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Test and Drain Valve
The test and drain valve complies with NFPA13 sprinkler systems. Inspector’s test and drain unit w/on-off unit with brass sight glass. Female NPT inlet and outlet cast brass valve.
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Gravity Shutters
Gravity Shutters avoids heat loss and entry of wind, rain, and birds. The fins of the shutter are opened by the airflow when the fan is working and they close down by gravity when the fan is switched off.
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