A:Answer Hi RonP. Thank you for your question. The water source is required to be at least 45PSI. There should be 10' of unrestricted garden hose between the hose connection and the unit, any kinks will prevent the flow of water going into the unit and prevent proper pressure. Please check out another Greenworks Pressure Washer, which offers siphoning capabilities. We hope this helped!
(Greenworks 60V 3000-PSI 2.0 GPM Electric Pressure Washer w/ (2) 5.0Ah Batteries & Dual-Port Charger - 5121502/PW60L540)