And corrected.Water density changes much more than I thought with reguard to temperature.First,liquid water is not most dense at 39.2.On the chart I link here it clearly shows a higher density right up to the freezing point.At 70 degrees it has a viscosity of 1 and at 39 degrees it is about a 1.55.Quite more significant than I realized.
http://www.engineeringtoolbox.com/wa...ity-d_596.html