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
colloids (KALL-loids)
Very small, finely divided solids (particles that do not dissolve) that remain dispersed in a liquid for a long time due to their small size and electrical charge. When most of the particles in water have a negative electrical charge, they tend to repel each other. This repulsion prevents the particles from clumping together, becoming heavier, and settling out.
house connection
See building sewer.
pole shader
A copper bar circling the laminated iron core inside the coil of a magnetic starter.
operating pressure differential
The operating pressure range for a hydropneumatic system. For example, when the pressure drops below 40 pounds per square inch (psi) in a system designed to operate between 40 psi and 60 psi, the pump will come on and stay on until the pressure builds up to 60 psi. When the pressure reaches 60 psi the pump will shut off. The operating pressure differential in this example is 20 psi.
stormwater runoff
The portion of stormwater that remains on the surface and generates overland flow.
