1. Please do not connect it to faucet because it's self-priming design. 2. Battery charging requirements: charge those batteries fully before using it otherwise it will affect this machine's water pressure and your battery life. 3. Reasons and solutions for water failure during startup: If no water comes out from this machine or water flowing is abnormal during startup, the inlet quick connector might be installed improperly, resulting in air and water leakage. Please reinstall it or consult us if you still can't make it. 4. 6 in 1 nozzle adjustment problem and solution: the 6 in 1 nozzle cannot be adjusted while starting, otherwise it will bring about water leakage. If there is water leakage due to misalignment, it's highly suggested that you can shut down this machine and adjust it to it.