This is a used Dosatron. These were used in a carwash until the carwash updated equipment. They have been completely disassembled and cleaned. All worked fine when everything was updated. I would suggest replacing internal seals in the near future. All is sold at Dosatron. These were used to send soap to various machines. We also have some parts available for this model and a few other models if you are needing parts to fix your unit. If you have any questions or need any certain parts for one feel free to send a message.