diff --git a/opm/models/blackoil/blackoilbrinemodules.hh b/opm/models/blackoil/blackoilbrinemodules.hh
index 9a5432c59..91f7fcabb 100644
--- a/opm/models/blackoil/blackoilbrinemodules.hh
+++ b/opm/models/blackoil/blackoilbrinemodules.hh
@@ -38,7 +38,6 @@
 #include <opm/parser/eclipse/Deck/Deck.hpp>
 #include <opm/parser/eclipse/EclipseState/EclipseState.hpp>
 #include <opm/parser/eclipse/EclipseState/Tables/PvtwsaltTable.hpp>
-#include <opm/parser/eclipse/EclipseState/Tables/BrineDensityTable.hpp>
 #endif
 
 #include <opm/material/common/Valgrind.hpp>
@@ -125,8 +124,7 @@ public:
                 const auto& bdensityTable = bdensityTables[pvtRegionIdx];
                 const auto& pvtwsaltTable = pvtwsaltTables[pvtRegionIdx];
                 const auto& c = pvtwsaltTable.getSaltConcentrationColumn();
-                const auto& density = bdensityTable.getBrineDensityColumn();
-                bdensityTable_[pvtRegionIdx].setXYContainers(c, density);
+                bdensityTable_[pvtRegionIdx].setXYContainers(c, bdensityTable);
             }
         }
     }
diff --git a/opm/models/discretization/common/fvbasediscretization.hh b/opm/models/discretization/common/fvbasediscretization.hh
index e2b00b6e9..c65d4d2f0 100644
--- a/opm/models/discretization/common/fvbasediscretization.hh
+++ b/opm/models/discretization/common/fvbasediscretization.hh
@@ -67,11 +67,7 @@
 #include <dune/istl/bvector.hh>
 
 #if HAVE_DUNE_FEM
-#if DUNE_VERSION_NEWER(DUNE_FEM, 2,6)
 #include <dune/fem/space/common/adaptationmanager.hh>
-#else
-#include <dune/fem/space/common/adaptmanager.hh>
-#endif
 #include <dune/fem/space/common/restrictprolongtuple.hh>
 #include <dune/fem/function/blockvectorfunction.hh>
 #include <dune/fem/misc/capabilities.hh>
@@ -95,22 +91,12 @@ BEGIN_PROPERTIES
 SET_TYPE_PROP(FvBaseDiscretization, Simulator, Opm::Simulator<TypeTag>);
 
 //! Mapper for the grid view's vertices.
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
 SET_TYPE_PROP(FvBaseDiscretization, VertexMapper,
               Dune::MultipleCodimMultipleGeomTypeMapper<typename GET_PROP_TYPE(TypeTag, GridView)>);
-#else
-SET_TYPE_PROP(FvBaseDiscretization, VertexMapper,
-              Dune::MultipleCodimMultipleGeomTypeMapper<typename GET_PROP_TYPE(TypeTag, GridView), Dune::MCMGVertexLayout>);
-#endif
 
 //! Mapper for the grid view's elements.
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
 SET_TYPE_PROP(FvBaseDiscretization, ElementMapper,
               Dune::MultipleCodimMultipleGeomTypeMapper<typename GET_PROP_TYPE(TypeTag, GridView)>);
-#else
-SET_TYPE_PROP(FvBaseDiscretization, ElementMapper,
-              Dune::MultipleCodimMultipleGeomTypeMapper<typename GET_PROP_TYPE(TypeTag, GridView), Dune::MCMGElementLayout>);
-#endif
 
