Mag Probe Installation
UST Installation - Vapor Extractor Riser W/ Coupling Adapter
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3.
Make sure there is a minimal amount of slack between the probe and cap, then tighten the cord grip nut until
the cable is held firmly. Push the end of the cable through the field J-box cord grip, then tighten that cord grip
nut as well. Splice and seal the wires in the J-box.
AST RISER CAP ATTACHMENT
1.
If you are using the one piece cap (see Figure 6 on page 9), push the end of the probe cable through the cap
and cord grip bushing, leaving a minimal amount of slack between the probe and cap. Discard the cord grip
nut and attach the adapter Nut from the AST kit to the cap (see Figure 3 on page 6). Tighten the adapter Nut
until the cable is held firmly. Go to Step 3.
2.
If you are installing the metal cap and ring (see Figure 7 on page 10), screw the ring onto the 4” riser until the
gasket contacts the pipe, then use a pipe wrench to tighten it an additional 3/4 turn. Using UL-classified pipe
sealant (suitable for the fuels involved), screw the cord grip fitting into the tapped hole and tighten. Place the
cord grip bushing in the fitting. Discard the cord grip nut and loosely screw the adapter Nut from the AST kit
onto the cord grip fitting (see Figure 3 on page 6). Push the cable through the metal cap, bushing, and
adapter nut, then clamp the cap onto the ring. Make sure there is a minimal amount of slack between the
probe and cap, then tighten the adapter Nut until the cable is held firmly.
3.
Next assemble the liquidtight connectors on both ends of the flexible conduit as shown in Figure 3. Push the
cable through the flexible conduit assembly and into the J-box. Connect the flexible conduit assembly to the
adapter Nut on one end and the J-box on the other.
4.
Tighten the fittings until snug. Splice and seal the wires in the J-box.
UST Installation - Vapor Extractor Riser W/ Coupling Adapter
This type installation is usually a retrofit and is usually connected to the console via direct burial cabling. The site
should already be prepped (all digging, saw cutting, and jackhammering done) prior to probe installation (see
Figure 12). A piece of flex conduit should be in place as shown to protect the cable.
Figure 12. Vapor Extractor Cabling Entry
1.
Remove any existing hardware from the Vapor Extractor Riser so that it’s 4” NPT riser threads are exposed.
4" Riser
probes\verprep.eps
Manhole Cover
(Backfill)
(Concrete)
Flex Conduit
Sawcut trench for
Direct Burial Cable
Jackhammered entry to
bottom of manhole
