Water and Wastewater Terms Beginning D

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

drop manhole

A main line or house service line lateral entering a manhole at a higher elevation than the main flow line or channel. If the higher elevation flow is routed to the main manhole channel outside of the manhole, it is called an outside drop. If the flow is routed down through the manhole barrel, the pipe down to the manhole channel is called an inside drop.