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connections to the water heater, or the water heater itself,
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the tank or related water piping is directed to an adequate
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water heater. When used with a fuel-fired heater, this drain
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METAL
DRAIN
PAN
AT LEAST 2” (50.8 mm) GREATER THAN
THE DIAMETER OF THE WATER HEATER.
PIPED TO AN
ADEQUATE DRAIN
12” (300 mm)
MAXIMUM AIR GAP
DISCHARGE PIPE
(DO NOT CAP OR PLUG)
FIGURE 2.
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water heater is installed. Water heaters are sometimes
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• Sensors mounted in the metal drain pan that trigger an
alarm or turn off the incoming water to the water heater
when water is detected.
• Sensors mounted in the metal drain pan that turn off the
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the metal drain pan.
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water pipes connected to the water heater.
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REVERSE FLOW
OF GASES
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FIGURE 3.
Clearances And Accessibility
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thermostat of the water heater.
The water heater is certified for installation on a
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the panel.
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the specific clearance locations. A minimum of 610mm
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BACK
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FIGURE 4.