NoFear95: I am not sure which tubing you are referring to?? The flow rate of the Stenner pump is based on the size tubing in the pump. I selected the 10 gal/day pump, so the tubing size was automatically selected for me to provide that rate. If you mean the external tubing to connect to the chlorine source and pool piping, that was also included in the Stenner package. To which are you referring?