ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0016 00
OPERATOR INSTRUCTIONS
MAINTAINING NORMAL OPERATION UNDER USUAL CONDITIONS
NOTE
The Bisulfite System is only used when the raw water source is chlorinated, as is
always the case with municipal water. When in use, the Bisulfite Pump Switch is
set to AUTO.
1. Check:
a. The chemical pump is set to pump 4.2 to 5 gallons during a 10-hour operating shift
b. The chemical level in the bucket should be observed to make sure that it drops a little
less than 1/2 gallon per hour. If this is not observed, refer to troubleshooting in WP 0033
2. Refill:
a. Refill when the remaining level is between the 1/2 and 1-gallon marks on the bucket.
b. Using the product utility hose, open valve V-511 to slowly fill to the bucket to the 5-gallon
level. At the same time slowly add one 12 oz packet of bisulfite.
c. Rinse the paddle with water from the product utility hose. Stir the water in the bucket with
the mixing paddle to thoroughly mix in the bisulfite. Be careful not to damage the suction
strainer. Rinse the paddle again when finished.
3. Pump Settings are the same for all conditions:
a. Speed 70
CAUTION
The stroke length should only be adjusted when the pump is running.
b. Stroke 60
5. Check the Prime:
a. Check that the pump return line hose is directed into the tank.
b. Rotate the black knob on the priming valve counter-clockwise one half turn and check
that the chemical is discharging through the pump return line hose. If not observed, refer
to troubleshooting in WP 0033.
c. Return the black knob on the priming valve to its normal position.
EVALUATING RO % CLEAN AND RO % SALT REJECTION
The evaluation of the RO clean and salt rejection percentages indicates the condition of the RO
membranes and the need to clean or replace the RO elements.
1. RO % Clean:
a. The RO % Clean is obtained from the operating data using the procedure provided by
b. RO % Clean shows the openness (permeability) of the RO membranes to water flow as a
percentage of the new membrane openness.
c. As the RO% Clean value decreases (as the membranes become fouled), the pressure
required to produce the same water flow increases.
d. RO % Clean decreases as the RO elements age, especially when operated at high
pressures with warm source waters.
0016 00-10