 //! marks the border indices (required for the algebraic overlap stuff)
 SET_PROP(FvBaseDiscretization, BorderListCreator)
@@ -380,13 +366,8 @@ public:
     FvBaseDiscretization(Simulator& simulator)
         : simulator_(simulator)
         , gridView_(simulator.gridView())
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
         , elementMapper_(gridView_, Dune::mcmgElementLayout())
         , vertexMapper_(gridView_, Dune::mcmgVertexLayout())
-#else
-        , elementMapper_(gridView_)
-        , vertexMapper_(gridView_)
-#endif
         , newtonMethod_(simulator)
         , localLinearizer_(ThreadManager::maxThreads())
         , linearizer_(new Linearizer())
diff --git a/opm/models/discretization/common/fvbaselinearizer.hh b/opm/models/discretization/common/fvbaselinearizer.hh
index 07690d169..4b4fa9a71 100644
--- a/opm/models/discretization/common/fvbaselinearizer.hh
+++ b/opm/models/discretization/common/fvbaselinearizer.hh
@@ -191,15 +191,6 @@ public:
             linearize_();
             succeeded = 1;
         }
-#if ! DUNE_VERSION_NEWER(DUNE_COMMON, 2,5)
-        catch (const Dune::Exception& e)
-        {
-            std::cout << "rank " << simulator_().gridView().comm().rank()
-                      << " caught an exception while linearizing:" << e.what()
-                      << "\n"  << std::flush;
-            succeeded = 0;
-        }
-#endif
         catch (const std::exception& e)
         {
             std::cout << "rank " << simulator_().gridView().comm().rank()
@@ -246,16 +237,6 @@ public:
                           << " caught an exception while linearizing:" << e.what()
                           << "\n"  << std::flush;
             }
-#if ! DUNE_VERSION_NEWER(DUNE_COMMON, 2,5)
-            catch (const Dune::Exception& e)
-            {
-                succeeded = false;
-
-                std::cout << "rank " << simulator_().gridView().comm().rank()
-                          << " caught an exception while linearizing:" << e.what()
-                          << "\n"  << std::flush;
-            }
-#endif
 
             succeeded = comm.min(succeeded);
 
diff --git a/opm/models/discretization/common/fvbaseproblem.hh b/opm/models/discretization/common/fvbaseproblem.hh
index be9d98c3d..b493f9397 100644
--- a/opm/models/discretization/common/fvbaseproblem.hh
+++ b/opm/models/discretization/common/fvbaseproblem.hh
@@ -111,13 +111,8 @@ public:
     FvBaseProblem(Simulator& simulator)
         : nextTimeStepSize_(0.0)
         , gridView_(simulator.gridView())
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
         , elementMapper_(gridView_, Dune::mcmgElementLayout())
         , vertexMapper_(gridView_, Dune::mcmgVertexLayout())
-#else
-        , elementMapper_(gridView_)
-        , vertexMapper_(gridView_)
-#endif
         , boundingBoxMin_(std::numeric_limits<double>::max())
         , boundingBoxMax_(-std::numeric_limits<double>::max())
         , simulator_(simulator)
diff --git a/opm/models/discretization/ecfv/ecfvstencil.hh b/opm/models/discretization/ecfv/ecfvstencil.hh
index b064a2c6b..4fdea53a7 100644
--- a/opm/models/discretization/ecfv/ecfvstencil.hh
+++ b/opm/models/discretization/ecfv/ecfvstencil.hh
@@ -63,11 +63,7 @@ class EcfvStencil
     typedef typename GridView::Intersection Intersection;
     typedef typename GridView::template Codim<0>::Entity Element;
 
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
     typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView> ElementMapper;
-#else
-    typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView, Dune::MCMGElementLayout> ElementMapper;
-#endif
 
     typedef Dune::FieldVector<CoordScalar, dimWorld> GlobalPosition;
 
diff --git a/opm/models/discretization/vcfv/vcfvstencil.hh b/opm/models/discretization/vcfv/vcfvstencil.hh
index 78684a2c6..45f108148 100644
--- a/opm/models/discretization/vcfv/vcfvstencil.hh
+++ b/opm/models/discretization/vcfv/vcfvstencil.hh
@@ -724,11 +724,7 @@ private:
 
 public:
     //! exported Mapper type
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
     typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView> Mapper;
-#else
-    typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView, Dune::MCMGVertexLayout> Mapper;
-#endif
 
     class ScvGeometry
     {
diff --git a/opm/models/io/dgfvanguard.hh b/opm/models/io/dgfvanguard.hh
index 4965ab407..15a9bd0e8 100644
--- a/opm/models/io/dgfvanguard.hh
+++ b/opm/models/io/dgfvanguard.hh
@@ -156,13 +156,8 @@ protected:
         LevelGridView gridView = dgfPointer->levelGridView(/*level=*/0);
         const unsigned edgeCodim = Grid::dimension - 1;
 
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
         typedef Dune::MultipleCodimMultipleGeomTypeMapper<LevelGridView> VertexMapper;
         VertexMapper vertexMapper(gridView, Dune::mcmgVertexLayout());
-#else
-        typedef Dune::MultipleCodimMultipleGeomTypeMapper<LevelGridView, Dune::MCMGVertexLayout> VertexMapper;
-        VertexMapper vertexMapper(gridView);
-#endif
 
