diff --git a/include/epanet2.h b/include/epanet2.h
index fc99a067..1aaa655a 100644
--- a/include/epanet2.h
+++ b/include/epanet2.h
@@ -320,6 +320,10 @@ extern "C" {
   int DLLEXPORT ENgetheadcurveindex(int linkIndex, int *curveIndex);
 
   int DLLEXPORT ENsetheadcurveindex(int linkIndex, int curveIndex);
+  
+  int DLLEXPORT ENgetefficiencycurveindex(int linkIndex, int *curveIndex);
+
+  int DLLEXPORT ENsetefficiencycurveindex(int linkIndex, int curveIndex);
 
 /********************************************************************
 
diff --git a/include/epanet2_2.h b/include/epanet2_2.h
index 81f2f9f0..1fb62b93 100644
--- a/include/epanet2_2.h
+++ b/include/epanet2_2.h
@@ -1371,6 +1371,24 @@ typedef struct Project *EN_Project;
   */
   int  DLLEXPORT EN_setheadcurveindex(EN_Project ph, int linkIndex, int curveIndex);
 
+  /**
+  @brief Retrieves the curve assigned to a pump's efficiency curve.
+  @param ph an EPANET project handle.
+  @param linkIndex the index of a pump link (starting from 1).
+  @param[out] curveIndex the index of the curve assigned to the pump's efficiency curve.
+  @return an error code.
+  */
+  int  DLLEXPORT EN_getefficiencycurveindex(EN_Project ph, int linkIndex, int *out_curveIndex);
+
+  /**
+  @brief Assigns a curve to a pump's efficiency curve.
+  @param ph an EPANET project handle.
+  @param linkIndex the index of a pump link (starting from 1).
+  @param curveIndex the index of a curve to be assigned as the pump's efficiency curve.
+  @return an error code.
+  */
+  int  DLLEXPORT EN_setefficiencycurveindex(EN_Project ph, int linkIndex, int curveIndex);
+
   /********************************************************************
 
   Time Pattern Functions
diff --git a/src/epanet.c b/src/epanet.c
index 71cad747..723d6b4e 100644
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -4460,6 +4460,59 @@ int DLLEXPORT EN_setheadcurveindex(EN_Project p, int linkIndex, int curveIndex)
     return 0;
 }
 
+int DLLEXPORT EN_getefficiencycurveindex(EN_Project p, int linkIndex, int *curveIndex)
+/*----------------------------------------------------------------
+**  Input:   linkIndex = index of a pump link
+**  Output:  curveIndex = index of a pump's efficiency curve
+**  Returns: error code
+**  Purpose: retrieves the index of a pump's efficiency curve
+**----------------------------------------------------------------
+*/
+{
+    Network *net = &p->network;
+
+    Slink *Link = net->Link;
+    Spump *Pump = net->Pump;
+    const int Nlinks = net->Nlinks;
+
+    *curveIndex = 0;
+    if (!p->Openflag) return 102;
+    if (linkIndex < 1 || linkIndex > Nlinks) return 204;
+    if (PUMP != Link[linkIndex].Type) return 216;
+    *curveIndex = Pump[findpump(net, linkIndex)].Ecurve;
+    return 0;
+}
+
+int DLLEXPORT EN_setefficiencycurveindex(EN_Project p, int linkIndex, int curveIndex)
+/*----------------------------------------------------------------
+**  Input:   linkIndex = index of a pump link
+**           curveIndex = index of a curve
+**  Output:  none
+**  Returns: error code
+**  Purpose: assigns a new efficiency curve to a pump
+**----------------------------------------------------------------
+*/
+{
+    Network *net = &p->network;
+
+    int pumpIndex;
+    int err = 0;
+    Spump *pump;
+
+    // Check for valid parameters
+    if (!p->Openflag) return 102;
+    if (linkIndex < 1 || linkIndex > net->Nlinks) return 204;
+    if (PUMP != net->Link[linkIndex].Type) return 0;
+    if (curveIndex < 0 || curveIndex > net->Ncurves) return 206;
+
+    // Assign the new curve to the pump
+    pumpIndex = findpump(net, linkIndex);
+    pump = &net->Pump[pumpIndex];
+    pump->Ecurve = curveIndex;
+    net->Link[linkIndex].Km = 0.0;
+    return 0;
+}
+
 /********************************************************************
 
     Time Pattern Functions
diff --git a/src/epanet2.c b/src/epanet2.c
index 435a571c..8776885b 100644
--- a/src/epanet2.c
+++ b/src/epanet2.c
@@ -603,6 +603,16 @@ int DLLEXPORT ENsetheadcurveindex(int linkIndex, int curveIndex)
     return EN_setheadcurveindex(_defaultProject, linkIndex, curveIndex);
 }
 
+int DLLEXPORT ENgetefficiencycurveindex(int linkIndex, int *curveIndex)
+{
+    return EN_getefficiencycurveindex(_defaultProject, linkIndex, curveIndex);
+}
+
+int DLLEXPORT ENsetefficiencycurveindex(int linkIndex, int curveIndex)
+{
+    return EN_setefficiencycurveindex(_defaultProject, linkIndex, curveIndex);
+}
+
 /********************************************************************
 
     Time Pattern Functions
diff --git a/tests/test_pattern.cpp b/tests/test_pattern.cpp
index 4d98ba37..72c9e98a 100644
--- a/tests/test_pattern.cpp
+++ b/tests/test_pattern.cpp
@@ -167,6 +167,25 @@ BOOST_AUTO_TEST_CASE(test_add_set)
     BOOST_REQUIRE(x == x3[0]);
     BOOST_REQUIRE(y == y3[0]);
 
+    // Add an efficiency curve to the pump
+    double xe[] = {0.0, 1.0};
+    double ye[] = {100.0, 30.0};
+    char eCurve[] = "ECurve";
+    EN_addcurve(ph, eCurve);
+    EN_setcurve(ph, 3, xe, ye, 2);
+    EN_getcurveindex(ph, eCurve, &curveIdx);
+    EN_setefficiencycurveindex(ph, pumpIdx, curveIdx);
+
+    // Check that pump's efficiency curve is eCurve
+    EN_getefficiencycurveindex(ph, pumpIdx, &curveIdx);
+    EN_getcurveid(ph, curveIdx, curveID);
+    BOOST_REQUIRE(strcmp(curveID, eCurve) == 0);
+
+    // And that it contains the correct data
+    EN_getcurvevalue(ph, curveIdx, 1, &x, &y);
+    BOOST_REQUIRE(x == xe[0]);
+    BOOST_REQUIRE(y == ye[0]);
+
     EN_close(ph);
     EN_deleteproject(ph);
 }