diff --git a/opm/simulators/wells/MultisegmentWellAssemble.cpp b/opm/simulators/wells/MultisegmentWellAssemble.cpp
index 3b16ef468..78cd2be51 100644
--- a/opm/simulators/wells/MultisegmentWellAssemble.cpp
+++ b/opm/simulators/wells/MultisegmentWellAssemble.cpp
@@ -172,6 +172,34 @@ assemblePressureLoss(const int seg,
     }
 }
 
+template<class FluidSystem, class Indices, class Scalar>
+void MultisegmentWellAssemble<FluidSystem,Indices,Scalar>::
+assemblePressureEq(const int seg,
+                   const int seg_upwind,
+                   const int outlet_segment_index,
+                   const EvalWell& pressure_equation,
+                   const EvalWell& outlet_pressure,
+                   Equations& eqns,
+                   bool wfrac,
+                   bool gfrac) const
+{
+    eqns.resWell_[seg][SPres] = pressure_equation.value();
+    eqns.duneD_[seg][seg][SPres][SPres] += pressure_equation.derivative(SPres + Indices::numEq);
+    eqns.duneD_[seg][seg][SPres][WQTotal] += pressure_equation.derivative(WQTotal + Indices::numEq);
+    if (wfrac) {
+        eqns.duneD_[seg][seg_upwind][SPres][WFrac] += pressure_equation.derivative(WFrac + Indices::numEq);
+    }
+    if (gfrac) {
+        eqns.duneD_[seg][seg_upwind][SPres][GFrac] += pressure_equation.derivative(GFrac + Indices::numEq);
+    }
+
+    // contribution from the outlet segment
+    eqns.resWell_[seg][SPres] -= outlet_pressure.value();
+    for (int pv_idx = 0; pv_idx < numWellEq; ++pv_idx) {
+        eqns.duneD_[seg][outlet_segment_index][SPres][pv_idx] = -outlet_pressure.derivative(pv_idx + Indices::numEq);
+    }
+}
+
 #define INSTANCE(...) \
 template class MultisegmentWellAssemble<BlackOilFluidSystem<double,BlackOilDefaultIndexTraits>,__VA_ARGS__,double>;
 
diff --git a/opm/simulators/wells/MultisegmentWellAssemble.hpp b/opm/simulators/wells/MultisegmentWellAssemble.hpp
index bc88d9247..4ded47a60 100644
--- a/opm/simulators/wells/MultisegmentWellAssemble.hpp
+++ b/opm/simulators/wells/MultisegmentWellAssemble.hpp
@@ -88,6 +88,16 @@ public:
                               const EvalWell& accelerationPressureLoss,
                               Equations& eqns) const;
 
+    //! \brief Assemble pressure terms.
+    void assemblePressureEq(const int seg,
+                            const int seg_upwind,
+                            const int outlet_segment_index,
+                            const EvalWell& pressure_equation,
+                            const EvalWell& outlet_pressure,
+                            Equations& eqns,
+                            bool wfrac = has_wfrac_variable,
+                            bool gfrac = has_gfrac_variable) const;
+
 private:
     const WellInterfaceIndices<FluidSystem,Indices,Scalar>& well_; //!< Reference to well
 };
diff --git a/opm/simulators/wells/MultisegmentWellEval.cpp b/opm/simulators/wells/MultisegmentWellEval.cpp
index a978216de..c8b4643fe 100644
--- a/opm/simulators/wells/MultisegmentWellEval.cpp
+++ b/opm/simulators/wells/MultisegmentWellEval.cpp
@@ -1180,25 +1180,14 @@ assembleDefaultPressureEq(const int seg,
         segments.pressure_drop_friction[seg] = friction_pressure_drop.value();
     }
 
-    linSys_.resWell_[seg][SPres] = pressure_equation.value();
-    const int seg_upwind = upwinding_segments_[seg];
-    linSys_.duneD_[seg][seg][SPres][SPres] += pressure_equation.derivative(SPres + Indices::numEq);
-    linSys_.duneD_[seg][seg][SPres][WQTotal] += pressure_equation.derivative(WQTotal + Indices::numEq);
-    if (has_wfrac_variable) {
-        linSys_.duneD_[seg][seg_upwind][SPres][WFrac] += pressure_equation.derivative(WFrac + Indices::numEq);
-    }
-    if (has_gfrac_variable) {
-        linSys_.duneD_[seg][seg_upwind][SPres][GFrac] += pressure_equation.derivative(GFrac + Indices::numEq);
-    }
-
     // contribution from the outlet segment
     const int outlet_segment_index = this->segmentNumberToIndex(this->segmentSet()[seg].outletSegment());
     const EvalWell outlet_pressure = getSegmentPressure(outlet_segment_index);
 
-    linSys_.resWell_[seg][SPres] -= outlet_pressure.value();
-    for (int pv_idx = 0; pv_idx < numWellEq; ++pv_idx) {
-        linSys_.duneD_[seg][outlet_segment_index][SPres][pv_idx] = -outlet_pressure.derivative(pv_idx + Indices::numEq);
-    }
+    const int seg_upwind = upwinding_segments_[seg];
+    MultisegmentWellAssemble<FluidSystem,Indices,Scalar>(baseif_).
+        assemblePressureEq(seg, seg_upwind, outlet_segment_index,
+                           pressure_equation, outlet_pressure, linSys_);
 
     if (this->accelerationalPressureLossConsidered()) {
         handleAccelerationPressureLoss(seg, well_state);