Mag Probe Installation UST/AST Tank - Dedicated Riser
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Figure 16. U.S. Probe Installation Example - Above Ground Storage Tank
Legend for numbered boxes
1 Riser cap and cord grip
2 Use bushing and body of grip fitting supplied with probe and adaptor nut supplied with AST kit (V-R P/N 312020-984
3 Liquidtight fittings from AST kit
4 Flexible metal conduit supplied with AST kit
5 Weatherproof junction box with 1/2” NPT threads (16 cubic inch minimum).
6 Seal off - epoxy seal per NFPA specifications
7 1/2-inch rigid conduit to console
8 Riser pipe: 2-, 3-, or 4-inch API schedule 40 depending on probe type
9Tank
10 Top view of optional split ring collar (P/N 576008-617) - required if probe enters riser,i.e., when probe length exceeds tank
diameter.
11 Side view of optional split ring collar
12 Water float (Magnetostrictive probe rests against bottom)
13 Product float
14 14" minimum for global mag plus/mag plus probes. When installing a probe longer than the tank diameter, increase this
minimum dimension to compensate. (Example: a 7'-6'' diameter tank will use an 8' probe, in which case you must add 6" to
minimum riser length 'A', i.e., 20").
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