Pipelines And Under Ground Containment Sumps; Shut Off Valve; Overfill Protection For The Under Ground Storage Tank - Bennett 3000 Series Installation Manual

Pipelines and Under Ground Containment Sumps

General -
The dispenser must be mounted on a concrete foundation. Do not pour concrete around the product
return pipe or electrical conduit. The use of a UL approved containment sump designed for the Bennett
Dispenser Model used is highly recommended. Follow the containment sump manufacture's installation
instructions for proper installation. If no containment sump is used, fill the sump area with clean sand or
dirt as far up the product pipe as possible once installation is complete. Use water to pack the sand in
place. See Figure.
For the defueler dispenser, a U.L. Listed Emergency Double Poppetted Shut Off Valve is required for
the product return pipe. This valve is installed on the return piping line beneath the dispenser at grade
level to minimize hazards associated with collision or fire at the dispenser. The valve will also permit
safe inspection and maintenance. If the dispenser is pulled over or dislodged by collision, the top of the
valve breaks off at the integral shear groove, activating poppets and shutting off the flow of fuel.
double poppeted valve operates much the same as a standard Emergency Shutoff Valve except that, if
the dispenser is toppled off the island it will close both sides of the pipe. In other words, it blocks flow in
both directions. The defueler only requires that the flow be stopped between the discharge of the meter
and the shear section of the shut off valve. The Emergency Shut Off Valve must be supported by the
island frame or containment sump frame. There are many types of double poppetted shut off valves
available. Follow all instructions contained in the valve's installation manual and observe all local codes.
Overfill Protection - Underground Storage Tank
Since the product is being returned to the underground storage tank, care must be taken not to overfill
the tank. The Installer must ensure that
dispensers return line. Follow all instructions contained in the device's installation manual and observe
all local codes.
108670 Rev A
Fig. - Example of Self Contained

Shut Off Valve

Install the shut off valve so that if the dispenser is toppled off the island, the
valve will prevent pressurized liquid from flowing from the dispenser.
Remember, on the defueler, pressurized liquid is pumped from the dispenser
back to the underground storage tank.
proper overfill protection is provided at the tank for the
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08/04