For use in the Denver Water Service Area

Materials Specification – 17
for
Magnetic Drive Turbine Type Water Meters
3 Inch Through 16 Inch

1.

General:

All magnetic drive turbine type water meters, 3-inch through 16-inch, furnished under this standard, shall be manufactured in strict accordance with the latest edition of AWWA C701, with the following additional requirements. Meters shall be designed for easy removal of internal parts and strainer without disturbing the connections to the pipeline or removal of the meter. Strainers shall be furnished with each meter. The internal parts of the strainer shall be stainless steel. The casing of the strainer shall be provided with a removable top plate with stainless steel fasteners. Stainless steel mounting bolts and flange gaskets shall be furnished with each meter.

2.

Main Cases/Flanges:

Main cases 3 inch through 10 inch shall comply with NSF/ANSI 61 requirements. 12 inch and larger meters may be cast iron with a corrosion-resistant coating approved by Denver Water. Flanges shall be round in accordance with AWWA C701 and shall not have slotted holes. The flanges shall be an integral part of the main case and shall be of the same material. Flanges shall not be removable from the main case.

3.

Registers/Register Boxes:

Registers shall comply with AWWA C707 and shall be electronic digital encoder or mechanical encoder registers, with a permanent "potted" wire connection for Itron Encoder-Receiver-Transmitter (ERT) unit. Meters intended for pit installation shall be factory wired and potted to a wiring harness attached to a water tight quick connect terminal approved by Itron. Meters intended for indoor installation shall be factory wired and potted to a length of wire for later connection to an Itron remote ERT. Only meter brands and models with registers certified or approved by Itron, Inc., as compatible with its ERTs shall be acceptable. If the encoder registers require programming to properly operate with the Itron remote and pit ERTs, each register shall be delivered pre-programmed to provide electronic readings for 6 dials or 3 boards as appropriate for the brand of meter. Register must be compatible with Itron ERTs using standard Itron ROCLs. Registers that require the ERT to use WYSISYG-ROCLs are not acceptable.

Registers shall be straight reading, magnetic drive, U.S. gallons, dry, and permanently sealed and protected from the environment by a formed joint that can be unsealed only by destroying one or more of the components forming the joint. Registers shall comply with AWWA C701, Table 4. Number wheels or stationary zeros used for billing purposes (1,000 gallons and up) shall have black numbers against white background. All digits under 1,000 gallons (whether stationary or movable) shall be white numbers with black background.

The register shall be equipped with a test hand and test index circle or test hand and graduated test number wheel.

Register boxes shall be equipped with a register cap and shall completely cover the register lens. The register cap shall be capable of being moved to another register to preserve a match between the stamped meter numbers on the register and on the meter main case. The register box shall attach to the outer case of the meter by use of an interior or exterior locking device.

4.

Meter Numbers:

Dimpled type stamping methods and paper or plastic number labels affixed are not acceptable. The Denver Water’s meter number shall be plainly chisel stamped on the meter main case and on brass register caps. This meter number shall be heat stamped in a contrasting color on plastic register caps. Manufacturer’s serial numbers shall run consecutively for each meter in the group ordered and shall be stamped on the top of the register cap.

5.

Measuring Cages or Chambers:

Measuring cages or chambers shall be made of a copper alloy in accordance with AWWA C701.

6.

Measuring Turbines:

>Measuring turbines shall be made of materials in accordance with AWWA C701.

7.

Turbine Spindles:

Turbine spindles shall be made of stainless steel or monel.

8.

External Fasteners:

All external fasteners shall be stainless steel as described in AWWA C701.

10.

Tests:

All meters shall comply with American Water Works Association test requirements for new coldwater turbine type water meters. Each meter shall be furnished with a tag attached to the meter displaying the results of the certified accuracy tests performed by the manufacturer. This tag shall identify the meter by the manufacturer’s meter number, the Denver Water meter number, and a bar code form 39 representation of the Denver Water meter number.

11.

Acceptable Manufacturers:

AMCO Water Metering Systems, Inc.: T3000 Turbine Meter with Pulser Digital Register
Badger Meters, Inc.: Recordall Turbo Series Meter with RTR Pulser Register
Hersey Meters/Mueller Group: Horizon Turbine Meter with ER electronic register and Itron reed switch assembly
Neptune Technology Group: HP High Performance Turbine Meter with ProRead or AutoDetect absolute encoder register
Sensus Metering Systems: Series W Turbo Meter with ECR or ICE encoder register programmed to Denver Water’s specific requirements