This is an oscillating piston water meter with a frost-proof bottom and serial numbers 912,409 (on the lid) and 912,413 (on the side). It fit a ⅝” pipe, and was made by the National Meter Company in ...
https://www.jstor.org/stable/jamewatworass.108.4.30 Copy URL For over a century, water meters most commonly operated according to mechanical principles - the flow of ...
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