Glossary of Water and Wastewater Terms
A B C D E F G H I J K L M N O P Q R S T U V W Y Z5 random terms from our glossary
micronutrient
A trace element or an organic compound that is essential in tiny amounts for the growth of an organism.
manhole grade ring
A precast concrete ring 4 to 12 inches (10 to 30 centimeters) high that is placed on top of a manhole cone to raise the manhole cover frame flush with the surface grade. Sometimes called a spacer. Also called a grade ring.
rain
Particles of liquid water that have become too large to be held by the atmosphere. Their diameter generally is greater than 0.02 inch (0.5 mm) and they usually fall to the earth at velocities greater than 10 fps (3 m/s) in still air. Also see precipitation.
pig
A bullet-shaped device made of hard rubber or similar material, often called a poly pig. This device is used to clean pipes. It is inserted into the pipe, moves through the pipe under liquid or air pressure, and is removed from the end of the pipe.
uprights
Vertical shoring members, used in excavations, that may be solid (sheeting) or spaced a few feet (meters) apart to prevent cave-ins.
