25
Step 7: After concrete is hardened on support columns, backfill about 3/4
way up tank in layered, compacted 6” lifts using sand, stone dust, pea
stone or equivalent material that form-fits into tank corrugations. Keep
backfill material damp to assure compact backfill.
Step 6: Fill tank with fresh water
to Low water level mark in all 3
chambers.
Note: Start with center chamber
and alternate chambers while
filling for evenly balanced fill.
Please note: To assure tank water
tightness, check in 24 hours to be sure
that the water level has not dropped.
Contact your distributor or Fuji Clean
USA if water level has dropped.
Step 5: Set tank
Note: It is acceptable to set tank
before setting and pouring
concrete columns.
Water
Check tank is level to 1/8” per 2 feet,
(10mm per 2 meter or 1/200), fore and
aft as well as side to side.
Step 6 continued: Set riser on the tank. Maximum riser height is 24-inches.
Water
