D.  Fill system with chlorinated water which contains 50 or 100 parts per million of chlorine (Chapter 12, Water System - Servicing).
(1)  Water may be chlorinated in three different ways.
(a)  
A concentrated chlorine solution may be introduced first and then the system filled with drinkable water.

(b)  
Concentrated chlorine solution may be mixed with drinkable water first and then pumped into system.

(c)  
Concentrated solution may be added while system is being filled.

E.  After system is filled with chlorinated water and chlorinated water has appeared at overflow
fitting on service panel, close fill and overflow valve. F Pressurize system (AMM 38-41-0/201).
G.  Open each lavatory faucet until chlorinated water appears at each. At each galley open water outlet(s) until chlorinated water appears at each.
H.  At each lavatory proceed as follows: 
(1)  
Position 3-way supply/drain valve to OFF.

(2)  
On airplanes with forward lavatory, with secondary drain valve installed, position the drain valve to CLOSED.

(3)  
At each forward lavatory, if applicable, position vent valve handle to DRAIN.

(4)  
At each aft lavatory, if applicable, position vent valve handle parallel to airplane centerline.

(5)  
Open both faucets to allow water to flow through vent line. Close faucets.

I.  Connect hose from chlorinated water source to fill connection.
J.  Connect a length of hose to overflow fitting to avoid contact with chlorinated water under pressure.
K.  Slowly open fill and overflow valve.
L.  Top off tank with chlorinated water (Ref step D).
M.  Let chlorinated water stand in system for 1 hour if filled with 50 parts per million of acidified chlorine or 100 parts per million of chlorine (not acidified) solution. Let chlorinated water stand for 4 hours if filled with 50 parts per million of chlorine (not acidified).
N.  Drain system (Ref par. 2 or 3).
O.  Fill system with drinkable water (Ref Chapter 12, Water System - Servicing).
P.  Repeat steps E thru O, substituting drinkable water for chlorinated water, as many times as necessary until chlorine contents in water is not objectionable.
Q.  Return system to normal as follows: 
(1)  
At each lavatory position three-way supply/drain valve handle to ON. At each forward lavatory position vent valve handle, if applicable, to ON. At each aft lavatory position vent valve handle, if applicable, pointing into sink cabinet.

(2)  
Install clean filter cartridges and coffeemaker as applicable.

(3)  
Remove hose from overflow fitting.

May 01/00 38-11-0 Page 303 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

PASSENGER WATER TANK - REMOVAL/INSTALLATION
1.  Prepare for Removal
A.  Drain water tank by opening fill and overflow valve and drain valve.
B.  Depressurize water tank. Refer to 38-41-0, Water Tank Pressurization System - Maintenance Practices.
C.  Close drain valve and fill and overflow valve.
D.  Open WATER QTY IND circuit breaker on panel P18.
E.  Remove aft cargo compartment rear bulkhead access panels. (See figure 401.)
2.  Remove Passenger Water Tank
A.  Disconnect electrical connector from water quantity transmitter.
B.  Disconnect air pressure, fill, overflow, supply and drain lines from water tank.
NOTE: Obtain access through insulation blanket. Blanket is attached by Velcro tape.
C.  Remove drain valve adapter connecting pin and two washers, and pull valve handle on water service panel, to disconnect valve actuator shaft coupling from adapter.
D.  Loosen upper and lower attachment bolts on struts on forward side of tank.
E.  Remove attachment bolt assembly from aft side of tank. (See view 1.) Bolt attaches to a nutplate on outboard end.
F.  Remove upper attachment bolts and washers from struts on forward side of tank. Swing struts forward.
506 
Jul 15/70  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  38-11-11 Page 401 

F90684 F90806
 Passenger Water Tank Installation  500 
38-11-11  Figure 401 (Sheet 1)  Aug 15/69 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Passenger Water Tank Installation 
　
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