Determining The Number Of Product Supply Pipes Needed; Mechanical And Plumbing Notes - Bennett 3700 Series Installation Manual

Determining the Number of Product Supply Pipes Needed

Step 1: Determine the type of supply line needed from the model number's 7th position on the
serial tag. If the model number is 3711SNR (Note the R) the dispenser will require a submerged pump
and pressurized supply line for each product. If the model number is 3711SNS (Note the S) the pump
will require a suction supply line for each product.
Step 2: Determine the number of product pipes required by finding the model number below.
Model Number Product Supply Lines Required
3711 / 3811 Use 1 product line plumbed to position 1.
3712 / 3812 Use 1 product line plumbed to position 1.
3722 / 3822 Use 1 product line plumbed to position 1 and 1 product line plumbed to position 2.
*Refer to base drawings in the back of this manual for product inlet locations.
Pipe Size - The 3000 Series do not come with an inlet pipe or joint. The customer is responsible for the
1 1/2" NPT inlet pipe. These will thread directly into the inlet casting (see figure 7, figure 8 and figure 9).
Not Included
Figure 7 - Master Big Fueler

Mechanical and Plumbing Notes

For remote dispensers, a U.L. Listed Emergency Shut Off Valve is required for each product inlet. The
Emergency Shutoff Valve can be referred to as an "Impact Valve", "Safety Valve", "Shear Valve",
"Crash Valve", or "Fire Valve". The Emergency Shut Off Valve must be supported by the island frame or
containment sump frame. Follow all instructions contained in the valve's installation manual and
observe all national, state, NFPA, and local codes.
For self-contained
Install an approved emergency shut off valve, designed to close automatically in the event of severe
impact or fire exposure, in the dispenser supply line at the base of the dispenser. The valve will also
(suction) pumps, a
permit safe inspection and maintenance. Follow the installation instructions for the valve being
vertical check valve is
installed (see figure 10).
required under each
of the pump's ground
joint unions for the product inlet. The vertical check valve ensures that the
pump's hydraulic system remains full of product, and it is necessary to
maintain the "prime" of the suction line so that liquid product does not drain
back to the tank. Follow all instructions contained in the vertical check
valve's installation manual and observe all local codes.
Product inlet locations and dimensions are on the footprint foundation
drawings in this manual.
Listed ground joint union must be installed between sheer section of
Emergency Shut Off valve and dispenser inlet. If rigid product inlet pipes
are used, they must be plumbed so no strain is exerted on the dispenser chassis caused by tightening
down the unions.
For dispensers used with companion satellites, follow all federal, state, and local codes regarding
installation of impact valves.
Figure 8 - Satellite
15
Figure 9 - Big Fueler Suction
Figure 10 - Shear Valve
120001 Rev K 1-19-18