ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0027 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR INSTRUCTIONS
OPERATION UNDER UNUSUAL CONDITIONS
EQUIPMENT DECONTAMINATION AFTER AN NBC WATER PURIFICATION MISSION
At the conclusion of an NBC water purification mission, the TWPS must be decontaminated before
moving. There are different procedures for nuclear decontamination and chemical/biological
decontamination. If nuclear contamination is present together with chemical and/or biological
contamination, use the chemical/biological decontamination procedures.
Nuclear Decontamination
1. Shutdown to standby.
2. Flush the MF System as follows:
a. Clean the MF feed strainer and re-install.
b. Empty the MF feed tank. Remove the bag strainer and set aside for disposal.
c. Fill the MF feed tank with product water.
d. Set the MF Clean Switch to BACKWASH.
e. Complete four backwashes with product water.
f. Set the MF Clean Switch to OFF.
3. Flush the RO System as follows:
a. Set the product hose to discharge on the ground.
b. Use the distribution nozzles to keep the MF feed tank full of product water.
c. Start up normally. Do not initiate the backwash.
d. Continue operation for 10 minutes. Shutdown to standby.
4. Drain the TWPS as follows:
a. Set the Mode Switch to MF DRAIN.
b. When the drain is complete, set the Mode Switch to STANDBY and then back to MF
DRAIN for a second drain.
c. Open RO Vessel Drain Valve V-408.
d. Connect the auxiliary air hose to the air system connector and then to RO Air Purge
Valve V-913. Partially open V-913 and leave open until air begins to discharge from RO
Vessel Drain Valve V-408.
e. Open all drains (see Table 2 and Figure 5 for valve location).
5. Remove the MF elements as follows:
a. Remove the MF elements including the filtrate cups and O-rings (see WP 0040).
b. Set aside for later disposal by a decontamination team.
6. Flush the Raw Water System as follows:
a. Reset the raw water suction hoses to draw from the MF feed tank.
b. Keep the MF feed tank full with product water from the distribution nozzles.
c. Connect all of the hoses and pump(s) that were originally deployed.
d. Set the discharge hoses to discharge back to the raw water source.
e. Start the pump(s).
f. Fully open Raw Water Flow Control Valve V-107 (see Figure 2 for valve location).
g. Flush for approximately 10 minutes.
7. Preparation for Movement: Follow normal procedures.
0027 00-17
