WSSC_Water_Meter_Specifications.docx

WSSC METER SPECIFICATIONS

1. WATER METER SIZES:

a. Small Positive Displacement (5/8"- 1")

b. Large Positive Displacement (l .5"-2")

c. Turbine (3"-6")

d. Ultrasonic (5/8” – 12”)

2. REQUIRED STANDARDS

2.1 AMERICAN WATER WORKS ASSOCIATION (AWWA) STANDARDS:

a. The water meters must meet or exceed the most recent revision of the following AWWA requirement standards:

i. AWWA C-700 and C710 Standard for Cold Water Meters-Displacement Type

ii. AWWA C-701 Standard for Turbine Meters

iii. AWWA C-703 Standard for Fire Service Meters

iv. AWWA C-715-18 (R22) and or C-750-19 (R23) Cold Water Meters -Electromagnetic and Ultrasonic Type for Revenue Applications and or Transit-Time Flowmeters in Full Closed Conduits

v. AWWA C714 Standard for Residential Fire Sprinkler Systems in One-and Two-Family Dwellings and Manufactured Homes

vi. Sections that apply under the AWWA M6 – Water Meters: Selection, Installation, Testing, and Maintenance.

2.2 NSF STANDARDS:

a. The water meters must meet or exceed the most recent revision of the following NSF requirement standards:

i. NSF/ANSI Standard 61 Certification

ii. NSF/ANSI 61 Annex F and G (lead requirements)

iii. NSF/ANSI 372, latest revision.

iv. Bidders must submit documentation verifying NSF certification.

v. The meters shall bear the NSF certification mark.

2.3 SAFE DRINKING WATER ACT (SDWA)

The requirements of the Safe Drinking Water Act shall apply to all meters.

2.4 AFFIDAVIT

All manufacturers are required to submit an affidavit of compliance to these standards. Nothing in this specification shall be interpreted as relieving the manufacturer, supplier, or contractor of the responsibility for furnishing a product suitable for its intended purpose. The requirements of this specification shall take precedence over those in reference documents where any contradictions may exist.

3 POSITIVE DISPLACEMENT (PD) METERS (5/8" - 2"):

a. All meters shall have cast, stamped, or embossed on them, in raised characters, the NSF certification mark, size, model and direction of flow through the meter on the main case.

b. The serial number shall be stamped or embossed on each meter main case in numerals at least 5/16" in height. Serial numbers of all meters shipped are to be sequential with no more than 10 digits and shall not repeat previously shipped meters by the same manufacturer.

c. All meters shall have a non-corrosive waterworks bronze outer case with a separate measuring chamber which can be easily removed from the case.

d. Measuring chambers shall be manufactured of synthetic material with a nutating disc. The nutating of the disc per gallon must meet AWWA C-700 standards.

e. The pressure loss through the meter at the rated capacity shall not exceed 13 psi as required in AWWA standards.

f. The 1 ½" and 2" meters can be the split case type with bronze lower and upper shell assemblies.

g. All water meter cases must be equipped with a frost protection bottom plate bronze or corrosion-resistant cast iron to prevent meter damage due to freezing temperatures on 5/8”x 5/8", 5/8”x3/4”, 3/4"x3/4", 1” and 2" meters.

h. All meters shall include strainers constructed of non-ferrous and corrosion resistant materials.

i. All meters shall be tagged with a certificate showing the meter has been tested for accuracy of registration and that it complies with accuracy and capacity requirements of AWWA C-700 with a removable serial number and barcode sticker for processing.

j. All meter main cases must have a manufacturer backed lifetime warranty.

4 TURBINE METERS (3”-6”):

a. Shall be of the vertical axis typer per AWWA Class I or (if needed) inline horizontal-axis type per AWWA Class II.

b. Main cases shall have a flanged design 3" through 6" in size and shall be round flanged per Table 3, AWWA C-701.

c. The cover shall contain a calibration vane for the purpose of calibrating the turbine measuring element while in-line and under pressure.

d. The calibration vane shall be mounted under the register that is attached in a tamper-resistant manner.

e. Casing bolts shall be made of AISI Type 316 stainless steel.

f. All meters furnished shall have a main case with a separate, easily removable measuring element. The main case shall be a solid case type with removable top or UME. A UME is a complete assembly, factory calibrated to AWWA standards that includes the cover, register, and a turbine measuring element assembly. It shall be easily field removable from the meter body without the requirement of unbolting flanges.

g. All meters shall have cast, stamped, or embossed on them, in raised characters, the NSF certification mark, size, model and direction of flow through the meter on the main case or cover.

