FFS-0772 Forecourt Guide No 6 InteractiveSpreads - Flipbook - Page 13
DEFENDER SERIES® OVERFILL PREVENTION VALVE:
DEFENDER SERIES® GRADE LEVEL SPILL CONTAINER:
I N S P E C T I N G / V E R I F Y I N G 9 5 % L E V E L (without removing from tank)
TO R Q U E S P E C I F I C AT I O N S
For dimensions “A” & “B”: Refer to the Installation Record Sheet or re-measure and
recalculate per Figure 1.
1. Measure Dimension “Z” (Figure 18)
Upper drop tube flange
to edge of upper tube
adapter
“Z”
2. Verify using the calculation below
FT-LBS / N-M
125-150 / 170-203
Swivel adapter to pipe nipple
75-100 / 102-136
I N S TA L L AT I O N D E P T H P R E PA R AT I O N : N E W S I T E A P P L I C AT I O N
Measure
“Z”
Drop tube seal surface
to bottom of tank
“A”
LOCATION
Spill container to UST riser pipe
1. Lay string line or straight edge across the tank riser at finished grade height.
2. Cut the riser pipe so that the top edge will be 15.0" (381 mm) +/- 1.5" (38.1 mm) from finished
grade. The actual height (elevated grade) of the bucket will be 1.0" (25.4 mm) above finished
grade to ensure proper water run-off (sloped dome).
Note: Cut the riser pipe square/perpendicular to endure a flat sealing surface.
Finished Grade
- (Subtract)
13.5
- 16.5"
- 16.5
cm)
15"
(38.1
cm) (34.3
+/- 1.5"
(3.81
cm)
95% Volume from
tank chart
“B”
4½"
(114 mm)
- (Subtract)
The riser pipe must be between 13.5" (343 mm) and 16.5" (419 mm) from the finished grade level.
4.5" (114 mm)
95% Shut-off level offset
R E T R O F I T A P P L I C AT I O N
= (Equals)
95% Shut-off level offset
Note: Refer to Tech Update TB0617-01 Defender Series™ OPV Inspection for full inspection form.
1. Remove an appropriate size section of concrete around the existing spill container.
The minimum recommended size is a 36" (914 mm) square around each spill container.
2. Remove existing spill container.
3. Excavate a 24" (610 mm) diameter by 24" (610 mm) deep (measured from top of riser)
around the riser pipe.
24" (61 cm)
NOTES:
Finished Grade
13.5 - 16.5" (34.3 - 16.5 cm)
4. Check the height of the riser pipe compared to finished grade level. Lay a straight edge
across the excavated area and measure from grade to the top of the riser pipe. The riser
pipe must be between 13.5" (343 mm) and 16.5" (419 mm).
5. If the riser pipe is too long, it must be re-cut or replaced to obtain appropriate length.
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