Index: Ringtoets/Migration/src/Ringtoets.Migration.Core/EmbeddedResources/Migration_17.3_18.1.sql
===================================================================
diff -u -ree67290cbfd58a5022cb117dc9fd9a4a457b1da8 -rd793636169dd75ec39000f5a779533e434e18d11
--- Ringtoets/Migration/src/Ringtoets.Migration.Core/EmbeddedResources/Migration_17.3_18.1.sql	(.../Migration_17.3_18.1.sql)	(revision ee67290cbfd58a5022cb117dc9fd9a4a457b1da8)
+++ Ringtoets/Migration/src/Ringtoets.Migration.Core/EmbeddedResources/Migration_17.3_18.1.sql	(.../Migration_17.3_18.1.sql)	(revision d793636169dd75ec39000f5a779533e434e18d11)
@@ -732,7 +732,14 @@
 	1
 FROM [SOURCEPROJECT].MicrostabilitySectionResultEntity;
 INSERT INTO PipingCalculationEntity SELECT * FROM [SOURCEPROJECT].PipingCalculationEntity;
-INSERT INTO PipingCalculationOutputEntity SELECT * FROM [SOURCEPROJECT].PipingCalculationOutputEntity;
+INSERT INTO PipingCalculationOutputEntity 
+SELECT *
+	FROM [SOURCEPROJECT].PipingCalculationOutputEntity
+	WHERE PipingCalculationEntityId IN (
+		SELECT PipingCalculationEntityId 
+		FROM [SOURCEPROJECT].PipingCalculationEntity
+		WHERE UseAssessmentLevelManualInput IS 1
+	);
 INSERT INTO PipingCharacteristicPointEntity SELECT * FROM [SOURCEPROJECT].PipingCharacteristicPointEntity;
 INSERT INTO PipingFailureMechanismMetaEntity SELECT * FROM [SOURCEPROJECT].PipingFailureMechanismMetaEntity;
 INSERT INTO PipingSectionResultEntity (
Index: Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs
===================================================================
diff -u -ree67290cbfd58a5022cb117dc9fd9a4a457b1da8 -rd793636169dd75ec39000f5a779533e434e18d11
--- Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs	(.../MigrationTo181IntegrationTest.cs)	(revision ee67290cbfd58a5022cb117dc9fd9a4a457b1da8)
+++ Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs	(.../MigrationTo181IntegrationTest.cs)	(revision d793636169dd75ec39000f5a779533e434e18d11)
@@ -85,7 +85,9 @@
                     AssertHydraulicBoundaryLocationsOnAssessmentSection(reader, sourceFilePath);
                     AssertHydraulicBoundaryLocationsOnGrassCoverErosionOutwardsFailureMechanism(reader, sourceFilePath);
                     AssertFailureMechanisms(reader, sourceFilePath);
+
                     AssertFailureMechanismRelatedOutput(reader);
+                    AssertPipingOutput(reader, sourceFilePath);
 
                     AssertPipingSoilLayers(reader);
                     AssertStabilityStoneCoverFailureMechanism(reader);
@@ -444,7 +446,6 @@
                 "MacroStabilityOutwardsSectionResultEntity",
                 "MicrostabilitySectionResultEntity",
                 "PipingCalculationEntity",
-                "PipingCalculationOutputEntity",
                 "PipingCharacteristicPointEntity",
                 "PipingFailureMechanismMetaEntity",
                 "PipingSectionResultEntity",
@@ -1035,6 +1036,22 @@
             }
         }
 
+        private static void AssertPipingOutput(MigratedDatabaseReader reader, string sourceFilePath)
+        {
+            string validateOutputCount =
+                $"ATTACH DATABASE \"{sourceFilePath}\" AS SOURCEPROJECT; " +
+                "SELECT COUNT() = " +
+                "( " +
+                "SELECT COUNT() " +
+                "FROM [SOURCEPROJECT].PipingCalculationOutputEntity " +
+                "JOIN [SOURCEPROJECT].PipingCalculationEntity USING(PipingCalculationEntityId) " +
+                "WHERE [UseAssessmentLevelManualInput] = 1 " +
+                ") " +
+                "FROM PipingCalculationOutputEntity;" +
+                "DETACH DATABASE SOURCEPROJECT;";
+            reader.AssertReturnedDataIsValid(validateOutputCount);
+        }
+
         #region Dune Locations
 
         /// <summary>