28 May Kitchen Faucets, Kitchen Faucet with Low Pressure How-To: Repressurizing a Reverse Osmosis (RO) System February 5, 2020 Posted by Nick Fox How to repressurize a reverse osmosis unit using a bike pump. The target pressure for these systems is typicall between 5-7 psi. You will need a bike pump or an air compressor. Facebook Twitter Email Pinterest LinkedIn