Index: leahi_dialin/common/dd_defs.py
===================================================================
diff -u -re9a1b8796610fd165c45a0a2c9c2034e00a77546 -r6a5bc5eee873a4317b720a8e5bf85cdce22eb85a
--- leahi_dialin/common/dd_defs.py	(.../dd_defs.py)	(revision e9a1b8796610fd165c45a0a2c9c2034e00a77546)
+++ leahi_dialin/common/dd_defs.py	(.../dd_defs.py)	(revision 6a5bc5eee873a4317b720a8e5bf85cdce22eb85a)
@@ -347,23 +347,23 @@
     D3_VALV                             = 12    # Valve Hydraulics Inlet (D3)
     D80_VALV                            = 13    # Valve Dry Bicarb (D80)
     D81_VALV                            = 14    # Valve De-scaler (D81)
-    D83_VALV                            = 15    # Valve De-scaler (D83)
-    D88_VALV                            = 16    # Valve De-scaler (D88)
-    D91_VALV                            = 17    # Valve De-scaler (D91)
-    D95_VALV                            = 18    # Valve De-scaler (D95)
-    D100_VALV                           = 19    # Valve De-scaler (D100)
-    RSRVD_SPACE1                        = 20    # This space has been reserved
-    D23_VALV                            = 21    # Balancing chamber Valve 1 (D23)
-    D19_VALV                            = 22    # Balancing chamber Valve 2 (D19)
-    D25_VALV                            = 23    # Balancing chamber Valve 3 (D25)
-    D21_VALV                            = 24    # Balancing chamber Valve 4 (D21)
-    D24_VALV                            = 25    # Balancing chamber Valve 5 (D24)
-    D20_VALV                            = 26    # Balancing chamber Valve 6 (D20)
-    D26_VALV                            = 27    # Balancing chamber Valve 7 (D26)
-    D22_VALV                            = 28    # Balancing chamber Valve 8 (D22)
-    D79_PMP_VALV                        = 29    # D79 pump mapped to spare valve 0
-    SPARE1_VALV                         = 30    # Spare Valve 1
-    SPARE2_VALV                         = 31    # Spare Valve 2
+    RSRVD_SPACE1                        = 15    # This space has been reserved
+    D23_VALV                            = 16    # Balancing chamber Valve 1 (D23)
+    D19_VALV                            = 17    # Balancing chamber Valve 2 (D19)
+    D25_VALV                            = 18    # Balancing chamber Valve 3 (D25)
+    D21_VALV                            = 19    # Balancing chamber Valve 4 (D21)
+    D24_VALV                            = 20    # Balancing chamber Valve 5 (D24)
+    D20_VALV                            = 21    # Balancing chamber Valve 6 (D20)
+    D26_VALV                            = 22    # Balancing chamber Valve 7 (D26)
+    D22_VALV                            = 23    # Balancing chamber Valve 8 (D22)
+    D79_PMP_VALV                        = 24    # D79 pump mapped to spare valve 0
+    D83_VALV                            = 25    # Valve De-scaler (D83)
+    D91_VALV                            = 26    # Valve De-scaler (D91)
+    SPARE1_VALV                         = 27    # Spare Valve 1
+    SPARE2_VALV                         = 28    # Spare Valve 2
+    SPARE3_VALV                         = 29    # Spare Valve 3
+    D100_VALV                           = 30    # Valve De-scaler (D100)
+    SPARE4_VALV                         = 31    # Spare Valve 4
     NUM_OF_DD_VALVES                    = 32    # Number of Valves for the DD
 
 @unique