ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
Replace inline RO Strainer S-4 as follows (see Figure 6):
WARNING
The TWPS must be in Shutdown and the TQG and TWPS main breaker must be off
(Army) or the TWPS disconnected from its power source (Marine Corps) prior to
removing or installing inline RO Strainer S-4. Failure to observe this warning can
result in injury or damage to equipment.
1. Remove inline RO Strainer S-4 as follows:
a. Close valve V-212 at the left of Strainer S-4.
b. Open drain valve V-213 at the bottom of Strainer S-4.
c. Remove the 2-in. grooved coupling at the right of Strainer S-4.
d. Inspect the coupling gasket for damage or deterioration and replace if needed. Push the
gasket back over the pipe end.
e. Support Strainer S-4 and remove the 4-in. sanitary clamp at the left of Strainer S-4.
Inspect the clamp gasket for damage and replace if necessary.
f. Remove the strainer assembly.
g. Remove and discard the strainer's interior mesh.
h. Unscrew Drain Valve V-213 and its hose assembly from the strainer body.
GROOVED COUPLING
GROOVED COUPLING GASKET
SANITARY CLAMP GASKET
STRAINER S-4
S-4 MESH
HP PUMP INLET
VALVE V-212
SANITARY CLAMP
S-4 BODY
DRAIN VALVE V-213
Figure 6. Inline RO Strainer S-4 Replacement.
2. Install Strainer S-4 as follows:
a. Clean off any tape residue remaining on the threads of the drain valve.
b. Wrap antiseizing tape on the drain valve pipe threads and screw the drain valve and hose
assembly to the strainer drain port.
c. Position the strainer mesh in the strainer body. Set the sanitary gasket in place on the
strainer body flange.
d. Set the strainer body in place. Be sure that the gasket is properly positioned and the
strainer flange is centered.
e. Install and partially tighten the sanitary clamp.
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