Franklin Fueling Systems Tank Sentinel (TS-1001, 2001, 504, 508 & 750) Installation - Manual (Page 23)

2 Page 2 - 4 TANK SENTINEL ® INSTALLATION GUIDE
Riser Installation — Level Probe
After excavating down to the top of the tank, locate the bung that will be used to
install the riser pipe and level probe. Apply thread sealant to the “tank-side” of the
threaded riser pipe, remove the pipe plug from the tank bung, and install the 4 inch
(102 mm) riser pipe in this bung.
For tanks with 2 inch (50.8 mm) bungs, add a 4-to-2 inch (101.6 to 50.8 mm)
reducer at the tank and then install a 4 inch riser (this configuration requires 2-inch
floats). For tanks with 3 inch (76.2 mm) bungs, add a 4-to-3 inch (101.6 to 76.2
mm) reducer at the tank and then install a 4 inch (101.6 mm) riser (this
configuration also requires 2-inch (50.8 mm) floats).
CAUTION When installing a riser pipe in a steel tank, applicable codes of
practice may require that a nonconductive isolation bushing be installed between
the tank and riser pipe. It is the installer’s responsibility to comply with all applicable
federal, state and local codes.
Manhole Installation
Install an approved manhole at each riser pipe location. Manholes of 14" (355.6
mm) minimum diameter are recommended. To make sure that there is adequate
clearance for the installation of the electrical junction box and for service, position
the manhole over the riser carefully — offset the manhole around the riser pipe. It is
recommended that the bottom of the manhole be filled with crushed stone to
facilitate drainage. Do not cover the top of the riser with fill material, it must remain
accessible for service, and for probe installation. (Manholes are not required with
AST applications.)
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