Installation Section Pump + Gravity Fed
We recommend that you read all the following sec-
tions, then select the appropriate installation sec-
tion.
• Preparation
• Installation Equipment
• Pump Fed installation Section
Preparation
A base level solid ground is required. It should be
a minimum of 1.2m x 1.0m, to allow easy access to
valves and for maintenance purposes.
Important:
The Nexus filter needs to be equally supported on
the three pairs of feet which are located under the
vessel. This is to prevent possible distortion when it is
full of water.
The best op-
tion for this
would be a
level 100 mm
thick concrete
plinth. Al-
though deck-
ing, paving
slabs or gravel
would be suf-
ficient as long
as the Nexus sits level and is not allowed to deflect
under the weight of the water.
Installation Equipment required or recommended:
1. Pond Pump, with a maximum actual flow rate
of no more than your Nexus model allows (see
pages 2 or 3 for specs).
2. Air Pump to power the kaldnes K1 Moving
Bed, see specifications for size of pump
required on page 6.
3. Length of hose or braided pipe (10 mm in
ner diameter) to connect the air pump to the
already positioned/supplied air ring.
Fig.6 Kaldnes K1 for bio chamber Nexus 200 = 50
litres Nexus 300 = 100 litres.
Fig.7 Inlet plate (Gravity fed only).
Fig.8 Weir plate, comes fitted (Nexus 200
pump fed only).
Fig.9 Standpipe (Nexus 300 pump fed only).
Fig.10 1.5 inch ball valve, for pressure inlet pump
fed only.
Fig.11 Two rubber connecting adapters, fitted
Pump Fed Systems
The nexus filtration system can be used in two ways
pump or gravity fed (fig.12 –pump fed)
Important: you must raise your pump off the pond
floor. It is incorrect practice to place a pond pump
on the base of any pond as failure in the filtera-
tion system. Pipe work or connectors could lead to
complete drainage of the pond. Therefore leave a
sufficient gap
( min. 12”) for
your Koi
Gravity Fed
Systems
In fig 13 you can
see a typical
set-up of a grav-
ity system.
WATER
Isolation
Va
lve (y)
Return to Pond
Alternative
Return to Pond
Vi
a Waterfall
Pond
Reducer
PurgeValve
(x)
Pump
LEVEL
Isolation
Va
lve
Pond
Reducer
Return to
Pond
Reducer
(If Required)
(If Required)
Pump
Raised off
Bottom
Min 12”
Nexus Eazy Rev. 1.04 page 4
Fig. 12
Fig. 13
(10 Seiten)
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