STEP 9
BACKFILLING
• Once the pump and plumbing installation is complete,
check again to make sure the AquaBasin
• Thoroughly backfill the sides with sand or dirt to prevent
any future shifting of the basin.
• After backfilling, check once again to ensure the basin
remains level from front-to-back and side-to-side.
STEP 10
UNDERLAYMENT & LINER INSTALLATION
• Once backfilled and level, it is time to add the
underlayment and liner. Refer to Figure 21 throughout the
process to ensure proper component placement.
Geotextile
Underlayment
Liner
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is level.
®
Figure 21
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• Remove any sharp objects from the location where the
liner will be placed to prevent damage during installation.
• Clear an approximately 3" (8 cm) deep gap between
the outside edge of the basin
and the soil along the two sides
opposite of the pump access.
Tuck one of the strips of geotextile
underlayment lengthwise into the
trough (Figure 22).
• This geotextile underlayment will
lay against the surrounding soil
to prevent soil built up for the
waterfall from eroding into the
basin (Figure 21 & 23).
• Next, position the pre-cut EPDM
liner on the basin, reaching from
one corner to the other
(Figure 21 & 24). The liner will
retain the water in the waterfall as
it travels from the spillway back
into the basin. Be sure to provide
enough slack for the liner to drape into the trough around
the perimeter of the basin (Figure 21).
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Figure 22
Figure 23
Figure 24
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