h. The serial number shall be stamped or embossed on each meter main case in numerals at least 5/16" in height. Serial numbers of all meters shipped are to be sequential with a standard 8 digits with no more than 10 digits and shall not repeat previously shipped meters by the same manufacturer.

i. Each 3” through 6” meter ordered shall include a flanged spool piece (assembled on the outlet of the meter), if necessary, to provide the overall total laying length below:

j. The spool pieces shall be protected by a corrosion-resistant coating and lining such as fusion-bonded epoxy in accordance with AWWA C-702. The spool pieces shall be bolted to the meter with two ring/drop gaskets with one or more annular rings molded into the gasket and type 316 stainless steel nuts and bolts with a fluoropolymer coating to prevent galling. Each spool piece shall include a 2” tapped boss on the top of the spool piece, near the meter outlet, for field testing purposes. A test port assembly shall be assembled (using an appropriate NSF approved thread sealant) but not installed on the boss. The test port, consisting of the following, shall be included in the meter crate and packaged so that it is protected in transit from damage:

· a close (threaded entire length) 2" diameter National Pipe Thread (NPT) brass pipe nipple

· a 2" bronze ball valve (Female NPT curb stop, key operated)

· a close (threaded entire length) 2" diameter NPT brass pipe nipple

· a 2" Female Pipe Thread (FPT) x 2-1/2" male National Standard Thread (NST) adapter

· a 2” bronze cap (FNST threads)

5 ULTRASONIC (5/8” – 12”):

a. The meters shall be in accordance with AWWA C -750, “standard for transit-time meters”, latest revision and or C-715, “cold-water meters-electromagnetic and ultrasonic type, for revenue applications, latest revision or C714 “standard for residential fire sprinkler systems in one-and two-family dwellings and manufactured homes” or latest revision.

b. Shall be made of a grade 316 stainless steel equaling or exceeding ASTM standards A351 or A743 or bronze main case meters shall comply with the AWWA standard C-700, latest revision "cold-water meters-displacement type, bronze main case”.

c. Main cases shall have a flanged design 1.5" through 12" in size and shall be round flanged per Table 3, AWWA C-701.

d. All external bolts, nuts, and washers shall be in accordance with AWWA standards, and shall be fabricated of stainless steel or a metal compatible with the meter casing.

e. The measuring chamber shall be a self-contained unit, smoothly finished, unitized, and completely integral to the meter body.

f. The measuring section shall not include any moving parts and shall have an unobstructed flow passage area at least equal to fifty percent (50%) of the nominal schedule 40 pipe size corresponding to the meter’s size. the measuring chamber shall be secured in the main case to ensure the accuracy of the meter will not be affected by any distortion of the cases that might occur when operating with a pressure less than 150 pounds per square inch.

g. The measuring chamber shall be in accordance with AWWA C-750, sec 3.6. and or C-715, sec 4.1.3 the measuring chamber shall have a minimum heat distortion temperature of 150 to 200 degrees Fahrenheit.

h. Transit-time flowmeters may be single-path or multipath and arranged in either direct or reflective mode. in a direct mode, the transducers are installed on the opposite sides of the pipe. in a reflective mode, the acoustic energy is reflected off the inside of the pipe wall to another transducer. multipath flowmeters must have a pair of transducers for each path in the measurement section.

i. Measurements shall be sampled at a minimum of one (1) second intervals of these transit-time loops to provide accuracy at all flow rates. meters using single directional sound transmission to determine flow measurements are not acceptable.

j. The capacity of the chambers shall be in accordance with AWWA standards.

k. The glass shall be inserted in a manner that affects a hermetic seal and shall be shock resistant, i.e., the heavy molded type, and shall be in accordance with AWWA standard C-750, section 4.3.3. and or C-715, section 4.3.6.

l. The manufacture guarantees that the meters shall register within the limits specified at a working pressure of 150 pounds per square inch and withstand a static pressure of 250 pounds per square inch without leakage or failure of any part.

m. All meters shall have cast, stamped, or embossed on them, in raised characters, the NSF certification mark, size, model and direction of flow through the meter on the main case or cover.

n. The serial number shall be stamped or embossed on each meter main case in numerals at least 5/16" in height. serial numbers of all meters shipped are to be sequential not more than 8 digits and shall not repeat previously shipped meters by the same manufacturer.