         // first create a map of the dune to ART vertex indices
         auto eIt = gridView.template begin</*codim=*/0>();
diff --git a/opm/models/io/vtkmultiwriter.hh b/opm/models/io/vtkmultiwriter.hh
index 884efc7b7..835be58e9 100644
--- a/opm/models/io/vtkmultiwriter.hh
+++ b/opm/models/io/vtkmultiwriter.hh
@@ -96,13 +96,8 @@ class VtkMultiWriter : public BaseOutputWriter
 
     enum { dim = GridView::dimension };
 
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
     typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView> VertexMapper;
     typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView> ElementMapper;
-#else
-    typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView, Dune::MCMGElementLayout> ElementMapper;
-    typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView, Dune::MCMGVertexLayout> VertexMapper;
-#endif
 
 public:
     typedef BaseOutputWriter::Scalar Scalar;
@@ -113,11 +108,7 @@ public:
     typedef BaseOutputWriter::TensorBuffer TensorBuffer;
 
     typedef Dune::VTKWriter<GridView> VtkWriter;
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,5)
     typedef std::shared_ptr< Dune::VTKFunction< GridView > > FunctionPtr;
-#else
-    typedef typename VtkWriter::VTKFunctionPtr FunctionPtr;
-#endif
 
     VtkMultiWriter(bool asyncWriting,
                    const GridView& gridView,
@@ -125,13 +116,8 @@ public:
                    const std::string& simName = "",
                    std::string multiFileName = "")
         : gridView_(gridView)
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
         , elementMapper_(gridView, Dune::mcmgElementLayout())
         , vertexMapper_(gridView, Dune::mcmgVertexLayout())
-#else
-        , elementMapper_(gridView)
-        , vertexMapper_(gridView)
-#endif
         , curWriter_(nullptr)
         , curWriterNum_(0)
         , taskletRunner_(/*numThreads=*/asyncWriting?1:0)
diff --git a/opm/models/nonlinear/newtonmethod.hh b/opm/models/nonlinear/newtonmethod.hh
index 4a0938a8e..27649c11d 100644
--- a/opm/models/nonlinear/newtonmethod.hh
+++ b/opm/models/nonlinear/newtonmethod.hh
@@ -628,16 +628,6 @@ protected:
                       << " caught an exception while pre-processing the problem:" << e.what()
                       << "\n"  << std::flush;
         }
-#if ! DUNE_VERSION_NEWER(DUNE_COMMON, 2,5)
-        catch (const Dune::Exception& e)
-        {
-            succeeded = false;
-
-            std::cout << "rank " << simulator_.gridView().comm().rank()
-                      << " caught an exception while pre-processing the problem:" << e.what()
-                      << "\n"  << std::flush;
-        }
-#endif
 
         succeeded = comm.min(succeeded);
 
@@ -733,16 +723,6 @@ protected:
                           << " caught an exception while post processing an auxiliary module:" << e.what()
                           << "\n"  << std::flush;
             }
-#if ! DUNE_VERSION_NEWER(DUNE_COMMON, 2,5)
-            catch (const Dune::Exception& e)
-            {
-                succeeded = false;
-
-                std::cout << "rank " << simulator_.gridView().comm().rank()
-                          << " caught an exception while post processing an auxiliary module:" << e.what()
-                          << "\n"  << std::flush;
-            }
-#endif
 
             succeeded = comm.min(succeeded);
 
@@ -872,16 +852,6 @@ protected:
                       << " caught an exception while letting the problem post-process:" << e.what()
                       << "\n"  << std::flush;
         }
-#if ! DUNE_VERSION_NEWER(DUNE_COMMON, 2,5)
-        catch (const Dune::Exception& e)
-        {
-            succeeded = false;
-
-            std::cout << "rank " << simulator_.gridView().comm().rank()
-                      << " caught an exception while letting the problem post process:" << e.what()
-                      << "\n"  << std::flush;
-        }
-#endif
 
         succeeded = comm.min(succeeded);
 
diff --git a/opm/models/utils/pffgridvector.hh b/opm/models/utils/pffgridvector.hh
index 46e65757d..2a0f56359 100644
--- a/opm/models/utils/pffgridvector.hh
+++ b/opm/models/utils/pffgridvector.hh
@@ -49,20 +49,12 @@ class PffGridVector
 {
     typedef typename GridView::template Codim<0>::Entity Element;
 
