diff --git a/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelPressureCalculator.cpp b/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelPressureCalculator.cpp
index f9e58f695b..5fc217dd4f 100644
--- a/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelPressureCalculator.cpp
+++ b/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelPressureCalculator.cpp
@@ -183,6 +183,7 @@ bool RimStimPlanModelPressureCalculator::extractValuesForProperty( RiaDefines::C
         values                    = results;
     }
 
+    bool useEqlnumForPressureInterpolation = stimPlanModel->stimPlanModelTemplate()->useEqlnumForPressureInterpolation();
     if ( curveProperty == RiaDefines::CurveProperty::INITIAL_PRESSURE )
     {
         auto hasMissingValues = []( const std::vector<double>& vec ) {
@@ -191,12 +192,12 @@ bool RimStimPlanModelPressureCalculator::extractValuesForProperty( RiaDefines::C
 
         if ( hasMissingValues( values ) )
         {
-            if ( !interpolateInitialPressureByEquilibrationRegion( curveProperty,
-                                                                   stimPlanModel,
-                                                                   timeStep,
-                                                                   measuredDepthValues,
-                                                                   tvDepthValues,
-                                                                   values ) )
+            if ( useEqlnumForPressureInterpolation && !interpolateInitialPressureByEquilibrationRegion( curveProperty,
+                                                                                                        stimPlanModel,
+                                                                                                        timeStep,
+                                                                                                        measuredDepthValues,
+                                                                                                        tvDepthValues,
+                                                                                                        values ) )
             {
                 RiaLogging::error( "Pressure interpolation by equilibration region failed." );
             }
@@ -210,7 +211,8 @@ bool RimStimPlanModelPressureCalculator::extractValuesForProperty( RiaDefines::C
     {
         std::vector<double> initialPressureValues = values;
         values.clear();
-        if ( !interpolatePressureDifferenceByEquilibrationRegion( curveProperty,
+        if ( useEqlnumForPressureInterpolation &&
+             !interpolatePressureDifferenceByEquilibrationRegion( curveProperty,
                                                                   stimPlanModel,
                                                                   timeStep,
                                                                   measuredDepthValues,
diff --git a/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.cpp b/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.cpp
index db77d61e6d..93036f9efa 100644
--- a/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.cpp
+++ b/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.cpp
@@ -95,6 +95,14 @@ RimStimPlanModelTemplate::RimStimPlanModelTemplate()
 
     CAF_PDM_InitScriptableFieldNoDefault( &m_staticEclipseCase, "StaticEclipseCase", "Static Case", "", "", "" );
 
+    CAF_PDM_InitField( &m_useEqlnumForPressureInterpolation,
+                       "UseEqlNumForPressureInterpolation",
+                       true,
+                       "Use EQLNUM For Pressure Interpolation",
+                       "",
+                       "",
+                       "" );
+
     CAF_PDM_InitScriptableField( &m_defaultPorosity,
                                  "DefaultPorosity",
                                  RiaDefines::defaultPorosity(),
@@ -312,6 +320,7 @@ void RimStimPlanModelTemplate::defineUiOrdering( QString uiConfigName, caf::PdmU
     pressureDataSourceGroup->add( &m_useTableForInitialPressure, { true, 2, 1 } );
     pressureDataSourceGroup->add( &m_editPressureTable, { false, 1, 0 } );
     pressureDataSourceGroup->add( &m_useTableForPressure );
+    pressureDataSourceGroup->add( &m_useEqlnumForPressureInterpolation );
     m_initialPressureEclipseCase.uiCapability()->setUiReadOnly( m_useTableForInitialPressure() );
 
     caf::PdmUiOrdering* defaultsGroup = uiOrdering.addNewGroup( "Defaults" );
@@ -912,3 +921,11 @@ bool RimStimPlanModelTemplate::usePressureTableForProperty( RiaDefines::CurvePro
     else
         return false;
 }
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+bool RimStimPlanModelTemplate::useEqlnumForPressureInterpolation() const
+{
+    return m_useEqlnumForPressureInterpolation;
+}
diff --git a/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.h b/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.h
index 6190efb451..250947215a 100644
--- a/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.h
+++ b/ApplicationLibCode/ProjectDataModel/StimPlanModel/RimStimPlanModelTemplate.h
@@ -118,6 +118,8 @@ public:
 
     bool usePressureTableForProperty( RiaDefines::CurveProperty curveProperty ) const;
 
+    bool useEqlnumForPressureInterpolation() const;
+
 protected:
     void defineUiOrdering( QString uiConfigName, caf::PdmUiOrdering& uiOrdering ) override;
 
@@ -148,6 +150,7 @@ private:
     caf::PdmPtrField<RimEclipseCase*>         m_initialPressureEclipseCase;
     caf::PdmField<bool>                       m_useTableForInitialPressure;
     caf::PdmField<bool>                       m_useTableForPressure;
+    caf::PdmField<bool>                       m_useEqlnumForPressureInterpolation;
     caf::PdmField<bool>                       m_editPressureTable;
     caf::PdmPtrField<RimEclipseCase*>         m_staticEclipseCase;
     caf::PdmField<double>                     m_defaultPorosity;