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 (a)  Recommended Disinfectant -1) Chlorine dioxide (stabilized 2%) and citric acid (crystals or powder)
 WARNING:_______ DO NOT BREATHE THE CHLORINE DIOXIDE GAS. WHEN THE TWO CHEMICALS ARE MIXED, CHLORINE DIOXIDE GAS IS PRODUCED WHICH CAN CAUSE INJURY TO PERSONS IF THEY BREATHE THE GAS.
 a) b) c) d)  Mix the following amounts of chlorine dioxide with citric acid in a clean plastic container: 25.6 fluid ounces (0.76 liters) chlorine dioxide, 2.66 ounces (75.4 grams) citric acid.Use a clean instrument to mix the solution fully.Stop for 5 minutes (activation period).Add 5 gallons of water to the solution.
 (5)  S 673-090If a water service cart with a chlorine metering system is used, do the steps that follow: (a) Add the disinfectant solution to the chlorine solution reservoir in the service cart. (b) Make sure the chlorine solution reservoir in the service cart is full. (c) Fill the water system until the water chlorine solution drains from the overfill valve.
 (6)  S 673-042If a service cart with a chlorine metering system is not used, use a recommended concentration of chlorine solution in the steps that follow: (a) Add the disinfectant to the potable water system through the water fill connection at the potable water service panel. (b) Fill the remaining volume of the water tank with clean water. (c) Fill the water system with clean water until the water chlorine solution drains from the overfill valve.
 (7)  S 673-082Close the fill and overflow valve immediately.
 (8)  S 673-083Pressurize the water system (AMM 38-41-00/201).

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737-300/400/500MAINTENANCE MANUAL
 S 673-084
 (9)  Open the faucet, if one exists, found in each galley to vent the air from the water system.
 (a)  Close the faucet immediately after the chlorine solution begins to drain.
 S 673-086
 (10) Open the hot and the cold faucet in each lavatory to vent the air from the water system.
 (a)  Close the faucets immediately after the chlorine solution begins to drain.
 S 673-088
 (11)
 Let the disinfectant stay in the potable water system for one hour.

 S 683-044

 (12)
 Do the task to drain the potable water system (AMM 38-11-00/301).

 G. Flush the Potable Water System with Clean Water.
 S 863-045
 (1)
Fill the potable water system with clean water (AMM 12-14-00/301).

 S 173-089

 (2)  
Pressurize the potable water system (AMM 38-41-00/201).

 S 863-046

 (3)  
Open each faucet in the lavatories, galley spigot, water boiler and coffee maker for a minimum of one (1) minute.

 S 863-047

 (4)
If the taste, odor, or color of the water is bad, do these tasks:

 (a)  
Drain the potable water system.

 (b)  
Do the Flush the Potable Water System with Clean Water procedure again.

 

 S 613-048
 (5)  Service the potable water tank (AMM 12-14-00/301).
 NOTE: Flush the water system, if it is necessary with fresh water,
____ to remove the chlorine flavor from the potable water.
 H. Put the Airplane in its Usual Condition
 S 863-050
 (1)  
ALL EXCEPT LAVATORIES D AND E; turn the handle for the drain valve to SUPPLY or ON as applicable.

 S 863-079

 (2)  
Shut the secondary drain valve and then turn the water valve handle to SUPPLY or ON as applicable.

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737-300/400/500MAINTENANCE MANUAL
 S 423-032
 (3)  
In the galleys with a water filter installed, install a clean filter cartridge in the water filter.

 S 033-041

 (4)  
Remove the hose from the overflow fitting.

 S 863-057

 (5)  
Remove the DO NOT CLOSE tags and close the WATER HEATER circuit breakers on the P18 panel.
　
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