Index: firmware/App/Controllers/ROPump.c
===================================================================
diff -u -r2475e55c224cbd841d61b76f1618451efe6be1f5 -r9f79bc2ee4ab3e5b3b14c4a1d9c337af5d001ebd
--- firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision 2475e55c224cbd841d61b76f1618451efe6be1f5)
+++ firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision 9f79bc2ee4ab3e5b3b14c4a1d9c337af5d001ebd)
@@ -46,17 +46,19 @@
 #define ROP_PRESSURE_CONTROL_P_COEFFICIENT          0.15F                                                               ///< P term for RO pump pressure control.
 #define ROP_PRESSURE_CONTROL_I_COEFFICIENT          0.65F                                                               ///< I term for RO pump pressure control.
 
-#define ROP_FLOW_TO_PWM_SLOPE                       155.31F                                                             ///< Slope of flow to PWM line equation.
-#define ROP_FLOW_TO_PWM_INTERCEPT                   -699.99F                                                            ///< Intercept of flow to PWM line equation.
+#define ROP_FLOW_TO_PWM_SLOPE_PERM_FLUSH            117.63F                                                             ///< Slope of flow to PWM line equation for permeate flush.
+#define ROP_FLOW_TO_PWM_INTERCEPT_PERM_FLUSH        -648.05F                                                            ///< Intercept of flow to PWM line equation for permeate flush.
+#define ROP_FLOW_TO_PWM_SLOPE_MAX_RECOVER           155.31F                                                             ///< Slope of flow to PWM line equation for max RO recovery.
+#define ROP_FLOW_TO_PWM_INTERCEPT_MAX_RECOVER       -699.99F                                                            ///< Intercept of flow to PWM line equation for max RO recovery.
 #define ROP_PRESSURE_TO_PWM_SLOPE                   0.5F                                                                ///< Slope of pressure to PWM line equation.
 #define ROP_PRESSURE_TO_PWM_INTERCEPT               0.0F                                                                ///< Intercept of pressure  to PWM line equation.
 
 #define DATA_PUBLISH_COUNTER_START_COUNT            10                                                                  ///< Data publish counter start count.
 
 #define ROP_PRESSURE_TO_PWM_PCT(pres)           ( ( ROP_PRESSURE_TO_PWM_SLOPE * pres + ROP_PRESSURE_TO_PWM_INTERCEPT ) / MAX_FLUID_PUMP_PWM_DUTY_CYCLE ) ///< PWM line equation for pressure. converted to percentage.
 
-#define ROP_FLOW_TO_PWM_PCT(flow)               ( ( ROP_FLOW_TO_PWM_SLOPE * log(flow) + ROP_FLOW_TO_PWM_INTERCEPT ) / MAX_FLUID_PUMP_PWM_DUTY_CYCLE )    ///< PWM line equation for flow converted to percentage.
-#define ROP_FLOW_TO_PWM(flow)                   ( ROP_FLOW_TO_PWM_SLOPE * log(flow) + ROP_FLOW_TO_PWM_INTERCEPT )                                        ///< PWM line equation for flow converted to percentage.
+#define ROP_FLOW_TO_PWM_PCT(slope, intercept, flow) ( ( slope * log(flow) + intercept ) / MAX_FLUID_PUMP_PWM_DUTY_CYCLE )    ///< PWM line equation for flow converted to percentage.
+#define ROP_FLOW_TO_PWM(slope, intercept, flow)     ( slope * log(flow) + intercept )                                        ///< PWM line equation for flow converted to percentage.
 
 #define FP_FLOW_RATE_BELOW_TARGET_TIMEOUT_MS        ( 10 * MS_PER_SECOND )                                              ///< Timeout for flow rate below 75% of target flow rate
 #define FP_FLOW_RATE_BELOW_TARGET_CLEAR_MS          ( 10 * MS_PER_SECOND )                                              ///< Clear timeout for flow rate below target flow rate 
@@ -632,8 +634,13 @@
  *************************************************************************/
 static F32 roPumpFlowToPWM( U32 targetFlow )
 {
-    F32 dutyCyclePct = ROP_FLOW_TO_PWM_PCT( targetFlow );
+    F32 dutyCyclePct = ROP_FLOW_TO_PWM_PCT( ROP_FLOW_TO_PWM_SLOPE_MAX_RECOVER, ROP_FLOW_TO_PWM_INTERCEPT_MAX_RECOVER, targetFlow );
 
+    if ( FP_PRE_GENP_PERMEATE_FLUSH == getCurrentFPSubMode() && ( FP_MODE_PGEN == getCurrentFPOperationMode() ) )
+    {
+        dutyCyclePct = ROP_FLOW_TO_PWM_PCT( ROP_FLOW_TO_PWM_SLOPE_PERM_FLUSH, ROP_FLOW_TO_PWM_INTERCEPT_PERM_FLUSH, targetFlow );
+    }
+
     return dutyCyclePct;
 }