Available in 60 PSI and 90 PSI Accumulator holds 2-4 oz. (3.6/118cc) of water under pressure 32 oz. (.9 Lt.) total capacity air and liquid. Accumulator reduces pump cycling. Equipped with Shurflo pressure reducing valve for added safety against fluctuating water pressure. Pressure reducing valve eliminates the need for a costly water regulators. Adjustable pre-charge pressure. Pump can run dry without damage