warm water. Components should be thoroughly rinsed & allowed to air dry prior to storage in a cool, dark, & dry place. Keep out of exposure from direct sunlight as UV light will breakdown the product. Do not microwave the Black Berkey Primer™ .