diff --git a/ReleaseNotes2_3.md b/ReleaseNotes2_3.md
index 9b8ab16..f0bae05 100644
--- a/ReleaseNotes2_3.md
+++ b/ReleaseNotes2_3.md
@@ -26,6 +26,8 @@ This document describes the changes and updates that have been made in version 2
 
  - `EN_VALVE_CURVE` can now be used with the `EN_getcurvetype` and `EN_setcurvetype` to get or set the valve position curve.
 
+ - `EN_VALVE_TYPE` can now be used with `EN_getlinkvalue` and `EN_setlinkvalue` to get and set a valve's type. This is the preferred way to change just a valve's type rather than using `EN_setlinktype`.
+
  - A new set of functions has been added to get information about upcoming time step events. Users will now see what type of event is going to cause the end of a time step to occur. See `EN_timetonextevent`.
 
  - A new set of functions has been added to allow users to set a reporting callback function. The user-supplied function will receive all output normally directed to the report file.
@@ -80,7 +82,7 @@ This document describes the changes and updates that have been made in version 2
 
  - Improved checks to prevent outflow from empty tanks or inflow to full (non-overflow) tanks, including the case where a link is connected to a pair of tanks, were added.
 
- - The `EN_INITSETTING` option in function `EN_getlinkvalue` will now return `EN_MISSING` for a valve whose initial status is fixed to `EN_OPEN` or `EN_CLOSED`.
+ - The `EN_INITSETTING` option in function `EN_setlinkvalue` will now save the setting value so that if a new simulation is begun or if  `EN_saveinpfile` is called the saved initial setting will remain in effect rather than whatever setting a simulation may have ended with.
 
  - A new error code `263 - node is not a tank` is returned when `EN_settankdata` or `EN_setnodevalue` attempts to set a tank-only parameter for a non-tank node.
 
diff --git a/doc/toolkit-topics.dox b/doc/toolkit-topics.dox
index 9b5adf3..5e20e5d 100644
--- a/doc/toolkit-topics.dox
+++ b/doc/toolkit-topics.dox
@@ -383,6 +383,7 @@ These are the toolkit's enumerated types whose members are used as function argu
 | 261  | Function call attempts to delete a node or link contained in a control |
 | 262  | Function call attempts to modify network structure while a solver is open |
 | 263  | Function call refers to node that is not a tank |
+| 264  | Function call refers to a link that is not a valve |
 | 299  | An invalid section keyword was detected in an input file |
 |  ||
 | 301  | Identical file names used for different types of files |
diff --git a/include/epanet2.bas b/include/epanet2.bas
index 2f4eb5f..32ab028 100644
--- a/include/epanet2.bas
+++ b/include/epanet2.bas
@@ -5,7 +5,7 @@ Attribute VB_Name = "Module1"
 'Declarations of functions in the EPANET PROGRAMMERs TOOLKIT
 '(EPANET2.DLL)
 
-'Last updated on 02/14/2025
+'Last updated on 04/23/2025
 
 ' These are codes used by the DLL functions
 Public Const EN_ELEVATION = 0     ' Node parameters
@@ -71,6 +71,7 @@ Public Const EN_PCV_CURVE = 25
 Public Const EN_LEAK_AREA = 26
 Public Const EN_LEAK_EXPAN = 27
 Public Const EN_LINK_LEAKAGE = 28
+Public Const EN_VALVE_TYPE = 29
 
 Public Const EN_DURATION = 0      ' Time parameters
 Public Const EN_HYDSTEP = 1
diff --git a/include/epanet2.cs b/include/epanet2.cs
index 7d1a12d..bb82d0b 100644
--- a/include/epanet2.cs
+++ b/include/epanet2.cs
@@ -3,7 +3,7 @@ using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 //epanet2.cs[By Oscar Vegas]
-//Last updated on 02/14/2025
+//Last updated on 04/23/2025
 