o. Each 3” through 12” meter ordered shall include a flanged spool piece (assembled on the outlet of the meter), if necessary, to provide the overall total laying length below:

p. The spool pieces shall be protected by a corrosion-resistant coating and lining such as fusion-bonded epoxy in accordance with AWWA C-702. The spool pieces shall be bolted to the meter with two ring/drop gaskets with one or more annular rings molded into the gasket and type 316 stainless steel nuts and bolts with a fluoropolymer coating to prevent galling. Each spool piece shall include a 2” tapped boss on the top of the spool piece, near the meter outlet, for field testing purposes. A test port assembly shall be assembled (using an appropriate NSF approved thread sealant) but not installed on the boss. The test port, consisting of the following, shall be included in the meter crate and packaged so that it is protected in transit from damage:

· a close (threaded entire length) 2" diameter National Pipe Thread (NPT) brass pipe nipple

· a 2" bronze ball valve (Female NPT curb stop, key operated)

· a close (threaded entire length) 2" diameter NPT brass pipe nipple

· a 2" Female Pipe Thread (FPT) x 2-1/2" male National Standard Thread (NST) adapter

· a 2” bronze cap (FNST threads)

q. All meters shall be tagged with a certificate showing the meter has been tested for accuracy of registration and that it complies with accuracy and capacity requirements of AWWA C-715-18 (R22) and or C-750-19 (R23) and or C 714 with a removable serial number and barcode sticker for processing.

r. All meter main cases must have a manufacturer backed lifetime warranty.

6 ENCODER REGISTER UNIT:

a. An ordering specification sheet will be required for each meter shipment so that the visual and electronic readings through radio Meter Interface Units, have the desired resolution/output needed for billing.

b. The self-contained solid state absolute encoder registers metering system shall be designed to obtain remote simultaneous water meter registration that is guaranteed to exactly match the registration on the register odometer.

c. The unit shall transmit a meter reading for transmission through a radio or register integrated Meter Interface Unit (MIU).

d. The manufacturer will guarantee that the reading obtained electronically matches the reading on the register.

e. The register shall display in gallons.

f. The meter size shall be permanently marked on the register dial face, permanently sealed, and three terminals pre-potted by the manufacturer

g. All wire required in this specification shall be 22 American Wire Gauge (AWG) three strand.

h. Meters 5/8th -1inch in size shall be furnished with a minimum of 18inches of 22 AWG 3-strand wire for inside meters, 24inches for outside meters terminating in a pit pad reader.

i. Meters 1 ½ - 2inch in size shall be furnished with a minimum of 6ft for both inside and outside meters 22 AWG 3-strand wire terminating in a male Nicor connector.

j. Meters 3inch – 12 inch in size shall be furnished with a minimum of 25ft of 22 AWG 3-strand wire terminating in a male Nicor connector.

k. Digital registers will indicate total consumption, reverse flow, rate of flow, low battery indication, leak alert, as well as no flow condition through the meter.

l. The register shall attach to the meter in such a manner as to prevent tampering or removal.

7 PACKAGING-DELIVERY:

METERS:

a. Each meter shall be packaged, large meters individually, in a suitable wooden carton or box which provides adequate protection from damage.

b. A certificate of test accuracy shall be supplied with each delivered meter which attests that the meter registers at or within the accuracy parameters stated per meter type and size attached.

c. The test tags shall be affixed to each meter and shall state the meter test results (showing that the meter is accurate at minimum, intermediate, and maximum flows), the date of manufacture, the test bench where it was tested, and the date of the test.

d. A summary file detailing meter serial numbers, test results, date of purchase, contract number and purchase order number in a Microsoft excel format shall be supplied to the Contract Manager via email.

e. Cartons will be stretch wrapped on 42" x 42" four-way entry perimeter base pallets, stacked no more than 40” high (including the height of the pallet).

f. Crates for 3” through 12” meters shall not exceed 40 inches in height and shall be suitable for forklift handling.

g. Pallets will be stretch wrapped and shall be marked on all four sides with manufacturer's name, meter size, WSSC stock number, delivery release number, serial number range of meters on pallet, and number of meters with one half inch size lettering or larger except for the WSSC stock number which shall be in one inch size lettering or larger.

h. Only one size meter per pallet will be accepted.

i. Cartons shall be stacked on pallets in serial number order with the lowest number on top and the highest on the bottom. Cartons on the outer sides of the stacks shall be stacked with the labels facing outward so they can be read without unstacking the cartons.

j. Cartons shall be labeled with the carton number, e.g., 1 of 50, 2 of 50, etc., the WSSC stock number, delivery release number, the manufacturer’s part number, manufacturer’s description, and serial number range within carton.

k. Large meter crates shall include weight in one inch size font or larger.

l. Failure to comply with these packaging requirements may be grounds for rejection of the shipment.

