Index: firmware/App/Controllers/DryBiCart.c
===================================================================
diff -u -rff6b765b44991e46891475022fa819cf3af05156 -r99e330b5b872f68fdf2d842bd0597e54044d9ba9
--- firmware/App/Controllers/DryBiCart.c	(.../DryBiCart.c)	(revision ff6b765b44991e46891475022fa819cf3af05156)
+++ firmware/App/Controllers/DryBiCart.c	(.../DryBiCart.c)	(revision 99e330b5b872f68fdf2d842bd0597e54044d9ba9)
@@ -8,7 +8,7 @@
 * @file    DryBiCart.c
 *
 * @author  (last)      Sameer Kalliadan Poyil
-* @date    (last)      30-Apr-2026
+* @date    (last)      16-Jun-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  19-Nov-2025
@@ -56,7 +56,7 @@
 #define DRY_BICART_FILL_INITIATE_PRESSURE_PSI           1.5F                                        ///< Minimum pressure required to initiate the dry bicart fill process.
 #define DRY_BICART_FILL_COMPLETE_SUPPLY_PRESSURE_PSI    10.0F                                       ///< Maximum pressure allowed at bicart fill during supply process/state
 #define DRY_BICART_FILL_INITIATE_SUPPLY_PRESSURE_PSI    3.0F                                        ///< Minimum pressure required to initiate the dry bicart fill during supply process/state
-#define MAX_DRY_BICART_FILL_COMPLETE_PRESSURE           20.0F                                       ///< Very max dry bicart fill complete pressure for persistence on d66
+#define MAX_DRY_BICART_FILL_COMPLETE_PRESSURE           22.0F                                       ///< Very max dry bicart fill complete pressure for persistence on d66
 #define DRY_BICART_DEFAULT_MAX_FILL_CYCLE_CNT           10                                          ///< Default max fill cycle allowed for dry bicart fill/mix with water.
 #define DRY_BICART_MAX_FILL_CYCLE_CNT                   15                                          ///< Max fill cycle allowed (by override) for dry bicart fill/mix with water.
 #define DRY_BICART_MINIMUM_FILL_CYCLE_CNT               3                                           ///< Minimum fill cycle count for filling dry bicart
@@ -738,19 +738,7 @@
         {
             dryBiCartPersistenceStartTime = getMSTimerCount();
         }
-        //check the the maximum cart pressure during persistence on D66
-        if ( d66Pressure >= MAX_DRY_BICART_FILL_COMPLETE_PRESSURE )
-        {
-            setValveState( D65_VALV, VALVE_STATE_CLOSED );
 
-            lastFillDurationInMS    = currentFillDurationInMS;
-            currentFillDurationInMS = calcTimeSince( dryBiCartFillStartTime );
-            //Increment number of fill cycle
-            biCartFillCycleCounter++;
-            dryBiCartPersistenceStartTime = 0;
-
-            state = DRY_BICART_DEGAS_START_STATE;
-        }
         // 200 ms persistence on D66 pressure since pressure overshoot just after D65 opening
         if ( TRUE == didTimeout( dryBiCartPersistenceStartTime, DRY_BICART_PERSISTENCE_DURATION_MS ) )
         {
@@ -765,6 +753,10 @@
             state = DRY_BICART_DEGAS_START_STATE;
         }
     }
+    else
+    {
+        dryBiCartPersistenceStartTime = 0;
+    }
     //TODO:Handle timeout alarm for opening D65 valve too long
 
     return state;
@@ -839,6 +831,10 @@
 
             state = DRY_BICART_FILL_DURATION_CHECK_STATE;
         }
+        else
+        {
+            dryBiCartPersistenceStartTime = 0;
+        }
     }
     //TODO: Alarm when vent timeout exceeded, but pressure not dropped below expected PSI (0 psi)
 
@@ -1005,15 +1001,7 @@
         {
             dryBiCartPersistenceStartTime = getMSTimerCount();
         }
-        // check the the maximum cart pressure during persistence on D66
-        if ( d66Pressure >= MAX_DRY_BICART_FILL_COMPLETE_PRESSURE )
-        {
-            // Close water inlet valve as D66 pressure reaches max PSI(20) after persistence
-            setValveState( D65_VALV, VALVE_STATE_CLOSED );
-            dryBiCartPersistenceStartTime = 0;
 
-            state = BICARB_CHAMBER_SUPPLY_STATE;
-        }
         // 200 ms persistence on D66 pressure since pressure overshoot just after D65 opening
         if ( TRUE == didTimeout( dryBiCartPersistenceStartTime, DRY_BICART_PERSISTENCE_DURATION_MS ) )
         {
@@ -1024,6 +1012,10 @@
             state = BICARB_CHAMBER_SUPPLY_STATE;
         }
     }
+    else
+    {
+        dryBiCartPersistenceStartTime = 0;
+    }
 
     return state;
 }
@@ -1130,6 +1122,11 @@
             dryBiCartPersistenceStartTime = 0;
         }
     }
+    else
+    {
+        dryBiCartPersistenceStartTime = 0;
+        drybicartPersistenceOnLowercartPressureStartTime = 0;
+    }
 
     return state;
 }
@@ -1241,9 +1238,6 @@
         // open bypass valve
         setValveState( D34_VALV, VALVE_STATE_OPEN );
 
-        // open DD drain
-        setValveState( D53_VALV, VALVE_STATE_OPEN );
-
         // open iofp drain valve
         setValveState( M12_VALV, VALVE_STATE_OPEN );