Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/GeneralPipingInputTest.cs
===================================================================
diff -u -r69f931d615d8cd933b51ce0b087c45db08a19a16 -r7d8579f17abe04611f9edd55afecb6b85605a04d
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/GeneralPipingInputTest.cs	(.../GeneralPipingInputTest.cs)	(revision 69f931d615d8cd933b51ce0b087c45db08a19a16)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/GeneralPipingInputTest.cs	(.../GeneralPipingInputTest.cs)	(revision 7d8579f17abe04611f9edd55afecb6b85605a04d)
@@ -19,6 +19,8 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
+using Core.Common.TestUtil;
 using NUnit.Framework;
 
 namespace Ringtoets.Piping.Data.Test
@@ -48,5 +50,34 @@
             Assert.AreEqual(2.08e-4, inputParameters.MeanDiameter70);
             Assert.AreEqual(0.3, inputParameters.SellmeijerReductionFactor);
         }
+
+        [Test]
+        [TestCase(double.NaN)]
+        [TestCase(-1)]
+        public void WaterVolumetricWeight_SetInvalidValue_ThrowArgumentException(double newValue)
+        {
+            // Setup
+            var inputParameters = new GeneralPipingInput();
+
+            // Call
+            TestDelegate test = () => inputParameters.WaterVolumetricWeight = newValue;
+
+            // Assert
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentException>(test, "De waarde moet een positief getal zijn.");
+        }
+
+        [Test]
+        public void WaterVolumetricWeight_SetValidValue_ValueSet()
+        {
+            // Setup
+            const double newValue = 5.69;
+            var inputParameters = new GeneralPipingInput();
+
+            // Call
+            inputParameters.WaterVolumetricWeight = newValue;
+
+            // Assert
+            Assert.AreEqual(newValue, inputParameters.WaterVolumetricWeight);
+        }
     }
 }
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