Which adapter do I need to use my SPX-UB1 accessory with my SPX Series Pressure Washer? You need to use the SPX-TFA adapter to use your SPX-UB1 accessory with your SPX Series Pressure Washer. Related articles Pressure Washer Foam Cannon Compatibility Guide Can I use my SPX-RB1 Pressure Washer accessory with the soap dispenser that is built into my SPX Pressure Washer? Can I use another brand's accessory with my Sun Joe pressure washer? Can I use the SPX-UB1 attachment with the soap bottle on my SPX Pressure Washer? What extension cord can I use?