info@4rain.eu
www.4rain.eu
19 / 40
5. Installation and Assembly
5.4 Laying the connecting pipelines
All supply lines and overflow lines must have a gra-
dient of at least 1 % in the flow direction (possible
down-line settling must be considered). If the tank
overflow is connected to a public canal this must be
secured against backpressure in accordance with
DIN 1986 by means of a pump station (combined
sewer) or a backflow stopper (pure rainwater canal).
All intake, pressure and control lines must be led
through an empty conduit installed with a slope to-
wards the tank, without sagging and as well as pos-
sible along a straight line. Pipe elbows required must
be with 30° fittings.
Important: Connect the empty conduit to an open-
ing above the maximum water level.
6. Installing the Shaft Extension and Covering
The shaft extension can be shortened at the grooves. This allows earth coverage from 400 to 780 mm
above the tank shoulder.
To mount the shaft extension set the extension loosely onto the tank opening and then mount the
seal supplied . It is not necessary to attach the extension, as the shaft is held in position by the sur-
rounding soil after filling in the installation pit.
Then set on the cover and close off with child protection. Tighten the screw connections on the
cover firmly enough so that a child cannot open them!
To Next Page
Loading...