Installing Units on Island Connecting Pump/Dispenser Inlet Pipes
MDE-5427E Latitude
™
Installation Manual · July 2022 Page 5-11
Connecting Pump/Dispenser Inlet Pipes
WARNING
The shear valves must be installed correctly.
Improperly or insufficiently anchored shear valves can lead to fire or explosion that could
result in severe injury or death.
Anchor all the shear valves as per the manufacturer’s instructions.
National Pipe Taper (NPT) pipe threads can at times be difficult to seal during installation or
later, because of various conditions such as minor thread damage, contamination, slight
thread imperfections, poor assembly practice and other reasons. Gilbarco has found that
although NPT threads can be sealed normally with a good quality pipe sealant alone (the
normal recommendation), on many occasions, fewer issues are created during installation by
using a combination of sealant and Teflon pipe tape. The additional expense incurred to apply
both will save money for the installer in the long run by spending less time correcting leaks
during installation.
When using a Teflon pipe tape, it is extremely important to apply it properly so that no tape
stringers are created to enter the hydraulic system. Tape stringers can cause serious issues
with valves, nozzles, and other hydraulic components. For information on how to properly use
the Teflon pipe tape and thread sealant to ensure fewer installation issues and fewer
subsequent pump/dispenser problems, refer to “Inlet Pipe Assembly” on page 5-12.
This information and recommendation does not apply to hanging hardware connections.
Damage to aluminum parts of the hanging hardware or dispenser can occur since it is very
difficult to control proper torque tightening because of the thread-assembly friction.
IMPORTANT INFORMATION
Note: Pumps do not have to use shear valves, except in special circumstances. The following
procedure for a pump is identical to that of a dispenser, except that a shear valve may
not be used. The contractor must provide and install pipe unions whether shear valves
are used or not.
To connect pump/dispenser inle
t pipes, proceed as follows:
1 Remove the vertical low hydraulic cabinet brace (found only in some units) to gain access
during the installation of plumbing. Reinstall this brace after you complete the installation of
the plumbing.
For units with a shear valve, a contractor-provided union must b
e installed on the shear valve.
For proper tightening of the union to the shear valve, refer to the shear valve manufacturer’s
instructions. For units without shear valves, a contractor-provided union must be installed on
the ground stub pipe.
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