ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE
NOTE
If no union or pipe connection is found close to the valve, then remove the valve as
you would a welded ball valve. Refer to REPLACE and Ball Valve, Welded.
b. Find the closest union or connection on either side of the valve and disconnect that part
of the piping.
c. Unscrew and remove the disconnected end of the piping from the valve-threaded
connection.
d. Unscrew the valve from the other fixed section of the pipe line.
e. Place the old valve on a clean workbench.
VALVE HANDLE
THREADED PIPE
VALVE ASSEMBLY
Figure 6. Threaded Ball Valve Replacement.
3. Clean the pipe threads and apply antiseize tape to the pipe threads.
4. Inspect the new valve. Remove any shipping residue and make sure that the valve is clean.
5. Install the new valve as follows:
a. Make sure that the valve is in the open position (as shown in Figure 6).
b. Thread the new valve onto the fixed piping so that it is in the same position as the old
valve.
c. Thread the piping that was disconnected from the old valve to the new valve and tighten.
d. Install the union or connection that was removed to disconnect the piping and tighten.
6. Operate the system to check for leaks and proper operation.
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