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APPLICATION ASSISTANCE


WATER METER SPECIFICATIONS

GENERAL

The Groundwater Management Act, K.S.A. 82a-1020, provides the Board of Directors, Equus Beds Groundwater Management District No. 2, with authority to require water users to install water meters on wells.

It is the purpose and intent of these specifications to define the minimum criteria for water meters which are required by the Board of Directors under the District's rule and regulation K.A.R. 5-22-4a.

WATER USER'S RESPONSIBILITIES

The water user must: a) select the proper size, pressure rating, water meter style, and meter operating range to fit the installation; b) properly install the water meter in accordance with the District's requirements and the manufacturer's instructions; c) maintain the water meter in an operating condition at all times during diversion of water; and d) ensure the water meter measures the total discharge from the well and does not measure any other discharge.

BASIC REQUIREMENTS

It is not intended to restrict water meters furnished under these specifications to any particular style, configuration, or manufacturer; however, meters of all types shall meet District approval and the following requirements:

Registration Accuracy - The water meter shall be calibrated at the factory and shall be certified to register not less than 98 percent nor more than 102 percent of the actual volume of water passing the meter. This requirement shall be met throughout the meter's normal operating range.

Meter Body, Register and Indicator - The water meter shall be designed and constructed to:

  • maintain the required accuracy;


  • be protected by a tamperproof manufacturer's seal;


  • clearly indicate the direction of water flow;


  • clearly indicate the serial number of the water meter;


  • have a weatherproof register that is sealed from all water sources;


  • have a register that is readable at all times;


  • be able to be sealed by an authorized representative of the Chief Engineer to prevent tampering or removal of the meter;


  • be equipped with a manufacturer approved measuring chamber or tube through which all water flows:


  • be equipped with flow straightening vanes, installed at the upstream throat of the water meter chamber or tube;


  • be equipped with an inspection port if the straightening vanes are not designed, constructed and installed by the manufacturer;


  • remain operable without need for recalibration to maintain accuracy throughout the meter life;


  • have a totalizer that:


    • is continuously updated to read directly in acre-feet, acre-inches or gallons;


    • has sufficient capacity, without cycling past zero more than once each year;


    • reads in units to discriminate annual water use to within the nearest 0.1 percent of the total annual permitted quantity;


    • has a direct read dial or a counter that can be timed to accurately determine the rate of flow; and


    • has a nonvolatile memory.

INSTALLATION

The meter shall be installed in accordance with the manufacturer's instructions and in such a manner to insure full pipe flow and normal operating flow range at all times while water is being pumped. The meter shall be installed at a location that will measure all water diverted from the source of supply.

The meter shall be placed in the line with a minimum of 5 pipe diameters of straight pipe without flow obstructions upstream of the meter sensor and at least 2 pipe diameters of straight pipe without flow obstructions downstream of the meter sensor.

Where manufacturer's specifications are most stringent, they shall govern.

Important Note: Most meter manufacturers require more than 5 pipe diameters of upstream-unobstructed straight pipe, and may require additional unobstructed downstream straight pipe.

For additional information on specific manufacturer's installation requirements, contact the Equus Beds Groundwater Management District.


McCrometer Meter Installation Example

There must be an unobstructed straight run of pipe upstream of the meter propeller sufficient for turbulent water to settle down to smoother flowing conditions. Any exaggerated jetting action or adverse flow restrictions upstream may need additional unobstructed straight run for proper meter operation. Flow straightening vanes are installed directly in front of the meter propeller in the required manufacturer's measuring chamber or tube (see figure 1).

Minimum Installation Requirements:

  • Installations in non-jetting flow conditions after pump discharges, pipe bends, heat exchangers and other non-jetting flow mechanisms, require a minimum of 5 pipe diameters of unobstructed straight pipe upstream of the meter propeller.


  • Installations in jetting flow conditions after check valves, pressure regulating valves, pipe restrictions and other jetting flow mechanisms, require a minimum of 5 pipe diameters of unobstructed straight pipe upstream of the meter propeller. However, it is strongly recommended that the meter be installed with a minimum of 10 or more pipe diameters of unobstructed straight pipe upstream of the meter propeller to ensure accurate meter operation and to prevent meter damage.


  • There must be a minimum of 1 pipe diameter of unobstructed straight pipe downstream of the meter register head.


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