Tank not included.
The MK-RCL re-circulation loop is an option available for the MK Series Settling Tanks. The purpose of the loop is to allow the operator to re-direct the effluent in the final chamber back to the first chamber, when the tank is not "in process". This will keep the water in motion, and eliminate the cultivation of bacteria (odor). The re-circulation loop can be added to any of the MK-Series Settling tanks.