High-Flow 5 GPM Pump: Our high-performance 12V diaphragm pump delivers 5 GPM (18.9 L/min) max flow, 70 PSI max pressure, and 10 ft self-priming height. Quickly draw water from distant tanks without pre-fillingsupports short dry-run starts Automatic Start & Stop: Features a pressure switch tested over 200,000 cycles and a bypass valve. Open the faucet and the water pump auto starts, close it and the pump auto stops instantly. You can also adjust the water pressure with a hex wrench Low Noise, Vibration Reduction: 4-chamber diaphragm pump paired with a pure copper motor for smooth operation, reducing water pulsation and vibration. Keep noise as quiet as a 50 dB soft conversation 1/2-Inch Hose Connection: Equipped with a hose adapter, our diaphragm pump quickly connects to any standard 1/2 in hose