Installation Instructions

BIODIFFUSER
™
LEACHING CHAMBER INSTALLATION INSTRUCTIONS
Before You Begin
The chambers may only be installed according to
state and/or local regulations. If unsure of the instal-
lation requirements for a particular site, contact the
local health department.
Like conventional systems, the soil and site condi-
tions must be approved prior to installation. Conduct
a thorough site evaluation to determine the proper
sizing and siting of the system before installation.
Excavating and Preparing the Site
As is the case with conventional systems, do not
install the systems in wet conditions or in overly
moist soils, as this causes machinery to smear the
soil.
1. Stake out the location of all trenches and lines.
Set the elevations of the tank, pipe, and trench
bottom.
2. Excavate and level trenches with proper center-
to-center separation. Verify that the trenches are
level or have the prescribed slope.
3. Rake the bottom and sides if smearing has
occurred while excavating. Remove any large
stones and other debris. Do not use the bucket
teeth to rake the trench bottom.
4. Verify that each trench is level using a level, tran-
sit, or laser.
Attaching the End Plates
1. With a hole-saw, cut an opening for the inlet pipe
using one of the pre-marked circles on the end
plate as a guide. Pre-marked circles allow for
4-inch SDR35, 4-inch SCH40 and 2-inch pressure
dosing pipe.
2. Attach the end plate to the inlet end of the cham-
ber by lining up the locking hubs with the cor-
responding chamber end. Apply firm pressure to
lock the hubs in place on one side of the chamber
and then the other.
3. In the inlet end of the end plate, insert the appro-
priate diameter inlet pipe into the previously drilled
hole. Fasten the pipe in place with a screw to
secure it to the end plate. Install a splash plate to
the base of the endcap under the pipe.
4. Attach a closed end plate onto the outlet end of
the chamber by snapping the end plate’s locking
hubs onto the chamber end. Do not cut an open-
ing on the closed or outlet end plate.
Installing the Chambers
1. Set the invert at the appropriate height from the bottom of the trench to
the bottom of the inlet. Invert height will vary depending on which end
plate is used. Precisely measure the invert on the end plate prior to set-
ting the invert height.
2. Place the first chamber with the open end plate at the beginning of the
trench.
3. Insert the inlet pipe into the end of the chamber.
4. Check the first-installed chamber to be sure it is level or has the pre-
scribed slope.
5. Secure the inlet pipe to the end plate with a screw.
6. Lift and place the end of the next chamber onto the previous one at a
45° angle. Line up the notches on the center end of the chamber and
lower it to the ground to engage the interlocks.
7. Continue interlocking the chambers until the trench is completed. The
last chamber in the trench should have a closed end plate. As the cham-
bers are installed, verify that they are level or have the prescribed slope.
8. To fill the sidewall area, start at the joints where one chamber interlocks
with another, and pull soil from the sides of the trench with a shovel.
Continue backfilling the area making sure the fill covers the louvers 1-2
inches.
9. Pack down the fill by walking along the edges of the trench and cham-
bers. This step is important for assuring structural support. Only com-
pact enough to match the natural in-place density of the surrounding
native soils.
10. Proceed to the next trench and begin with step one.
Covering the System
Before backfilling, the system must be inspected by a regulator or inspec-
tor as required by state and local codes.
1. Backfill the trench by pushing fill material over the units. Keep a mini-
mum of 12 inches of compacted cover over the chambers before driving
over the system.
Note: Do not drive over the system while backfilling in sand, since
sand does not give adequate support.
2. It is best to mound several extra inches of soil over the finish grade to
allow for settling. This also ensures that runoff water is diverted away
from the system. After the system is covered, the site should be seeded
or sodded to prevent erosion.
THE BIODIFFUSER
™
LEACHING CHAMBER
Leaching chambers have become the product of choice for leacheld applications over
conventional pipe and gravel systems. Their lightweight construction oers lower installed
costs and less intrusive installations.
FEATURES & BENEFITS
4 Injection-molded from
High Density Polyethylene
(HDPE) for lightweight and
sturdy design.
4 Designed to
accommodate both
gravity-fed and pressure-
dosed systems.
4 22° angel sections
available
4 A universal inlet/outlet
endcap.
4 Inspection/vent ports on
each chamber.
4 Quick installation
in trench or bed
applications.
4 Chambers can sustain
loads of 16,000 lbs
(H-10) per axle.
16” HC Chamber
BIO 2 Chamber
BIO 3 Chamber
11” Standard Chamber
No Stone or Gravel
Easily Transported
to Job Site
Quick Installation
UNIVERSAL
INLET/OUTLET ENDCAP
▫ Chambers
▫ End Plates
▫ PVC Pipe and
Couplings
(4-inch in diameter
for header and inlet
pipes)
▫ 4-inch Cap for
Inspection Port
▫ Backhoe
▫ Laser, Transit, or
Level
▫ Shovel and Rake
▫ Hole Saw/Router Bit
▫ Tape Measure
▫ Utility Knife
▫ Screw Gun
▫ Glue*
▫ Stakes (4)*
▫ String Line*
* Optional
Materials and Equipment Needed
These guidelines for construction machinery
must be followed during installation:
▫ Avoid direct contact with chambers when
using construction equipment. Chambers
require a 12-inch minimum of compacted
cover to support a wheel load rating of
16,000 lbs/axle or equivalent to an H-10
AASHTO load rating.
▫ Only drive across the trenches when nec-
essary. Never drive down the length of the
trenches.
▫ To avoid additional soil compaction, never
drive heavy vehicles over the completed
system.