1. General:

All magnetic drive compound type water meters 3 inch through 6 inch, furnished under this standard, shall be manufactured in strict accordance with the latest edition of AWWA C702, with the following additional requirements. The displacement section of the meter may be of a disc or oscillating piston type. Meters shall be designed for easy removal of internal parts without disturbing the connections to the pipeline or removal of the meter. A tapped boss shall be provided near the outlet of the meter to provide for field-testing without removal of the meter. Stainless steel mounting bolts and flange gaskets shall be furnished with each meter.

2. Main Cases/Flanges:

Main cases shall comply with NSF/ANSI 61 requirements. Flanges shall be four hole round type 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, and permanently sealed and protected from the environment and tampering 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 C702, Table 5. 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 number on the register cap and on the meter main case. The register box shall attach to the case of the meter by use of interior or exterior locking devices

4. Meter Numbers:

Dimple type stamping methods and paper or plastic number labels affixed to the register are not acceptable. The Denver Water 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. The Denver Water meter number shall also be attached to the meter in bar code form 39 using a separate tag.

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. Piston/Disc Spindles, Thrust Rollers, and Thrust Roller Bearing Plates:

Piston/disc spindles, thrust rollers, and thrust roller bearing plates shall be of monel or stainless steel in accordance with AWWA C702.

6. Chambers:

Chambers shall be made of copper alloy containing not less than 85% copper.

7. Measuring Chamber Diaphragms:

Measuring chamber diaphragms shall be of monel or stainless steel in accordance to AWWA C702.

8. Drive Spindle:

Up shaft or drive spindle shall be stainless steel or suitable engineering plastic. Driving pawl and magnet shall be securely fastened to drive spindle in a manner preventing loss of pawl during normal operation of the water meter.

9. External Fasteners:

All external fasteners shall be stainless steel as described in AWWA C702.

10. Torrent Section:

The torrent section shall be constructed in accordance with AWWA C702 and will be provided with stainless steel fasteners.

11. Tests:

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

12. Acceptable Manufacturers:

AMCO Water Metering Systems, Inc.: C3000 with Pulser Digital Registers
Badger Meters, Inc.: RCDL Compound Series Meter with RTR Pulser Register
Hersey Meters/Mueller Group: MCTII Series Compound Meter with ER electronic register and Itron reed switch assembly
Neptune Technology Group: Tru/FLO Compound Meter with ProRead or AutoDetect absolute encoder registers
Sensus Metering Systems: SRH Compound Meter with ECR or ICE encoder register programmed to Denver Water’s specific requirements