What is the minimum pressure needed to operate the SPX-SRL9 Sky Lance? Sun Joes universal Sky Lance is designed to work with most gas and electirc pressure washers between 1800 to 4000 PSI. Related articles Is this accessory compatible with other brands of pressure washers? Can I adjust the spray of the Sun Joe Sky Lance? Rotary Brush SPX-RB1 Usage Guidance for SPX3000 Are these accessories compatible with my Pressure Washer? How will the SPX-APC1G gallon pressure washer cleaner come packed?