Empire Type 7-AAX-H.W. Water Meter

This is an oscillating piston water meter with split case and serial numbers 1,580,254 (on the lid) and 1,666,207 (on the side). It fit a ⅝” pipe, and was made by the National Meter Company in Brooklyn, N. Y., around 1922. It has a deep base made of iron designed to neutralize the galvanic action of chemical-laden waters. AAX designates a linear register.
Object Name
water meter
date made
ca 1922
National Meter Company
Physical Description
brass (overall material)
overall: 8 1/2 in x 7 1/4 in; 21.59 cm x 18.415 cm
place made
United States: New York, Brooklyn
ID Number
accession number
catalog number
Water Meters
Measuring & Mapping
Natural Resources
See more items in
Medicine and Science: Physical Sciences
Water Meters
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
A.A. Hirsch

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