With the Berkey Filter Priming Kit, setting up your Berkey system has never been easier. The Prime Rite Universal Primer provides a more secure seal between your Black Berkey Elements and a wide variety of faucet types. This ensures that the faucet's water is forced directly into the element, reducing the potential for unwanted leaks or messy spray during the priming process due to a poor fit between faucet and element. Similarly, the Prime Rite Fluoride Element Adaptor ensures a secure fit—and a better, dryer priming experience—between your faucet and Berkey PF-2 Fluoride and Arsenic Reduction Elements. The Anti-Airlock Clip easily snaps onto the top of your system's lower water chamber to prevent "vapor lock", a naturally occurring phenomenon which can impede the flow of water from your system's spigot due to climate, elevation or other factors that may cause system chambers to expand or contract and create too tight of a fit for proper air flow. Two vials of specially formulated red food dye are also included for use when performing a system assembly verification test (also known as the red food coloring test). The assembly verification test verifies that your system has been assembled correctly, and that there are no internal leaks in your system (the test does not demonstrate the complete reduction of all possible contaminants, it is simply meant to confirm correct assembly of system as intended).

From the Manufacturer:
Berkey Water Systems is the leader in gravity-fed filtration systems and trusted choice of adventurers, preppers, off-grid homesteaders and families for over 20 years. Berkey Systems were originally designed for extreme use for emergency preparedness and off-grid activities, and are also now used every day in millions of homes around the world by discerning, health conscious consumers who have declared water independence. Berkey systems provide economical, long-lasting water filtration for just pennies a gallon.