2018 Indiana Design and Installation Manual 7 www.eljen.com
1.1 System Design
FIGURE 2: SEQUENTIAL LOADING DIAGRAM
GSF MODULES
LOWEST TRENCH
GSF MODULES
LOWER TRENCHES
GSF MODULES
UPPER MOST TRENCH
THE LOWEST TRENCH ALONG THE SLOPE
DOES NOT REQUIRE A DISTRIBUTION BOX, ALTHOUGH
RECOMMENDED WITH COMMERCIAL DESIGNS
FOR INSPECTION AND OBSERVATION
THE INVER OF DIAL-A-FLOW "B"
IS SET AT THE 9:00 POSITION
DIAL-A-FLOW FITTINGS ARE NOT INSTALLED
ON THE OVER FLOW LINE FROM A UPPER
DISTRIBUTION BOX
OR THE DISTRIBUTION PIPE
LEADING TO THE GSF MODULES
B
A
DIAL-A-FLOW
INVERT SETTING
THE INVER OF DIAL-A-FLOW "B"
IS SET AT THE 9:00 POSITION
DIAL-A-FLOW FITTINGS ARE NOT
INSTALLED ON THE OVER FLOW LINE
FROM THE SEPTIC TANK
OR THE DISTRIBUTION PIPE
LEADING TO THE GSF MODULES
B
A
B
A
1.1.5 SYSTEM GUIDANCE The chart below directs you to the appropriate section of this manual for the design
and installation of the system.
TABLE 2: SYSTEM GUIDANCE CHART
Minimum Depth of
Installation from Existing
Grade
Number of
Laterals per
Excavation
Slope Section Page
10 Inches or Greater
Single 0 – 15%
Subsurface Trench and
Sin
le Lateral Bed
11
Multiple
0.0 - 0.5% Subsurface Bed 15
0.5 – 15% Sloped Subsurface Bed 21
Existing Grade
Single 0 - 6% Elevated Sand Mound 28
Multiple
0.0 - 0.5% Above Grade Bed 35
0.5 – 6% Sloped Above Grade Bed 41
Use the section above to go to the correct portion of this manual.
To Next Page