Jabsco Accumulator Tank w/Internal Bladder 1L. For example PAR-MATE 2.5 or any Jabsco pressure pumps as found in boats RV's motor caravans coaches and similar applications. The Accumulator Tank smoothes water flow and reduces on/off cycling of the pump by lessening the variation in pressure and flow between the pump and the outlets in the system. The even flow of water gives better control of hot water temperature especially noticeable with instantaneous gas water heaters and with showers. The reduced on/off cycling reduces noise from the pump motor and from shock pressures (pipe hammer). It also reduces battery drain and gives longer pump life. Specifications for Jabsco 1L Accumulator Tank w/Internal Bladder: Manufacturer: Jabsco Color: Black Features of Jabsco 1L Accumulator Tank w/Internal Bladder Internal Bladder Smoother and More Even Flow Quieter Water System Better Temperature Control Longer Pump life Lower battery Drain Simply fitted to new or existing systems Compact size Snap-in port fittings include both: 1/2" barbed hose fittings and 1/2" threaded hose fittings Tank: hygienic light compact impact and pressure resistant plastic construction Package Contents: Jabsco 1L Accumulator Tank w/Internal Bladder Jabsco 30573-0000: Accumulator Tank w/Internal Bladder 1L