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6. Installation
≥24
″
6.2.4 Connection of several tanks
Two or more tanks may be connected via the
designated areas near the bottom of the tanks by
means of manu
facturer’s special seals and (customer
furnished) basic drainage pipes. The apertures must
be drilled using the
manufacturer’s special crown bit in
the appropriate size. The distance between the tanks
should not be less than 24”/600 mm and the pipe must
extend at least 8”/200 mm into the tanks.
6.3 Insertion and filling
Lower the tank (or tanks) carefully into the
prepared trench. If the tank is inserted into
the water-table, fill it 1/3 full with water
before starting to fill in around it. If the tank
is entirely aboved the water-table, this step
may be omitted, however, partially filling
the tank prior to back-filling is highly
recommended.
Fill in the pit around the tank using pea
gravel (maximum grain size 8/16) in 1 ft (30
cm) increments until reaching about 6
″
(15cm) over the top of the tank. At that
point you may switch to soil and finish filling
the trench. Individual layers must be well
compacted
by
hand;
mechanical
compaction machines must not be used
under any circumstances.
6.4
Telescopic dome shaft (pedestrian)
Pedestrian load-bearing dome shaft can handle weights of up to 330
lbs/150 kg for short periods, and 110 lbs/50 kg for extended periods
of time.
Important:
To prevent loads from being transferred onto the tank,
pea gravel
(max. grain size 8/16) is filled in in layers around
the telescope
and is evenly compacted. Damage to the tank
dome
and telescope must be avoided during this step. The
cover is then positioned and closed to prevent entry by children.
Tighten the threaded connection on the cover tightly to
prevent unauthorized access.
6.5
Telescopic dome shaft (passenger vehicle load
bearing)
Vehicle load-bearing dome shafts are designed to bear a maximum
axle load of 4850 lbs.
If the tank is installed under areas used by passenger cars, the
collar area of the telescope
(black) must be supported with
concrete
(load class B25 = 0.356 psi/250 kg/m²). The layer of
concrete to be installed must be at least 12
″/300 mm wide and
approx. 8
″/200 mm high all around.
The minimum coverage above
the shoulder of the tank is at least 31.5
″/800 mm (max.
41.3
″/1050 mm with telescope, coverage up to max. 47.2″/1200
mm possible with intermediate section).
Attention:
Use the cast iron cover in all circumstances.
20″
