Index: firmware/App/Services/Reservoirs.c
===================================================================
diff -u -r9e5ee62245eb2a73b167eabd6c274a71a76a7b0e -r844282c8cfa968912a076965d84b21b933907006
--- firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 9e5ee62245eb2a73b167eabd6c274a71a76a7b0e)
+++ firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 844282c8cfa968912a076965d84b21b933907006)
@@ -48,7 +48,7 @@
 #define DEFAULT_DRAIN_VOLUME_ML                   0                                               ///< Default drain volume in mL.
 #define MAX_DRAIN_VOLUME_ML                       MAX_RESERVOIR_VOLUME_ML                         ///< Maximum drain volume in mL.
 
-#define MIN_DRAIN_INLET_PSI_EMPTY                 -3.0F                                           ///< Minimum drain inlet pressure (in PSI) to indicate reservoir is empty while drain pump on.
+#define MIN_DRAIN_INLET_PSI_EMPTY                 -4.5F                                           ///< Minimum drain inlet pressure (in PSI) to indicate reservoir is empty while drain pump on.
 #define RESERVOIR_DATA_PUB_INTERVAL               ( MS_PER_SECOND / TASK_GENERAL_INTERVAL )       ///< interval (ms/task time) at which the reservoir data is published on the CAN bus.
 #define MAX_REDUNDANT_LOAD_CELL_DIFF              50.0F                                           ///< Maximum difference in redundant load cells when determining if fill completed.
 #define MAX_DRAIN_RPM_MLP                         2400.0F                                         ///< Maximum drain RPM in mL/min.