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