Water and Wastewater Terms Beginning T

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

total dynamic head (TDH)

When a pump is lifting or pumping water, the vertical distance (in feet or meters) from the elevation of the energy grade line on the suction side of the pump to the elevation of the energy grade line on the discharge side of the pump. The total dynamic head is the static head plus pipe friction losses.