Index: Ringtoets/Piping/src/Ringtoets.Piping.Forms/NodePresenters/PipingFailureMechanismNodePresenter.cs
===================================================================
diff -u -ra102fea862becd91b612d707102eea3fa41a8c67 -r2eb13d54b332fd4bdea7d44b35a509cd843c70f7
--- Ringtoets/Piping/src/Ringtoets.Piping.Forms/NodePresenters/PipingFailureMechanismNodePresenter.cs	(.../PipingFailureMechanismNodePresenter.cs)	(revision a102fea862becd91b612d707102eea3fa41a8c67)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Forms/NodePresenters/PipingFailureMechanismNodePresenter.cs	(.../PipingFailureMechanismNodePresenter.cs)	(revision 2eb13d54b332fd4bdea7d44b35a509cd843c70f7)
@@ -130,6 +130,7 @@
                                      foreach (var calc in failureMechanism.Calculations)
                                      {
                                          calc.ClearOutput();
+                                         calc.NotifyObservers();
                                      }
                                  });
 
Index: Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/NodePresenters/PipingCalculationInputsNodePresenterTest.cs
===================================================================
diff -u -ra102fea862becd91b612d707102eea3fa41a8c67 -r2eb13d54b332fd4bdea7d44b35a509cd843c70f7
--- Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/NodePresenters/PipingCalculationInputsNodePresenterTest.cs	(.../PipingCalculationInputsNodePresenterTest.cs)	(revision a102fea862becd91b612d707102eea3fa41a8c67)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/NodePresenters/PipingCalculationInputsNodePresenterTest.cs	(.../PipingCalculationInputsNodePresenterTest.cs)	(revision 2eb13d54b332fd4bdea7d44b35a509cd843c70f7)
@@ -587,5 +587,30 @@
             Assert.IsNotNull(pipingData.Output);
             mockRepository.VerifyAll();
         }
+
+        [Test]
+        public void GivenPipingDataWithOutput_WhenClearingOutputFromContextMenu_ThenPipingDataOutputClearedAndNotified()
+        {
+            // Given
+            int clearOutputItemPosition = 2;
+            var pipingData = new PipingData();
+            var observer = mockRepository.StrictMock<IObserver>();
+            observer.Expect(o => o.UpdateObserver());
+            pipingData.Output = new TestPipingOutput();
+            pipingData.Attach(observer);
+
+            mockRepository.ReplayAll();
+
+            var nodePresenter = new PipingCalculationInputsNodePresenter();
+            var contextMenuAdapter = nodePresenter.GetContextMenu(null, new PipingCalculationInputs { PipingData = pipingData });
+
+            // When
+            contextMenuAdapter.Items[clearOutputItemPosition].PerformClick();
+
+            // Then
+            Assert.IsFalse(pipingData.HasOutput);
+
+            mockRepository.VerifyAll();
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/NodePresenters/PipingFailureMechanismNodePresenterTest.cs
===================================================================
diff -u -ra102fea862becd91b612d707102eea3fa41a8c67 -r2eb13d54b332fd4bdea7d44b35a509cd843c70f7
--- Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/NodePresenters/PipingFailureMechanismNodePresenterTest.cs	(.../PipingFailureMechanismNodePresenterTest.cs)	(revision a102fea862becd91b612d707102eea3fa41a8c67)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/NodePresenters/PipingFailureMechanismNodePresenterTest.cs	(.../PipingFailureMechanismNodePresenterTest.cs)	(revision 2eb13d54b332fd4bdea7d44b35a509cd843c70f7)
@@ -480,5 +480,41 @@
             Assert.IsFalse(removalSuccesful);
             Assert.AreSame(expectedFailureMechanism, project.PipingFailureMechanism);
         }
+
+        [Test]
+        public void GivenMultiplePipingDataWithOutput_WhenClearingOutputFromContextMenu_ThenPipingDataOutputCleared()
+        {
+            // Given
+            int clearOutputItemPosition = 2;
+
+            var mocks = new MockRepository();
+            var observer = mocks.StrictMock<IObserver>();
+            observer.Expect(o => o.UpdateObserver()).Repeat.Twice();
+
+            var dataMock = mocks.StrictMock<PipingFailureMechanism>();
+            dataMock.Calculations.Add(new PipingData
+            {
+                Output = new TestPipingOutput()
+            });
+            dataMock.Calculations.Add(new PipingData
+            {
+                Output = new TestPipingOutput()
+            });
+            dataMock.Calculations.ElementAt(0).Attach(observer);
+            dataMock.Calculations.ElementAt(1).Attach(observer);
+
+            var nodePresenter = new PipingFailureMechanismNodePresenter();
+            var contextMenuAdapter = nodePresenter.GetContextMenu(null, dataMock);
+
+            mocks.ReplayAll();
+
+            // When
+            contextMenuAdapter.Items[clearOutputItemPosition].PerformClick();
+
+            // Then
+            CollectionAssert.IsEmpty(dataMock.Calculations.Where(c => c.HasOutput));
+
+            mocks.VerifyAll();
+        }
     }
 }
\ No newline at end of file