Can this be used with an in line pressure washer?

Thank you for contacting us. This product is not designed for use in the line of pressure washers. We recommend using one of our pressure wash concentrates, which should be used with "down-stream" chemical injector pressure wash machines only. "Down-Stream Chemical Injector Pressure Wash Machines": will by-pass the pump, to prevent harsh chemicals from causing possible damage to machine parts. We hope this helps. Thank you for selecting Zep Commercial products. Thank You, Zep Commercial Consumer Relations Team