Bob has asked me to contact you regarding our recent purchase of the #CAC02ACW sprayer. We could not be happier. On our first day of use we removed efflorescence from over 9000 square feet of building surface area with one pump and neutralized the same area with the second pump at the same time. The final phase of this job was applying waterproofing. Using both pumps we covered the same area in a four hours. The advantage of applying this waterproofing at low pressure in close proximity to parking lots and landscape plantings was invaluable. We have had this machine’s predecessor “Acid Express II’ for many years and I can tell you that Bob has outdone himself with this new design. This sprayer has been on every restoration, cleaning and painting job on our schedule since the day it arrived and has worked without incident.