VEVOR Shallow Well Jet Pump, 800W, 230V 3300 L/H Maximum Flow Rate, PP Garden Well Jet Pump with 8 m Suction Height, Thermal Protection, European Voltage Standards, for Garden Irrigation Lawn Watering

No, the flow rate and pressure cannot be adjusted directly on the unit, but you can install a ball valve on the outlet pipe for adjustment.

Regular tap water is sufficient to power a pressure washer; it depends on how much pressure the customer needs. If this answer does not resolve your issue, please contact us again for assistance.