ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0008 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
PREPARATION FOR USE AND INSTALLATION INSTRUCTIONS
OCEAN INTAKE STRUCTURE SYSTEM (OISS) SET-UP OPERATION
UNDER UNUSUAL CONDITIONS
LAYOUT OISS
1. Connect one or two 5 ft. risers or a 2 ft. riser as required by the site to each elbow or tee and its
wellpoint. Use Teflon tape when connecting the threaded sections.
2. Lay out (but do not connect) the wellpoints and (yellow-banded) hoses as shown in Figure 1 in
the general area where they will be assembled. If the terrain is rocky or otherwise unsuitable for
driving wellpoints into the sand, the OISS can be submerged in the raw water source in a
horizontal position. Note that there are two riser/wellpoint assemblies with elbow fittings and two
with tee fittings.
20 FT
20 FT
10 FT
10 FT
2 IN. ELBOW
2 IN. TEE
2 X 2 X 3 TEE
10 FT HOSE
TWO 5-FT. RISERS
OR ONE 2-FT. RISER
COUPLING
WELLPOINT ASSEMBLIES
Figure 1. Typical OISS Configuration.
3. Check the condition of the wellpoints. Notify Unit Maintenance if damaged beyond use.
4. Check the gaskets inside the female ends of the elbows, tees, and hoses. Replace missing or
damaged gaskets with new gaskets.
5. Rinse the camloks (locking ends of elbows, tees, and hoses) in a bucket of water to remove sand
and ensure a leak-free connection.
ESTABLISHING A WATER SOURCE TO JET THE WELLPOINTS
"Jetting the Wellpoints" is a procedure for forcing water through the risers, out the wellpoints and into the
sand. The jet of water fluidizes the sand and allows the wellpoint to easily sink down into the sand. A
water source is required to jet the wellpoints. Either of the following two setups can be used to establish
a water source for jetting the wellpoints:
1. If conditions permit, the floating inlet strainer and anchor can be installed as described in WP
STRAINER AND ANCHOR DEPLOYMENT. After the OISS is installed, the floating inlet strainer
can be left in place and used to provide a source of water to operate the TWPS when operational
conditions permit (see Figure 2).
2. If desired, or if necessary due to rough water conditions, two wellpoints can be connected
together and submerged horizontally in the surf (see Figure 2).
0008 00-2
