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		                        | National Stock Number:
 4820-00-824-9581
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 008249581
 
 Description:
 VALVE,VACUUM BREAKING
 
 Detail:
 AN ITEM DESIGNED TO AUTOMATICALLY RELIEVE VACUUM, BY THE INTAKE OF AIR, WHEN THE INTERNAL PRESSURE FALLS BELOW ATMOSPHERIC PRESSURE. SEE ALSO VALVE, VACUUM REGULATING.
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 Manufacturer Information:
 
 | 36 | 79227 | WATTS REGULATOR CO |  | 36A1/2IN | 79227 | WATTS REGULATOR CO |  | N36-1/2INCH | 79227 | WATTS REGULATOR CO | 
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 Techincal Specification:
 
 | ABSOLUTE PRESSURE SETTING | 4.0 |  | BODY STYLE | SINGLE CONNECTION, STRAIGHT FLOW |  | END CONNECTION QUANTITY | 1 |  | FIRST END CONNECTION TYPE | THREADED EXTERNAL PIPE |  | FIRST END STYLE DESIGNATOR | PLAIN |  | FIRST END THREAD DIRECTION | RIGHT-HAND |  | FIRST END NOMINAL PIPE SIZE ACCOMMODATED | 0.500 INCHES |  | FLOW CONTROL DEVICE | DISK, BOTTOM GUIDED |  | MATERIAL | COPPER ALLOY BODY |  | MATERIAL | COPPER ALLOY SEAT |  | MEDIA FOR WHICH DESIGNED | AIR |  | SPECIAL FEATURES | 13.5 CFM VENTING CAPACITY |  | TEMP RATING | 250.0 FAHRENHEIT |  | TEMP ADJUSTABILITY | NOT ADJUSTABLE | 
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