Index: leahi_dialin/dd/dialysate_delivery.py
===================================================================
diff -u -r20c821bd230fc7689a0275a2918981669ff5cc19 -rd0391ac112347f9c7021b0995bd4b22657fe9f66
--- leahi_dialin/dd/dialysate_delivery.py	(.../dialysate_delivery.py)	(revision 20c821bd230fc7689a0275a2918981669ff5cc19)
+++ leahi_dialin/dd/dialysate_delivery.py	(.../dialysate_delivery.py)	(revision d0391ac112347f9c7021b0995bd4b22657fe9f66)
@@ -31,6 +31,7 @@
 from .modules.pre_gen_dialysate import DDPreGenDialysate
 from .modules.rinse_pump import DDRinsePump
 from .modules.spent_chamber_fill import DDSpentChamberFill
+from .modules.substitution_pump import DDSubstitutionPump
 from .modules.drybicart import DDDryBicart
 from .modules.temperature_sensors import DDTemperatureSensors
 from .modules.dd_test_configs import DDTestConfig
@@ -125,6 +126,7 @@
         self.concentrate_pumps = DDConcentratePumps(self.can_interface, self.logger)        #: The Concentrat Pumps module
         self.conductivity_sensors = DDConductivitySensors(self.can_interface, self.logger)  #: The Conductivity Sensors module
         self.dialysate_pumps = DDDialysatePumps(self.can_interface, self.logger)            #: The Dialysate Pumps module
+        self.drybicart = DDDryBicart(self.can_interface, self.logger)                       #: The Dry Bicarb module
         self.events = DDEvents(self.can_interface, self.logger)                             #: The Events module
         self.gen_dialysate = DDGenDialysate(self.can_interface, self.logger)                #: The Generate Dialysate module
         self.heaters = DDHeaters(self.can_interface, self.logger)                           #: The Heaters module
@@ -134,7 +136,7 @@
         self.pre_gen_dialysate = DDPreGenDialysate(self.can_interface, self.logger)         #: The Pre Generate Dialysate module
         self.rinse_pump = DDRinsePump(self.can_interface, self.logger)                      #: The Rinse Pump module
         self.spent_chamber_fill = DDSpentChamberFill(self.can_interface, self.logger)       #: The Spent Chamber module
-        self.drybicart = DDDryBicart(self.can_interface, self.logger)                       #: The Dry Bicarb module
+        self.substitution_pump = DDSubstitutionPump(self.can_interface, self.logger)        #: The Substitution Pump module
         self.temperature_sensors = DDTemperatureSensors(self.can_interface, self.logger)    #: The Temperature Sensors module
         self.test_configs = DDTestConfig(self.can_interface, self.logger)                   #: The Test Configs module
         self.ultrafiltration = DDUltrafiltration(self.can_interface, self.logger)           #: The Ultrafiltration module