 //Declarations of functions in the EPANET PROGRAMMERs TOOLKIT
 //(EPANET2.DLL) for use with C#
@@ -84,6 +84,7 @@ namespace EpanetCSharpLibrary
         public const int EN_LEAK_AREA = 26;
         public const int EN_LEAK_EXPAN = 27;
         public const int EN_LINK_LEAKAGE = 28;
+        public const int EN_VALVE_TYPE = 29;
 
         public const int EN_DURATION = 0;      //Time parameters
         public const int EN_HYDSTEP = 1;
@@ -664,7 +665,7 @@ namespace EpanetCSharpLibrary
         public static extern int ENsetcontrol(int index, int type, int linkIndex, float setting, int nodeIndex, float level);
 
         [DllImport(EPANETDLL, EntryPoint = "ENgetcontrolenabled")]
-        public static extern int ENgetcontrolenabled(int index, int out_enabled);
+        public static extern int ENgetcontrolenabled(int index, ref int out_enabled);
 
         [DllImport(EPANETDLL, EntryPoint = "ENsetcontrolenabled")]
         public static extern int ENsetcontrolenabled(int index, int enabled);
@@ -714,7 +715,7 @@ namespace EpanetCSharpLibrary
         public static extern int ENsetelseaction(int ruleIndex, int actionIndex, int linkIndex, int status, float setting);
 
         [DllImport(EPANETDLL, EntryPoint = "ENgetruleenabled")]
-        public static extern int ENgetruleenabled(int index, int out_enabled);
+        public static extern int ENgetruleenabled(int index, ref int out_enabled);
 
         [DllImport(EPANETDLL, EntryPoint = "ENsetruleenabled")]
         public static extern int ENsetruleenabled(int index, int enabled);
diff --git a/include/epanet2.pas b/include/epanet2.pas
index a66a0bd..3f5d09c 100644
--- a/include/epanet2.pas
+++ b/include/epanet2.pas
@@ -3,7 +3,7 @@ unit epanet2;
 { Declarations of imported procedures from the EPANET PROGRAMMERs TOOLKIT }
 { (EPANET2.DLL) }
 
-{Last updated on 02/14/2025}
+{Last updated on 04/23/2025}
 
 interface
 
@@ -79,6 +79,7 @@ const
  EN_LEAK_AREA      = 26;
  EN_LEAK_EXPAN     = 27;
  EN_LINK_LEAKAGE   = 28;
+ EN_VALVE_TYPE     = 29;
  
  EN_DURATION     = 0;  { Time parameters }
  EN_HYDSTEP      = 1;
@@ -449,8 +450,8 @@ const
  function  ENdeletecontrol(Index: Integer): Integer; cdecl; external EpanetLib;
  function  ENgetcontrol(Index: Integer; var Ctype: Integer; var Link: Integer; var Setting: Single; var Node: Integer; var Level: Single): Integer; cdecl; external EpanetLib;
  function  ENsetcontrol(Index: Integer; Ctype: Integer; Link: Integer; Setting: Single; Node: Integer; Level: Single): Integer; cdecl; external EpanetLib;
- function  ENgetcontrolenabled(Index: Integer; out_enabled: Integer): Integer; cdecl; external EpanetLib;
- function  ENsetcontrolenabled(Index: Integer; var enabled: Integer): Integer; cdecl; external EpanetLib;
+ function  ENgetcontrolenabled(Index: Integer; var out_enabled: Integer): Integer; cdecl; external EpanetLib;
+ function  ENsetcontrolenabled(Index: Integer; enabled: Integer): Integer; cdecl; external EpanetLib;
 
  {Rule-Based Control Functions}
  function ENaddrule(Rule: PAnsiChar): Integer; cdecl; external EpanetLib;
@@ -475,7 +476,7 @@ const
           var Status: Integer; var Setting: Single): Integer; cdecl; external EpanetLib;
  function ENsetelseaction(RuleIndex: Integer; ActionIndex: Integer; LinkIndex: Integer;
           Status: Integer; Setting: Single): Integer; cdecl; external EpanetLib;
- function  ENgetruleenabled(Index: Integer; var enabled: Integer): Integer; cdecl; external EpanetLib;
+ function  ENgetruleenabled(Index: Integer; var out_enabled: Integer): Integer; cdecl; external EpanetLib;
  function  ENsetruleenabled(Index: Integer; enabled: Integer): Integer; cdecl; external EpanetLib;
 
 implementation
diff --git a/include/epanet2.vb b/include/epanet2.vb
index a73f28c..72770b9 100644
--- a/include/epanet2.vb
+++ b/include/epanet2.vb
@@ -4,7 +4,7 @@
 'Declarations of functions in the EPANET PROGRAMMERs TOOLKIT
 '(EPANET2.DLL) for use with VB.Net.
 
