Use of pressure drop charts based on 60° F water will consistently overestimate the pressure drop in hydronic piping circuits because the water will usually be at higher temperatures.

Question

Quizplus · Accepted Answer

The viscosity of water decreases as temperature increases, leading to lower pressure drop. Therefore, using pressure drop charts based on 60° F water (which has a higher viscosity) will result in overestimation of pressure drop in hydronic piping circuits where the water is at a higher temperature.

Use of Pressure Drop Charts Based on 60° F Water