Laying The Connecting Pipelines; Installing The Shaft Extension And Covering - 4rain FLAT 1.500 L Manual De Instalación, Montaje Y Mantenimiento

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.

Cover
 Shaft extension
 Seal

FLAT flat tank
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
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
cover firmly enough so that a child cannot open them!
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5. Installation and Assembly

Installing the Shaft Extension and Covering


set the extension loosely onto the tank opening
and close off with child protection. Tighten the screw connections on the
19 / 40

and then mount the
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