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a permanent part of the tank.
Training Information Point
The 62.1 gallon tank can have these sizes of standpipes:
* 40 gallon (151 liter)
* 50 gallon (189 liter)
* 60 gallon (227 liter).
The standpipes are interchangeable for different route
requirements. When you install a different standpipe, you
must also change the water quantity transmitter adapter cable.
If you do not use the correct transmitter adapter cable, the water
quantity indicator will not show the correct water level.
WATER/WASTE - PASSENGER WATER SYSTEM - WATER TANK
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-11-00-001
WATER/WASTE - PASSENGER WATER SYSTEM - WATER TANK
WATER/WASTE - PASSENGER WATER SYSTEM - WATER TANK
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-11-00-001
Purpose
The lavatory water supply shutoff valve lets you isolate the flow
of water to the lavatory components.
Location
Each lavatory has a lavatory water supply shutoff valve. You
open the sink cabinet door to get access to the valve. The valve
is in the lower area of the cabinet.
Physical Description
The lavatory water supply shutoff valve is a four-way valve. The
valve has a valve body and a control handle (yellow with a red
indicator point). These four positions show on the valve body:
* OFF
* TOILET ONlY
* SUPPLY ON
* FAUCET ONlY.
The valve has one line in and two lines out.
Functional Description
The valve handle lets you turn the valve to one of four positions.
When you turn the valve to the OFF position, the valve shuts off
water to all of the lavatory components.
In the TOILET ONLY position, water goes to the toilet only.
In the SUPPLY ON position, water goes to the faucet and toilet.
In the FAUCET ONLY position, water goes to the faucet only.
Training Information Point
Before you work on the lavatory components, turn the lavatory
water supply shutoff valve to the OFF position. When you turn
the valve to the OFF position, water will not flow through any
open lines.
You must turn the lavatory water supply shutoff valve to the
SUPPLY ON position when you drain the lavatory supply lines. If
you do not turn the valve to the SUPPLY ON position, then the
water will not drain from the faucet or toilet supply lines.
WATER/WASTE - PASSENGER WATER SYSTEM - LAVATORY WATER SUPPLY SHUTOFF VALVE
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-11-00-007
WATER/WASTE - PASSENGER WATER SYSTEM - LAVATORY WATER SUPPLY SHUTOFF VALVE
WATER/WASTE - PASSENGER WATER SYSTEM - LAVATORY WATER SUPPLY SHUTOFF VALVE
EFFECTIVITY
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D633A101-GUN Oct 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-11-00-007
Purpose
The forward lavatory drain valve lets you drain the water from
the forward lavatory supply lines.
Location
The forward lavatory drain valve is only in lavatory A (the most
forward lavatory). You remove the sink cabinet panel to get
access to the valve. The valve is in the lower area of the
cabinet.
Physical Description
The forward lavatory drain valve operates manually. The valve
has a valve body and a red handle.
Functional Description
The handle lets you put the valve in the OPEN or CLOSE
position.
In the OPEN position, the forward lavatory drain valve lets the
water drain from all the forward lavatory and galley supply
lines. The water drains through the forward potable water drain
port.
In the CLOSE position, the water from the supply lines flows to
the lavatory and galley components. Water does not flow
overboard.
A placard shows the valve in the OPEN and CLOSE positions.
Training Information Point
You must put the forward lavatory drain valve in the CLOSE
position before you operate the water system. If you do not put
the valve in the CLOSE position, water will drain from the
forward lavatory during operation.
WATER/WASTE - PASSENGER WATER SYSTEM - FORWARD LAVATORY DRAIN VALVE
EFFECTIVITY
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D633A101-GUN Oct 10/2002
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WATER AND WASTE(7)
