ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
5. Clean and inspect the inside of the vessel as follows:
a. Remove the 3-way ball valve and piping by unscrewing the permeate port nut. Not the
position of the 3-way valve.
b. Flush out the vessel with clean water to remove any debris.
c. Inspect the inside surface of the vessel for corrosion, deposits or other foreign matter. If
any are found, clean the surface as follows:
1) Using a scouring pad and a mild soap solution, clean each end of the vessel liner
surface up to eight in. from each end of the vessel.
2) Rinse away all loosened deposits from the inside of the vessel.
WARNING
Do not attempt to repair a fiberglass vessel. If a vessel has damage or scratches
deeper than the paint, the vessel should be replaced. Failure to observe this
warning can result in injury or death or damage to equipment from catastrophic
failure of the vessel under high pressure during operation.
d. Examine the inside of the vessel for scratches or imperfections that may affect the
sealing ability of the end cap or element seals. If severe scratches or damage are found,
Notify Direct Support to replace the vessel as described in WP 0070, RO System Direct
Support Maintenance Procedures under the headings REPLACE and RO Vessel.
CAUTION
Do not attempt to repair a damaged vessel.
6. Disassemble the end cap(s) as follows (see Figure 13):
a. Remove the permeate port nut by unscrewing (left-handed thread).
b. Remove the permeate port by pressing the port out of the end cap from the threaded
end.
c. Hold the feed/reject port and the bearing plate still and rotate the seal plate slightly to
break the seal. Remove the seal plate.
d. Press the long, exposed end of the feed/reject port further into the bearing plate to free
the port retainer set.
e. Remove the two-piece feed/reject port retainer set.
f. Remove the feed/reject port from the bearing plate.
CAUTION
Be careful not to damage end cap, port, adapter, or inter-connector surfaces when
removing O-rings and seals. Failure to observe this caution may result in leakage.
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