7
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STEP 7
PLACE UNDERLAYMENT AND LINER
**Remove any sharp objects from the excavated area that
may damage the liner.
• Remove the AquaBlox
®
and Pondless
®
Waterfall Vault from
the basin (in step 6) in order to install the underlayment
and liner.
• Unfold the underlayment fabric and place into the
excavated basin. Starting from the bottom, remove the
slack from the underlayment, making sure it conforms into
all of the sides. Make sure you leave enough underlayment
to cover your stream and waterfall location
• Place the EPDM liner on top of the underlayment.The
installation process is the same as the underlayment,
starting at the bottom and contouring the liner up and out
of the basin.
• Try to get large folds out, the main goal is to have the
liner lying flat and going into all corners. Don’t try to get it
perfect, you will hide the liner with rocks and gravel later.
• Make sure the liner is high enough around the edges of
the basin. Problems can be fixed by readjusting the liner
into the excavation, backfilling (making the basin smaller)
in areas where there is not enough liner.
STEP 8
PLACE PONDLESS
®
WATERFALL PUMP VAULT AND
AQUABLOX
®
• Place Pondless
®
Waterfall Vault into its proper location.
• Install AquaBlox
®
in the basin, butting them tightly against
each other.
STEP 9
BACKFILL SIDES
• The excess excavation along the outside perimeter of
the basin can be backfilled once all of the AquaBlox
®
are
installed. Use sand or compactable free draining material
to back fill evenly on all sides to secure the AquaBlox
®
into
position.
