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 TB 55-1900-231-15
C. This blank will also be equipped with a 4" PVC pipe coupling and pipe nipple for the humid air return from
the 4" flex hose pickups. Stencil the blank or adjacent surface with '"DRY AIR" and "HUMID AIR" for the
benefit of those who will connect the D/H systems.
controller and the lazarette through 4' flex hose, hose clamps, 4" PVC pipe nipples, and one (1) 4" PVC tee
and out the port pilothouse window.
E. Two (2) sensing elements will be installed: One (1) within three (3) feet of the pickup in the crews quarters,
the other within three (3) feet of the pickup in the lazarette.
F. One (1) humidistat will be installed within three (3) feet of the pickup in the lazarette. The humidistat will
be set to maintain 40 percent (plus or minus 5 percent) relative humidity.
IV. MATERIAL REQUIREMENTS: The following listing contains an estimate of those materials required for
preservation.
*The estimated quantity reflects the requirements for four (4) watercrafts.
A. MATERIALS:
UNIT OF
EST.
NSN
NOMENCLATURE
ISSUE
QTY
Local Purchase
4' PVC Pipe, Schedule 40
20 Ft. Lengths
4
"" ""
4" PVC Pipe Couplings
EA
9
"" ""
4" PVC Tee
EA
4
"" ""
4" PVC Glue
PT
4
P-10, Type I, Grade 30
Preservative Oil
DR (55 Gal.)
24
P-9 Preservative Oil VV-L-800
CN (5 Gal.)
16
P-10, Type I, Grade 10,
Preservative Oil
CN (5 Gal.)
4
P-2 Preservative
CN (5 Gal.)
4
P-1 Preservative
CN (5 Gal.)
2
Tape, 2 Inch, Pressure
Sensitive
RL
24
Tape, 3 Inch, Pressure
Sensitive
RL
24
Adhesive, Fed. Spec.
GL
12
Hose, Flex 4 Inch
MIL-H-8796
FT
600
A-4
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