SPEL Vortceptor, Installation Manual

Page: 7 / 14

spel.com.au 7
E. WETWELL
INSTALLATION
WITH A
FIBREGLASS
UNDERGROUND
TANK
Do not backfill around the wetwell until the
concrete slab has hardened.
Add backfill in maximum 900mm lifts evenly
around the wetwell to avoid uneven backfill loads.
• A flexible joint on each connecting pipe is required
to relieve stresses from differential backfill
movement or soil consolidation. Backfill should be
added to the invert elevation of each connecting
pipe, the connection made and sealed, before
continuing to backfill.
WARNING
To prevent fire or explosion hazard, GA
recommends air driven tools whenever possible.
DO NOT use power tools where flammable vapors
or liquids exist. Also, when electric hand tools are
used, be aware of potential shock hazards.Wear
protective clothing and eye protection.
Wetwells may be a confined space. Follow proper
safety procedures.
CAUTION
Not using approved backfill material may result in
tank failure and environmental contamination.
If the wetwell is installed in the same excavation as an
underground fibreglass tank, the backfill around the
wetwell must also meet the tank backfill requirements
so as to not compromise the tank installation. Tank
backfill requirements are more restricted and strict
conformance to the tank backfill requirments in MAN
600 must be met for both the wetwell and tank.
F. PIPING
PENETRATIONS/
FITTINGS
CAUTION
Always wear safety glasses and protective
clothing when cutting on the wetwell, failure to do
so can result in personal injury.
• Pipe penetration cutouts should be round holes
and should be no larger than the pipe diameter
plus 25mm.
• Make cuts using a saw with a masonry or
diamond grit blade.
• Do not use an axe or other impact type tools.
• Accessories must be installed and used in strict
accordance with the manufacturer’s instructions.
• All piping must have a flexible connector installed
directly on the fitting or accessory to allow for a
minimum 15mm differential settlement between the
wetwell and the pipe.
If more than 15mm differential settlement is
expected, choose a flexible connector designed
for the expected settlement.
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G. INVERT
Invert specified by Certified Engineer. The invert may
be at any angle and may project up the wetwell any
distance.