Little Giant SK2.5 Manual Del Usuario página 3

9. Using a sharp point, pierce through the liner into the remaining 8
holes, install the remaining eight 1/4"-20 bolts with washers, and
hand tighten them.
10. Hand-tighten all screws in a criss-cross pattern.
PUMP SIZING
For a 1,000 gallon pond use a 1,000 GPH rated pump. For a 5,000
gallon pond use a 5,000 GPH rated pump.
INSTALLING PUMP AND PLUMBING
Submersible pumps:
Route the discharge pipe through either side of the skimmer. The
skimmers are equipped with a hole saw template to locate the dis-
charge hole (Fig. 5). If using discharge kit DK-A or DK-B, use 2" flex-
ible hose or PVC pipe to connect the kit. If using discharge kit DK-C,
use 3" flexible hose or pipe.
Out-of-pond (non-submersible) pumps:
The skimmer can also be used with out-of-pond pumps that use a
suction line or a flooded suction with a check valve. The check valve
is needed to maintain water in the suction line. It is recommended to
also install a ball valve in-line next to the out-of-pond pump (on the
discharge side of the pump) to shut off the water supply during pump
servicing.
If installing a waterfall with the skimmer, it is always recommended
to install a check valve somewhere in-line between the skimmer and
waterfall. This prevents the waterfall vault from draining back into the
skimmer, drying out the filters and killing the bacteria when the pump
is off due to servicing or during a power outage.
OPTIONAL OVERFLOW LINE
In times of heavy rain, it is common for the pond level to rise and/or
overflow. The skimmer weir cover plate has two marks on the front to
indicate the proper water level (Fig. 4). It is possible that the skimmer
vault may not sit perfectly level after installation due to settling or other
conditions.
To determine the best location for the overflow line, find the center
seam (Fig. 8) on the outside back of the skimmer, then take two
measurements:
1. Measure 2" to the left or right of this seam (depending upon your
preference) and make a vertical mark.
2. On the outside of the skimmer's back wall, make a horizontal mark
1-3/4" above water level (if using a 2" grommet) or 2-1/4" above
water level (if using a 3" grommet), intersecting it with the vertical
mark. This will be the center point of the hole that will be drilled
(Fig. 8). This hole should be drilled only after the skimmer has been
installed and the pond water level has been established.
As a check for the measurement in step 2, make a reference mark
inside the skimmer on the back wall and place the grommet inside
against the skimmer wall. Try to line up the center of the 2" grommet
with the mark while checking the water level. If the water level is higher
than the inner diameter of the grommet, adjust the measurement until
the water level is approximately 1/2" below the inner diameter. If you
make this correction, transfer it to the outside before drilling.
Figure 8
Center seam
Jointure centrale
Costura central
If the measurements are acceptable and the grommet appears to be
in the proper location, drill the hole using a 3" hole saw (2" grom-
met) or 4" hole saw (3" grommet). The final overflow line will be set
approximately 1/2" above the water level. At this level, it should be in
the safe range to keep the water from overflowing except in times of
heavy rain.
Install the grommet as shown in Fig. 9. For easier installation, apply
the provided lubricant to the inside of the pipe grommet and the out-
side of the pipe to be installed.
Skimmer Net:
The skimmer is supplied with a net that is used to catch surface debris
from the pond. Inside the skimmer there are two side ledges and a
lower ledge that support the net. Remove this net periodically and
clean out the debris it has collected.
Biological Brushes:
The skimmer is supplied with biological brushes, which hang from a
support rod. The brushes offer increased surface area, enhancing the
growth of beneficial bacteria, and breaking up smaller debris. If the
brushes become clogged, gently wash them in a 5-gallon bucket of
pond water to get rid of the excess debris and then re-install in the
skimmer. Do not use tap water to rinse the brushes, as it may harm
the bacterial growth on the brushes.
OPTIONAL – Sand-Fill Plug (for lid):
For extra weight, you may add up to 10 pounds of sand to the lid
through the hole in the bottom. For easier installation, tilt the lid so the
sand enters freely. Use the included sand-fill plug to seal the hole.
Cleaning the Skimmer:
You may latch the weir gate closed while cleaning the skimmer vault
without removing water from the pond. NOTE: The weir gate should
be latched shut only for temporary skimmer maintenance. It is not
recommended to leave the weir gate latched shut for longer periods.
Be sure that you have access to the power supply to the pump before
following these steps:
After cleaning, replace the net and biological brushes. Skimmer
maintenance should take only a short time every 1 - 2 weeks. It is rec-
ommended to keep the skimmer maintenance time at a minimum to
keep the bacteria from being deprived of water for too long. If longer
maintenance time is required, put the biological brushes in a 5-gallon
bucket of pond water for temporary storage.
Figure 9
+ 1.75" (2" grommet •
œillet • arandela)
+ 2.25" (3" grommet •
œillet • arandela)
Water level
Niveau d'eau
Nivel de agua
SKIMMER MAINTENANCE
1. If you are using a bottom drain, close the gate valve.
2. Remove the net and biological brushes by lifting the support rod.
3. Move the weir gate up into the vertical position until the two side
latches lock into place. The water level inside the skimmer will
begin to drop.
4. Allow the pump to run until about 4 - 5" of water remain in the
skimmer. If the water is pumped down any lower it will introduce
air bubbles into the plumbing and may cause a future air-lock (or
prime loss). To remedy a pump air-lock, with the skimmer box
filled with water, raise the pump slightly and jiggle the pump until
the air bubbles leave the pump chamber.
Outside wall
of vault
Paroi extérieure
de la voûte
Pared externa
de la bastidor
Pipe grommet
Oeillet de tuyau
Tubería anillo protector
Inside wall
of vault
Paroi intérieure
de la voûte
Pared interna
de la bastidor
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