Black Berkey PrimerThe Black Berkey Primer is a hand powered priming pump that allows you to prime your systems Black Berkey Elements almost anywhere without a pressurized faucet or hose connection. Priming Black Berkey Elements saturates the filters with water prior to use, removing any pockets of air trapped inside the filters which can slow down the filters' ability to produce clean water. Black Berkey Elements must be primed before first use to insure proper