-'Last updated on 02/14/2025
+'Last updated on 04/23/2025
 
 Imports System.Runtime.InteropServices
 Imports System.Text
@@ -75,6 +75,7 @@ Public Const EN_PCV_CURVE = 25
 Public Const EN_LEAK_AREA = 26
 Public Const EN_LEAK_EXPAN = 27
 Public Const EN_LINK_LEAKAGE = 28
+Public Const EN_VALVE_TYPE = 29
 
 Public Const EN_DURATION = 0      ' Time parameters
 Public Const EN_HYDSTEP = 1
diff --git a/include/epanet2_2.h b/include/epanet2_2.h
index 2dcfc28..b527b98 100644
--- a/include/epanet2_2.h
+++ b/include/epanet2_2.h
@@ -11,7 +11,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 02/14/2025
+ Last Updated: 04/25/2025
  ******************************************************************************
  */
 
@@ -1263,6 +1263,8 @@ typedef struct Project *EN_Project;
   contain the link are deleted when the link's type is changed. If set to
   `EN_CONDITIONAL` then the type change is cancelled if the link appears in any
   control and error 261 is returned.
+  
+  To only change a valve's type (such as from PRV to PSV) use ::EN_setlinkvalue with property `EN_VALVE_TYPE` whose value is selected from the valves in @ref EN_LinkType.
   */
   int  DLLEXPORT EN_setlinktype(EN_Project ph, int *inout_index, int linkType, int actionCode);
 
diff --git a/include/epanet2_enums.h b/include/epanet2_enums.h
index f0c8864..a48171f 100644
--- a/include/epanet2_enums.h
+++ b/include/epanet2_enums.h
@@ -9,7 +9,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 03/22/2025
+ Last Updated: 04/23/2025
  ******************************************************************************
 */
 
@@ -103,7 +103,8 @@ typedef enum {
   EN_PCV_CURVE    = 25, //!< PCV loss coeff. curve index
   EN_LEAK_AREA    = 26, //!< Pipe leak area (sq mm per 100 length units)
   EN_LEAK_EXPAN   = 27, //!< Leak expansion rate (sq mm per unit of pressure head)
-  EN_LINK_LEAKAGE = 28  //!< Current leakage rate (read only)
+  EN_LINK_LEAKAGE = 28, //!< Current leakage rate (read only)
+  EN_VALVE_TYPE   = 29  //!< Type of valve (see @ref EN_LinkType)
 } EN_LinkProperty;
 
 /// Time parameters
diff --git a/src/epanet.c b/src/epanet.c
index c1bfbfe..1e8cc8f 100644
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -7,7 +7,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 04/19/2025
+ Last Updated: 04/23/2025
  ******************************************************************************
 */
 
@@ -4015,6 +4015,10 @@ int DLLEXPORT EN_getlinkvalue(EN_Project p, int index, int property, double *val
     case EN_LINK_LEAKAGE:
         v = findlinkleakage(p, index) * Ucf[FLOW];
         break;
+        
+    case EN_VALVE_TYPE:
+        if (Link[index].Type > PUMP) v = Link[index].Type;
+        break;
 
     default:
         return 251;
@@ -4060,7 +4064,7 @@ int DLLEXPORT EN_setlinkvalue(EN_Project p, int index, int property, double valu
     double *Ucf = p->Ucf;
     char s;
     double r;
-    int pumpIndex, patIndex, curveIndex;
+    int pumpIndex, patIndex, curveIndex, valveType;
 
     if (!p->Openflag) return 102;
     if (index <= 0 || index > net->Nlinks) return 204;
@@ -4268,6 +4272,14 @@ int DLLEXPORT EN_setlinkvalue(EN_Project p, int index, int property, double valu
         if (value < 0.0) return 211;
         Link[index].LeakExpan = value / Ucf[LENGTH];
         break;
+        
+    case EN_VALVE_TYPE:
+        if (hyd->OpenHflag || qual->OpenQflag) return 262;  //Solver is running
+        if (Link[index].Type <= PUMP) return 264;           //Link not a valve
+        valveType = ROUND(value);
+        if (valveType < PRV || valveType > PCV) return 213; //Invalid valve type
+        if (valveType == Link[index].Type) return 0;        //No type change
+        return changevalvetype(p, index, valveType);        //See project.c
 
