Keystone WW Water Meter

This is a disc water meter with split case and no serial number that fit a ⅝” pipe. The Pittsburgh Meter Company introduced the Keystone meter in 1901, and the Pittsburgh Equitable Meter Company was still producing it in the late 1930s.
Currently not on view
date made
ca 1901-ca 1940
place made
United States: Pennsylvania, Pittsburgh
Physical Description
bronze (overall material)
overall: 7 1/8 in x 7 1/2 in; 18.1356 cm x 19.05 cm
ID Number
accession number
catalog number
Credit Line
A.A. Hirsch
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Water Meters
Natural Resources
Data Source
National Museum of American History


Hi I have found a water meter cap marked: Pittsburgh meter co, keystone serial number - 1258011 and on the back patented July 2 1901 - March 8 1910. It was found in Western Australia or possibly Tasmania. (Was a few years ago my memory is a little vague) do you have any info how it may have ended up there from Pittsburgh?

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