4.
T
ANK
INS
TALLA
TION
Graf UK Ltd
8
TANK INSTALLATION
Assembling the telescopic dome shaft
The telescopic dome shaft enables infinite adaptation
of the tank to given site surfaces with earth coverage
of between 750mm and 950mm (Mini telescopic dome
shaft) or 750mm and 1050mm (Maxi telescopic dome
shaft).
For assembly purposes, the enclosed profile seal
(material EPDM) is inserted into the tank dome’s
sealing groove and is coated generously with soft
soap (do not use mineral oil-based lubricants, as
these attack the seal). The telescope is then greased,
inserted and aligned with the surface of the site.
Telescopic dome shaft on which persons may
walk
Important:
To prevent loads from being transferred
onto the tank, round-grain gravel
1
(max. grain size 10
to 20mm) is filled in in layers around the telescope
2
and is evenly compacted.
Damage to the tank dome
3
and telescope must be
avoided during this step. The cover is then positioned
and is sealed to prevent entry by children.
Tighten the
threaded connection on the cover so tightly that it
cannot be opened by a child!
Telescopic dome shaft over which passenger
cars may drive
If the tank is installed under areas used by passenger
cars, the collar area of the telescope
1
(colour
anthracite) must be supported with concrete
4
(load
class B25 = 250 kg/m²). The layer of concrete to be
installed must be at least 300mm wide and approx.
200 mm high all around. The minimum coverage above
the shoulder of the tank is at least 800mm (max.
1050mm with telescope, coverage up to max. 1200mm
possible with intermediate section).
Attention:
It is essential to use the cast telescopic
dome shaft (with class B cast cover).
4
4
2
3
1
1
3
2
