New York Codes Rules Regulations (Last Updated: March 27,2024) |
TITLE 16. Department of Public Service |
Chapter V. Waterworks Corporations |
Subchapter A. Service |
Part 500. Meter Approvals; Testing of Meters; Reports of Testing |
Sec. 500.2. Types of meters
Latest version.
- Service meters covered by this Part in use for measuring water delivered to consumers are divided into four general classes, as follows: displacement, current, compound, and fire-service.(a) Displacement meters.Displacement meters are known by the motion of the piston, as reciprocating, rotary, oscillating, and nutating disc meters. These meters are positive in action and displace or carry over a fixed quantity for each stroke or revolution of the piston or disc.(b) Current meters.Current meters are nonpositive in action, but record the flow by the number of revolutions of a water wheel or propeller, which is set in motion by the force of the flowing water coming in contact with the wheel or propeller blades.(c) Compound meters.Compound meters consist of a combination of a mainline meter of the current or displacement type for measuring large flows and a small by-pass meter of the displacement type for measuring small flows, together with an automatic valve mechanism for diverting the small flows through the by-pass meter.(d) Fire-service meters.Fire-service meters are compound meters consisting of a main-line meter of the proportional type for measuring large flows and a small by-pass meter of the displacement type for measuring small flows together with an automatic valve mechanism for diverting the small flows through the by-pass meter. The combination is designed to afford a clear passage through the meter when the valve is raised from its seat.