Water and Wastewater Terms Beginning G

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

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 manhole grade ring.