NIPPLE - FLUSH PORT 38-32-14
Removal/Installation 401 ALL
TIMER - TOILET 38-32-11
Removal/Installation 401 ALL
WASTE TANK - TOILET 38-32-51
Removal/Installation 401 ALL
AIR SUPPLY__________ 38-40-00
WATER TANK PRESSURIZATION SYSTEM 38-41-00
Description and Operation 1 ALL
General 1
Filter - Air 1
Regulator - Pressure 1
Restrictor - Air Flow 1
Valve - Check 4
Valve - Pressure Relief 1
Maintenance Practices 201 ALL
Water Tank Depressurization 201
Water Tank Pressurization 202
38-CONTENTS
BEJ Page 3 Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
CHAPTER 38 - WATER AND WASTE
TABLE OF CONTENTS_________________
Chapter
Section
Subject Subject Page_______ _______ ____ Effectivity___________
AIR FILTER - WATER TANK 38-41-11
PRESSURIZATION SYSTEM
Servicing 301 ALL
Removal/Installation 401 ALL
PRESSURE REGULATOR 38-41-22
Maintenance Practices 201 ALL
PRESSURE RELIEF VALVE 38-41-21
Maintenance Practices 201 ALL
38-CONTENTS
BEJ Page 4 Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WATER AND WASTE - DESCRIPTION AND OPERATION
___________________________________________
1. General_______
A. The water and waste system is composed of four independent but related systems (Fig. 1). The passenger water system stores, delivers, monitors and controls drinkable (potable) water for the galley unit and lavatory sink basins (Ref 38-11-00, D&O). This system contains electric water heaters that heat the water supplied to the hot water taps in the lavatory sinks. The toilet system provides sanitary toilets in the lavatory compartments and a means to dispose of toilet waste. The waste water system disposes of all waste water from the lavatory compartments by draining it into the toilet tanks (Ref 38-31-00, D&O). The water tank pressurization system causes the passenger water system to be evenly pressurized at all times (Ref 38-41-00, D&O).
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38-00-00
ALL ú ú 02 Page 1 ú Jun 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
AIR SOURCE
WATER SERVICE PANEL
PANEL
AIR FRESH WATER WASTE
Water and Waste Block Diagram
Figure 1
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38-00-00
ALL ú ú 02 Page 2 ú Oct 20/83
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
T82001
1.
2.
3.
A
737-300/400/500MAINTENANCE MANUAL
PASSENGER WATER SYSTEM - DESCRIPTION AND OPERATION
__________________________________________________
General
_______
A. The Passenger Water System Stores, supplies, and drains fresh water for the lavatories and galleys. Fresh water is held in the potable water tank located within the area aft of the bulk cargo compartment.
B. Each lavatory has a drain valve located below the cylindrical water heater in the lower part of the sink cabinet (Fig. 2 and 3). The drain valve controls potable water drainage and supply in the lavatory compartment. The lavatory washbasins each have a faucet with hot and cold water. The faucets are self-venting. This allows automatic bleeding of air from the system, and allows draining the system without opening the faucet.
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