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
     typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView> ElementMapper;
-#else
-    typedef Dune::MultipleCodimMultipleGeomTypeMapper<GridView, Dune::MCMGElementLayout> ElementMapper;
-#endif
 
 public:
     PffGridVector(const GridView& gridView, const DofMapper& dofMapper)
         : gridView_(gridView)
-#if DUNE_VERSION_NEWER(DUNE_GRID, 2,6)
         , elementMapper_(gridView_, Dune::mcmgElementLayout())
-#else
-        , elementMapper_(gridView_)
-#endif
         , dofMapper_(dofMapper)
     { }
 
diff --git a/opm/models/utils/start.hh b/opm/models/utils/start.hh
index ff9ddb595..92af8ab9c 100644
--- a/opm/models/utils/start.hh
+++ b/opm/models/utils/start.hh
@@ -401,19 +401,6 @@ static inline int start(int argc, char **argv,  bool registerParams=true)
         }
         return 0;
     }
-#if ! DUNE_VERSION_NEWER(DUNE_COMMON, 2,5)
-    catch (Dune::Exception& e)
-    {
-        if (myRank == 0) {
-            std::cout << "Dune reported an error: " << e.what() << std::endl  << std::flush;
-
-            std::cout << "Trying to reset TTY.\n";
-            resetTerminal_();
-        }
-
-        return 2;
-    }
-#endif
     catch (std::exception& e)
     {
         if (myRank == 0) {
diff --git a/opm/simulators/linalg/overlappingoperator.hh b/opm/simulators/linalg/overlappingoperator.hh
index d9a2a2d39..e4d686aba 100644
--- a/opm/simulators/linalg/overlappingoperator.hh
+++ b/opm/simulators/linalg/overlappingoperator.hh
@@ -50,14 +50,9 @@ public:
     OverlappingOperator(const OverlappingMatrix& A) : A_(A)
     {}
 
-#if DUNE_VERSION_NEWER(DUNE_ISTL, 2,6)
     //! the kind of computations supported by the operator. Either overlapping or non-overlapping
     Dune::SolverCategory::Category category() const override
     { return Dune::SolverCategory::overlapping; }
-#else
-    // redefine the category
-    enum { category = Dune::SolverCategory::overlapping };
-#endif
 
     //! apply operator to x:  \f$ y = A(x) \f$
     virtual void apply(const DomainVector& x, RangeVector& y) const override
diff --git a/opm/simulators/linalg/overlappingpreconditioner.hh b/opm/simulators/linalg/overlappingpreconditioner.hh
index 358665f07..402c99ef1 100644
--- a/opm/simulators/linalg/overlappingpreconditioner.hh
+++ b/opm/simulators/linalg/overlappingpreconditioner.hh
@@ -50,14 +50,9 @@ public:
     typedef typename SeqPreCond::domain_type domain_type;
     typedef typename SeqPreCond::range_type range_type;
 
-#if DUNE_VERSION_NEWER(DUNE_ISTL, 2,6)
     //! the kind of computations supported by the operator. Either overlapping or non-overlapping
     Dune::SolverCategory::Category category() const override
     { return Dune::SolverCategory::overlapping; }
-#else
-    // redefine the category
-    enum { category = Dune::SolverCategory::overlapping };
-#endif
 
     OverlappingPreconditioner(SeqPreCond& seqPreCond, const Overlap& overlap)
         : seqPreCond_(seqPreCond), overlap_(&overlap)
diff --git a/opm/simulators/linalg/overlappingscalarproduct.hh b/opm/simulators/linalg/overlappingscalarproduct.hh
index 8b4933f0b..0f68eb7fa 100644
--- a/opm/simulators/linalg/overlappingscalarproduct.hh
+++ b/opm/simulators/linalg/overlappingscalarproduct.hh
@@ -45,20 +45,11 @@ public:
     typedef typename OverlappingBlockVector::field_type field_type;
     typedef typename Dune::CollectiveCommunication<typename Dune::MPIHelper::MPICommunicator> CollectiveCommunication;
 
-#if DUNE_VERSION_NEWER(DUNE_ISTL, 2, 5)
     typedef typename Dune::ScalarProduct<OverlappingBlockVector>::real_type real_type;
-#else
-    typedef double real_type;
-#endif
 
-#if DUNE_VERSION_NEWER(DUNE_ISTL, 2,6)
     //! the kind of computations supported by the operator. Either overlapping or non-overlapping
     Dune::SolverCategory::Category category() const override
     { return Dune::SolverCategory::overlapping; }
-#else
-    // redefine the category
-    enum { category = Dune::SolverCategory::overlapping };
-#endif
 
     OverlappingScalarProduct(const Overlap& overlap)
         : overlap_(overlap), comm_( Dune::MPIHelper::getCollectiveCommunication() )