REQUIRED METER ACCESSORIES:

a. The accessories in this section are required to be included in each meter package based on the type.

b. A quantity of 2 gaskets shall be provided for each 5/8" through 1" meter. Gaskets shall be shipped in cartons marked "gaskets". Gaskets shall be packed in bags of 200 each and marked with quantity and size.

b. Each shipment shall include a document with the manufacturer's instructions on how to read the register and how to interpret the register sweep hand/display, or those instructions must be easily available on the manufacturer’s website.

c. Large meters will have the correct number of bolts, nuts and washers made of bronze or stainless-steel meeting the requirements of AWWA C-700 (latest revision) with the exception of the nuts and bolts for external flanges. Nuts and bolts for external flanges shall be of type 316, and or 430 stainless steel with fluoropolymer coating and or coating to prevent galling. Two ring/drop gaskets with one or more annular rings molded into the gasket, shall be furnished with each meter. The required quantities of nuts and bolts for each size of meter are as follows:

Size Quantity 1.5” 4 2” 4 3” 8 4” 16 6 - 8” 16 10 - 12” 24

8 TESTING AND INSPECTION:

a. At the sole discretion of the commission, each shipment will be tested for accuracy, materials, and workmanship requirements.

b. A random sample of ten percent (10%) from each shipment of each size meter may be tested.

c. If all tested meters meet the requirements, the shipment will be accepted.

d. If (5%) or more of the tested meters fail to meet the requirements, another (10%) of the shipment will be tested.

e. If less than three percent (3%) of the total number of both groups of tested meters fail, the shipment will be accepted.

f. If three percent (3%) or more of all meters from both groups of tested meters fail, the total shipment will be rejected and a replacement shipment requested. in any event, all meters that fail inspection for any reason will be rejected and replacements requested.

g. The following criteria will be used when testing for registration accuracy.

* accuracy limits:

* minimum rate (all sizes)= 98.5-101.5% *

* intermediate rate (all sizes)= 98.5-101.5%*

* maximum rate (all sizes)= 98.5-101.5% *

9 WARRANTY- REJECTION:

a. Any meter found to fail the accuracy test, to be leaking, or which fails inspection shall be rejected.

b. The warranty for meters furnished shall be for a period of not less than ten (10) years from the date of acceptance by the Commission as follows:

i. Against all faulty or defective materials and workmanship; and

ii. To operate satisfactorily, accurately, and in accordance with the specifications herein; and

iii. Meters will operate to the following AWWA standards:

· 5/8" meter - AWWA new meter accuracy standards for the period from acceptance to the end of year 5 or 500,000 gallons, whichever comes first.

· 3/4" meter - AWWA new meter accuracy standards for the period from acceptance to the end of year 5 or 750,000 gallons, whichever comes first.

· 1" meter - AWWA new meter accuracy standards for the period from acceptance to the end of year 5 or 1,000,000 gallons, whichever comes first.

c. Manufacturer liability and remedy under the warranty is limited to replacement of the meter(s) and conditioned upon the Commission returning the meter(s) to the location designated by the Manufacturer within the warranty period stated. Any shipping charges incurred in connection with any meters returned will be the sole responsibility of the supplier.

d. If 10% or more of the meters supplied under the contract fail, following installation, to perform as warranted, the meter shall be grounds for contract termination.

e. The manufacturer’s warranties are in addition to, and not in lieu of, the warranty obligations as stated herein. Should the manufacturer's warranty exceed the commission's warranty requirement of 10 years, the manufacturer's warranty shall supersede the Commission's warranty. All other terms and conditions of the Commission's warranty shall remain the same.

f. Potted pit-set meters shall be warranted as a unit. The supplier shall be notified when meters have failed under warranty. Those meters shall be returned to the supplier for credit within 30 days after notification at the expense of the supplier.

g. Meters not complying with all requirements of these specifications shall be rejected.

h. Meters containing defects in materials and workmanship shall be rejected.

i. All rejected meters will be removed by the supplier at the expense of the supplier. The supplier shall remove the rejected meters or implement some other problem resolution strategy directed by the Commission within ten (10) days of notification that the meters have been rejected. Failure to either remove the meters or reach an agreement with the Commission on a problem resolution strategy within ten (10) days of notification will result in return of the meters at the supplier's expense.

j. The manufacturer shall replace or satisfactorily correct all rejected meters at the request and option of the Commission in no more than 30 calendar days.

k. Upon request, the Commission will provide the test results for any rejected meter which fails the accuracy testing requirements included with this specification.

l. Meters rejected for failing to meet the accuracy requirements of this specification shall not be returned to the Commission under this or any future purchases.

m. Should a replacement shipment also be rejected for inaccurate registration, the rejection shall be cause for termination of the contract.