38-11-00
 ALL  ú ú 07 Page 303 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 863-055
 (3)  ALL EXCEPT LAVATORIES D AND E;
 in each lavatory, turn the handle for the lavatory drain valve to
 DRAIN.
 NOTE: The drain valves in lavatories D and E must not be moved from____
 their normal (SUPPLY/DRAIN or ON) positions for this
 procedure.
 S 863-077
 (4)  Set the secondary drain valve handle to DRAIN and then turn the
 drain valve handle to DRAIN to exhaust the water that remains.
 S 863-029
 (5)  When the flow of water stops from drain outlets, close the fill and
 overflow valve and tank drain valve.
 S 863-049
 (6)  ALL EXCEPT LAVATORIES D AND E;
 turn the handle for the lavatory drain valve to SUPPLY or ON as
 applicable.
 S 863-078
 (7)  Shut the secondary drain valve and then turn the water valve handle
 to SUPPLY or ON as applicable.
 S 683-019
 (8)  In the galleys with a faucet installed, open the faucet.
 S 863-028
 (9)  In the galleys with a water boiler and/or coffeemaker installed,
 move the switches for the water boilers and coffeemakers to the OFF
 position.
 S 683-029

 (10)
 Drain the water from the water boilers and coffeemakers.

 S 683-030

 (11)
 In the galleys with a faucet installed, close the faucet when the flow of water stops.

 S 683-031

 (12)
 In the galleys that have a water filter installed below the level of the lowest water outlet, drain the water filter.

 S 413-032

 (13)
 Install the towel disposal container if it is necessary and close the doors.

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 ALL  ú ú 11 Page 304 ú Jul 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 TASK 38-11-00-673-033
 3. Potable Water System Disinfect Procedure
________________________________________
 A. General
 (1)  The intent of this task is provide a solution of disinfectant to the potable water system that achieves a concentration of 100 ppm (parts per million). When mixing the disinfectant, the stablized chlorine dioxide (Purogene) is measured by volume (fluid ounces or liters) and the citric acid is measured by weight (ounces or grams).
 B. Consumable Materials
 (1)
G00022 - Chlorine dioxide, liquid (Purogene), stabilized (2%).

 (2)
B00637 Acid - Citric 99% (crystaline or powder) (Recommended)

 C. References
 (1)  
AMM 12-14-00/301, Water Servicing

 (2)  
AMM 38-41-00/201, Water Tank Pressurization

 D. Access
 (1)  Location Zone
 220 The Aft Cargo Bay

 E. General
 (1)  Disinfect the potable water system with the solution that follows:
 (a)  100 parts per million of chlorine acidified with citric acid.
 NOTE: The disinfecting time is 1 hour.
____
 F. Procedure
 S 683-081
 (1)  
Drain the potable water system, AMM 38-11-00/301.

 S 023-063

 (2)  
In the galleys with a water filter installed, remove and discard the filter cartridge from the water filter.

 (3)  
Install the caps for the filters.

 S 423-036
 NOTE: A large amount of disinfectant in the potable water system
____ may contaminate the filters and give a bad taste of chlorinated water.
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 38-11-00
 ALL  ú ú 11 Page 305 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (4)  S 673-034Make the disinfectant that follows:
 NOTE:____ The disinfectant mixtures will provide the full system with a solution of chlorine at 100 parts per million.
　
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