Techniques and methods used to clean sewer lines with water e.g.: water pumped in the form of a high velocity spray and water flowing by gravity or head pressure. Devices include high velocity jet cleaners, cleaning balls, and hinged disc cleaners.
See Hydraulic GradientAn imaginary line through the points to which water would rise in a series of vertical tubes connected to the pipe. In an open channel, the water surface itself is the hydraulic grade line..
An imaginary line through the points to which water would rise in a series of vertical tubes connected to the pipe. In an open channel, the water surface itself is the hydraulic grade line.
The area of the water prism in the pipe or channel divided by the wetted perimeter. Thus, for a round conduit flowing full or half full, the hydraulic radius is d/4, Another term sometimes used for this quantity is hydraulic mean depth.
The provision of an additional sewer which in conjunction with an existing sewer increases overall flow capacity.