     default:
         return 251;
diff --git a/src/errors.dat b/src/errors.dat
index 35ecf7b..65b9519 100644
--- a/src/errors.dat
+++ b/src/errors.dat
@@ -65,6 +65,7 @@ DAT(260,"attempt to delete node assigned as a Trace Node")
 DAT(261,"attempt to delete a node or link contained in a control")
 DAT(262,"attempt to modify network structure while solver is active")
 DAT(263,"node is not a tank")
+DAT(264,"link is not a valve")
 
 // File errors
 DAT(301,"identical file names")
diff --git a/src/funcs.h b/src/funcs.h
index 2fae94b..987534c 100755
--- a/src/funcs.h
+++ b/src/funcs.h
@@ -7,7 +7,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 02/14/2025
+ Last Updated: 04/23/2025
  ******************************************************************************
 */
 #ifndef FUNCS_H
@@ -29,6 +29,7 @@ int     buildadjlists(Network *);
 void    freeadjlists(Network *);
 
 int     incontrols(Project *, int, int);
+int     changevalvetype(Project *, int, int);
 int     valvecheck(Project *, int, int, int, int);
 int     unlinked(Project *);
 
diff --git a/src/project.c b/src/project.c
index b1c7261..1b50df4 100644
--- a/src/project.c
+++ b/src/project.c
@@ -7,7 +7,7 @@
  Authors:      see AUTHORS
  Copyright:    see AUTHORS
  License:      see LICENSE
- Last Updated: 02/19/2025
+ Last Updated: 04/23/2025
  ******************************************************************************
 */
 
@@ -754,7 +754,6 @@ int  buildadjlists(Network *net)
     return errcode;
 }
 
-
 void  freeadjlists(Network *net)
 /*
 **--------------------------------------------------------------
@@ -841,6 +840,66 @@ int incontrols(Project *pr, int objType, int index)
     return 0;
 }
 
+int changevalvetype(Project *pr, int index, int type)
+/*
+**--------------------------------------------------------------
+**  Input:   index = link index
+**           type = new valve type
+**  Output:  returns an error code
+**  Purpose: changes a valve's type
+**--------------------------------------------------------------
+*/
+{
+    Network *net = &pr->network;
+    Slink *link;
+    int errcode;
+    double setting;
+
+    // Check that new valve type has legal connections
+    link = &net->Link[index];
+    if (link->Type <= PUMP) return 264;
+    errcode = valvecheck(pr, index, type, link->N1, link->N2);
+    if (errcode) return errcode;
+    
+    // Preserve new type's setting in solver units
+    setting = link->InitSetting;
+    switch (link->Type)
+    {
+        case FCV:
+            setting *= pr->Ucf[FLOW];
+            break;
+        case PRV:
+        case PSV:
+        case PBV:
+            setting *= pr->Ucf[PRESSURE];
+            break;
+        case GPV:
+            setting = 0.0;
+            break;
+    }
+    switch (type)
+    {
+        case FCV:
+            setting /= pr->Ucf[FLOW];
+            break;
+        case PRV:
+        case PSV:
+        case PBV:
+            setting /= pr->Ucf[PRESSURE];
+            break;
+    }
+    
+    // Save setting
+    if (type == GPV) setting = 0.0;
+    if (type == PCV) setting = MIN(setting, 100.0);
+    link->Kc = setting;
+    link->InitSetting = setting;
+    
+    // Change valve link's type
+    link->Type = type;    
+    return 0;
+}
+    
 int valvecheck(Project *pr, int index, int type, int j1, int j2)
 /*
 **--------------------------------------------------------------
@@ -1365,7 +1424,6 @@ int setcomment(Network *network, int object, int index, const char *newcomment)
     }
 }
 
-
 int  gettag(Network *network, int object, int index, char *tag)
 //----------------------------------------------------------------
 //  Input:   object = a type of network object