Index: dialin/common/msg_defs.py
===================================================================
diff -u -r98864b0156fd40696751c32e98415067c736f475 -rcf56d42c5946ec79502d636db26f19fa4a1fdb64
--- dialin/common/msg_defs.py	(.../msg_defs.py)	(revision 98864b0156fd40696751c32e98415067c736f475)
+++ dialin/common/msg_defs.py	(.../msg_defs.py)	(revision cf56d42c5946ec79502d636db26f19fa4a1fdb64)
@@ -13,12 +13,12 @@
 # @date (original) 07-Aug-2020
 #
 ############################################################################
-
+from enum import unique
 from ..protocols.CAN import DenaliMessage
-from enum import Enum, unique
+from ..utils.base import DialinEnum
 
 @unique
-class MsgIds(Enum):
+class MsgIds(DialinEnum):
     MSG_ID_UNUSED = 0                                           # Zero is an undefined (un-used) message ID)
     MSG_ID_OFF_BUTTON_PRESS = 1                                 # HD/UI off button interactions
     MSG_ID_ALARM_STATUS = 2                                     # HD broadcast of system alarm state information
@@ -187,7 +187,7 @@
     MSG_ID_HEAT_DISINFECT_RSRVR2_TO_RSRVR1_DURATION_MINS = 0xA01F    # Heat disinfection reservoir 2 to reservoir 1 duration in minutes
     MSG_ID_HEAT_DISINFECT_NO_OF_CYCLES_TO_RUN = 0xA020          # Heat disinfection number of cycles to run
     MSG_ID_HEAT_DISINFECT_PUBLISH_INTERVAL_OVERRIDE = 0xA021    # Heat disinfection data publish interval override request
-    MSG_ID_PRIMING_STATUS = 0x0037                              # The priming status
+    MSG_ID_PRIMING_STATUS = 0x43                                # The priming status
     MSG_ID_DG_SOFTWARE_RESET_REQUEST = 0xA022                   # DG reset request
     MSG_ID_DG_OPERATION_MODE_REQUEST = 0xA023                   # DG change operation mode request
     MSG_ID_CONCENTRATE_PUMP_TARGET_SPEED_OVERRIDE = 0xA024      # Concentrate pump target speed override request
@@ -198,13 +198,8 @@
 
     END_OF_MSG_IDS = 0xFFF3                                     # End of system message IDs
 
-    @classmethod
-    def has_value(cls, value):
-        return value in cls._value2member_map_
-
-
 @unique
-class RequestRejectReasons(Enum):
+class RequestRejectReasons(DialinEnum):
     REQUEST_REJECT_REASON_NONE = 0
     REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE = 1
     REQUEST_REJECT_REASON_TIMEOUT_WAITING_FOR_USER_CONFIRM = 2
@@ -230,11 +225,8 @@
     REQUEST_REJECT_REASON_SALINE_BOLUS_NOT_IN_PROGRESS = 22
     NUM_OF_REQUEST_REJECT_REASONS = 23
 
-    @classmethod
-    def has_value(cls, value):
-        return value in cls._value2member_map_
 
-class MsgFldPositions():
+class MsgFldPositions:
     # Generic response msg field byte positions (where 32-bit data fields are used)
     START_POS_FIELD_1 = DenaliMessage.PAYLOAD_START_INDEX
     END_POS_FIELD_1 = START_POS_FIELD_1 + 4
Index: dialin/hd/valves.py
===================================================================
diff -u -rd531ce09d0240e0ae542ea33cf8ebe4b8169825b -rcf56d42c5946ec79502d636db26f19fa4a1fdb64
--- dialin/hd/valves.py	(.../valves.py)	(revision d531ce09d0240e0ae542ea33cf8ebe4b8169825b)
+++ dialin/hd/valves.py	(.../valves.py)	(revision cf56d42c5946ec79502d636db26f19fa4a1fdb64)
@@ -7,29 +7,24 @@
 from ..utils.base import _AbstractSubSystem, _publish
 from ..common import MsgIds
 from logging import Logger
-import enum
+from ..utils.base import DialinEnum
 
-class ValvesEnum(enum.Enum):
+
+class ValvesEnum(DialinEnum):
     VDI = 0
     VDO = 1
     VBA = 2
     VBV = 3
 
-    @classmethod
-    def has_value(cls, value):
-        return value in cls._value2member_map_
 
-class ValvesPositions(enum.Enum):
+class ValvesPositions(DialinEnum):
     VALVE_POSITION_NOT_IN_POSITION = 0
     VALVE_POSITION_A_INSERT_EJECT  = 1
     VALVE_POSITION_B_OPEN          = 2
     VALVE_POSITION_C_CLOSE         = 3
 
-    @classmethod
-    def has_value(cls, value):
-        return value in cls._value2member_map_
 
-class ValvesStates(enum.Enum):
+class ValvesStates(DialinEnum):
     VALVE_STATE_WAIT_FOR_POST                = 0
     VALVE_STATE_HOMING_NOT_STARTED           = 1
     VALVE_STATE_HOMING_FIND_ENERGIZED_EDGE   = 2
@@ -38,17 +33,11 @@
     VALVE_STATE_IN_TRANSITION                = 5
     VALVE_STATE_IN_BYPASS_MODE               = 6
 
-    @classmethod
-    def has_value(cls, value):
-        return value in cls._value2member_map_
 
-class AirTrapState(enum.Enum):
+class AirTrapState(DialinEnum):
     STATE_CLOSED = 0
     STATE_OPEN   = 1
 
-    @classmethod
-    def has_value(cls, value):
-        return value in cls._value2member_map_
 
 class HDValves(_AbstractSubSystem):
     """