Compact, lowvoltage diaphragm water pump for portable and smallscale liquid transfer tasks. The CJWP08 M20 delivers reliable vacuum selfpriming suction at a controlled low flow, making it useful for hobby, laboratory, and light industrial applications that require a small, batterycompatible pump. Key benefits Selfpriming suction: Starts pumping without manual priming, reducing setup time and making it easier to use in portable and remote applications. Lowvoltage operation: Designed for direct drive from 3V, 3.3V or 3.7V DC sources, enabling batterypowered use and simple integration with small DC systems. Precise low flow: 0.3 L/min flow rate provides steady, lowvolume delivery when accuracy and gentle flow are required. Simple integration: M20 connection form factor (M20) supports compact installations and easy mounting in small assemblies. Main attributes Model: CJWP08 M20 (variant A) Type: Diaphragm water pump with vacuum selfpriming suction Voltage compatibility: DC 3V, 3.3V, 3.7V Flow rate: 0.3 L/min Quantity: 1pc Performance and use The diaphragm design produces stable flow with minimal pulsation suitable for dosing, small dispensing systems, and lowflow circulation. Operating at 3V–3.7V allows direct use with common battery configurations (for example, 2×AA ≈ 3V or a singlecell Liion ≈ 3.7V) or compatible DC supplies without additional electronics. The M20 connection simplifies physical mounting and tubing attachment in compact setups. Suggested applications Portable water dispensers and fieldtesting rigs where battery operation and selfpriming are required. Small hydroponic or plantwatering systems and terrarium misting setups needing accurate lowvolume flow. Robotics, model boats, and DIY electronics projects that require a lightweight, lowvoltage pump for circulating or transferring small amounts of water. Installation and care tips Use a DC supply that matches the listed voltages (3V, 3.3V or 3.7V) to avoid overvoltage and ensure expected performance. Fit a small inlet filter or mesh to prevent debris from entering the diaphragm chamber and extend pump life. Keep the pump and fittings clean and of sediment. When storing for long periods, flush with clean water and dry if possible. This CJWP08 M20 diaphragm pump provides a compact, lowvoltage, selfpriming solution for lowflow liquid handling tasks where portability, simplicity, and controlled flow rate matter.