diff --git a/include/AbstractState.h b/include/AbstractState.h
index c8d378df..fed09f24 100644
--- a/include/AbstractState.h
+++ b/include/AbstractState.h
@@ -267,6 +267,10 @@ protected:
     virtual std::vector<long double> calc_mole_fractions_liquid(void){throw NotImplementedError("calc_mole_fractions_liquid is not implemented for this backend");};
     virtual std::vector<long double> calc_mole_fractions_vapor(void){throw NotImplementedError("calc_mole_fractions_vapor is not implemented for this backend");};
 
+    /// Get the minimum fraction (mole, mass, volume) for incompressible fluid
+    virtual long double calc_fraction_min(void){throw NotImplementedError("calc_fraction_min is not implemented for this backend");};
+    /// Get the maximum fraction (mole, mass, volume) for incompressible fluid
+    virtual long double calc_fraction_max(void){throw NotImplementedError("calc_fraction_max is not implemented for this backend");};
 public:
 
     AbstractState(){};
diff --git a/include/DataStructures.h b/include/DataStructures.h
index 6d883b3a..61285228 100644
--- a/include/DataStructures.h
+++ b/include/DataStructures.h
@@ -116,6 +116,10 @@ enum parameters{
     idBvirial_dT, 
     idCvirial_dT, 
     iZ,
+    
+    // Accessors for incompressibles
+    ifraction_min,
+    ifraction_max,
 
     // Environmental parameters
     iGWP20, ///< The 20-year global warming potential
diff --git a/src/AbstractState.cpp b/src/AbstractState.cpp
index 60714a1f..8cc16efa 100644
--- a/src/AbstractState.cpp
+++ b/src/AbstractState.cpp
@@ -195,7 +195,10 @@ double AbstractState::trivial_keyed_output(int key)
         return this->calc_GWP20();
     case iGWP500:
         return this->calc_GWP500();
-    
+    case ifraction_min:
+        return this->calc_fraction_min();
+    case ifraction_max:
+        return this->calc_fraction_max();
     default:
         throw ValueError(format("This input [%d: \"%s\"] is not valid for trivial_keyed_output",key,get_parameter_information(key,"short").c_str()));
     }
diff --git a/src/Backends/Incompressible/IncompressibleBackend.h b/src/Backends/Incompressible/IncompressibleBackend.h
index 2e268e9a..aa16d358 100644
--- a/src/Backends/Incompressible/IncompressibleBackend.h
+++ b/src/Backends/Incompressible/IncompressibleBackend.h
@@ -119,6 +119,9 @@ public:
     long double calc_cvmass(void){return fluid->cv(_T, _p, _fractions[0]);};
     long double calc_Tmax(void){return fluid->getTmax();};
     long double calc_Tmin(void){return fluid->getTmin();};
+    
+    long double calc_fraction_min(void){return fluid->getxmin();};
+    long double calc_fraction_max(void){return fluid->getxmax();};
 };
 
 } /* namespace CoolProp */
diff --git a/src/DataStructures.cpp b/src/DataStructures.cpp
index a3ab1607..6cc37e58 100644
--- a/src/DataStructures.cpp
+++ b/src/DataStructures.cpp
@@ -65,6 +65,8 @@ parameter_info parameter_info_list[] = {
     parameter_info(iP_max, "P_max","O","Pa","Maximum pressure limit",true),
     parameter_info(iP_critical, "p_critical","O","Pa","Pressure at the critical point",true),
     parameter_info(iP_triple, "p_triple","O","Pa","Pressure at the triple point (pure only)",true),
+    parameter_info(ifraction_min, "fraction_min","O","-","Fraction (mole, mass, volume) minimum value for incompressible solutions",true),
+    parameter_info(ifraction_max, "fraction_max","O","-","Fraction (mole, mass, volume) maximum value for incompressible solutions",true),
     
     parameter_info(ispeed_sound, "speed_of_sound","O","m/s","Speed of sound",false),
     parameter_info(iviscosity, "viscosity","O","Pa-s","Viscosity",false),