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Determining Mag Probe Length
Determining Mag Probe Length
1. Measure the distance from the bottom of the tank to the top of the probe manway, or the 2-, 3- or 4-inch tank
opening- this is the minimum probe length (ref. Figure 9).
2. The probe canister must be within the riser pipe (minimum length of 10 inches [254mm]).
Figure 9. Determining the Minimum Mag Probe Length
Determining Mag Probe Length for Installation in a Vapor Extractor Riser
1. Measure the distance from the top of the riser to the Extractor Cage Cross Pin (see Figure 10). Record this
distance as “D1” (Important - Dimension “D1” must be at least 25 inches).
2. Use the extractor wrench tool (OPW Part Number: 89-0044) to remove the Ball Float Check Valve Assembly
from the riser.
Top of probe
manway
Top of 2-, 3- or
4-inch tank
opening
Tank
Minimum
Probe length
STP manway
3" (76mm) min. clearance from
top of canister to top of riser (Typ.)
Probe canister must be
within riser pipe (Typ.)
Manway cover
10" (254mm) minimum
riser length (Typ.)
Recommended distance
between probe and STP
is at least 12 inches
OR
OR
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