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
8. Wash all components in fresh water.
9. Inspect all components for damage that could affect structural strength or sealing properties.
Replace any parts that are unacceptable. Examples of when component replacement is required
are as follows:
a. Feed/reject port is bent or distorted.
b. Permeate port internal or external thread is stripped
c. Permeate port nut is stripped.
d. Bearing plate is bent or distorted or anodized coating is removed.
e. Seal plate is cracked or distorted or sealing area is damaged.
f. Retaining ring is bent or damaged.
WARNING
Potential cause of RO vessel failure. The RO end caps must be correctly
assembled. Incorrect assembly can result in catastrophic failure. Failure to
observe this warning can result in severe equipment damage and serious injury or
death.
10. Assemble the end cap as follows:
a. Cover each of the following new O-rings or seals with a thin, even layer of glycerin and
install:
(1) Feed port O-ring
(2) Permeate port O-ring
(3) End cap seal
(4) Adapter O-ring
(5) PWT O-rings (two at each of the two adapters)
(6) Inter-connector O-rings (two at each end of the inter-connector)
b. Hold the bearing plate so that the counter bore of the off-center hole is facing you.
c. From the other side, insert the smaller, machined end of the feed/reject port through the
off-center hole.
d. Install the port retainer set into the groove in the machined end of the feed/reject port.
e. Pull the feed/reject port back until the retainer set settles into the bottom of the bearing
plate recess.
f. While holding the feed/reject port, retainer set and bearing plate together, position the
larger diameter side of the seal plate so that it faces the bearing plate and press the seal
plate onto the machined end of the feed/reject port.
g. Rotate the seal plate until the holes in the seal plate align with the holes in the bearing
plate.
h. Insert the threaded end of the permeate port through the seal plate and the bearing plate.
Press firmly until the permeate port bottoms onto the seal plate.
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