TM 10-4610-241-10
TO 40W4-13-41
2-7. ROWPU ASSEMBLY AND PREPARATION FOR USE - cont.
o.1
Setup Raw Water System Using Ocean Intake Structure - cont.
(26)
Drill the second wellpoint into the ocean floor using techniques performed in the installation of
the first wellpoint (step 17).
NOTE
An up-and-down, as well as a turning motion may ease the drilling of the wellpoint.
Depending on ocean floor conditions, it may be necessary to support the wellpoint and
riser because of the fast drilling action of the wellpoint as it goes downward through the
ground.
(27)
Position the second wellpoint so that the elbow fitting on the end of the riser is approximately one
foot above the ocean floor.
NOTE
After both wellpoints have been positioned, hoses must be repositioned to use wellpoints
for a raw water source.
(28)
Remove cap from tee assembly.
(29)
Remove the 10-foot length of 2-inch suction hose that is connected to the second wellpoint and
attach it to the opposite end of the tee assembly.
(30)
Remove and store the hose from the outlet of raw water pump No. 1.
Remove and store the quick
disconnect fitting, the gate valve and pipe nipple.
(31)
Attach a 1-1/2” male quick disconnect fitting to the outlet of raw water pump No. 1.
(32)
Connect a canvas discharge hose from the discharge side of raw water pump No. 1 to raw water
pump No. 2 which is already connected to the ROWPU (refer to figure 2-36b).
2-66.4 Change 2
