The Jabsco 30573-0003 is a pressurized mini accumulator tank with Quick-connect/disconnect Ports. This is a Food-grade tank with nylon shell, butyl liner, and stainless steel fasteners. It has a total internal volume of 21.5 oz. (0.65L) and a max operating pressure 125 psi (8.6 bar), and a pre-charge pressure of 10 psi (0.7 bar). The air fill valve is a standard automotive style tire valve. This accumulator tank is intended for installation in any pumped water system controlled by a pressure switch, and may also be used with air-driven pumps. The tank can serve as a storage vessel as well as a pulsation dampener for pressurized fluid. The accumulator tank smoothes water flow and reduces on/off switch cycling of the pump by lessening the variation in pressure and flow between the pump and the system discharge points. The even flow of water gives better control of hot water temperature with systems using instant water heaters. This tank improves all pressure controlled water systems. This new compact 21oz (0.6L) Accumulator Tank fits into those tight areas and performs all of the same functions as our 1 Quart (1L) model, but in a smaller package.