TM 10-4610-241-10
TO 40W4-13-41
2-7. ROWPU ASSEMBLY AND PREPARATION FOR USE - cont.
o.1
Setup Raw Water Svstem - cont.
NOTE
During initial installation, one of the two wellpoints is used for source water when jetting
the other wellpoint. The wellpoint used for source water may be either laid flat on the
ocean floor (beach) or attached to a vertical metal stake while the jetting operation is
conducted. Ensure that the source wellpoint, whether laid flat or attached to stakes, is
completely submerged. Refer to figure 2-36a.
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
Assemble both wellpoints by attaching the 36” long nipples to the top of the wellpoint. Then
install bushing, elbow, and quick disconnect fitting.
NOTE
Install check valve so that water flows from tee.
Assemble the tee by attaching the male quick disconnect fittings to opposite
ends. Attach the check valve and female quick disconnect fitting.
Attach the male end of one 10-foot suction hose to the source wellpoint.
Attach the female end of the lo-foot source wellpoint suction hose to the tee assembly.
Attach the 2-inch Cam-lock cap to the tee assembly.
Attach the male end of 50-foot suction hose to the female Cam-lock fitting on the tee assembly.
Add additional 50-foot lengths of suction hose as needed.
Attach the female Cam-lock of the 50-foot suction hose to the inlet adapter of the ROWPU raw
water pump No. 1.
Attach one or more lengths of 50-foot, 2-inch suction hose to the gate valve at the discharge of the
pump. Attach the other end of the hose to the wellpoint to be drilled
Attach the plastic boot to the jetting shoe of source wellpoint by sliding plastic boot over bottom
of wellpoint and then fastening with a hose clamp.
WARNING
When installing the wellpoint( the area near the hole may fluidize creating a wide hole.
This could result in loss of solid footing and the operator could fall into the hole being
drilled. This could result in death by drowning. Ensure that there is someone nearby
who may render assistance while wellpoints are being drilled.
NOTE
•
Any unchlorinated water source can be used for installing the first wellpoint.
Normally, ocean water available at the wellpoint installation site will be used.
However, a 3,000-gallon tank filled with any available unchlorinated water can be
substituted for raw sea water.
•
The wellpoints should be installed in ankle-deep water during the lowest tide of the
day.
WARNING
Pass electrical cable under water hoses to prevent tripping hazard.
2-66.2 Change 2
