Technical Specifications for One Half Inch Single-Jet Water Meters (DN-13mm) - Requirements

Oct 17, 2026

Upload by Marglet

Technical specifications define one half inch single-jet water meters with nominal diameter DN-13 mm, designed for measurement of cold potable water. The document specifies ISO 4064 standard, metrological class B, brass meter body requirements with at least 75% copper, magnetic ring/shield register, registration in cubic meters with straight reading, and defined permissible errors across flow rates. It also sets working pressure and temperature limits, tailpiece length ranges, sealing, strainer, serial numbering, painting requirements, packaging batches, and post-qualification sample submission rules.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages1

Reading Time3 min

AccessFree to download

Specifications

Standard and Meter Details

Working Conditions and Metrological Characteristics

Dimensions, Sealing, and Markings

Other Post-Qualification Requirements

TECHNICAL SPECIFICATIONS FOR ONE HALF INCH SINGLE-JET WATER METERS(DN-13mm) | SPECIFICATIONS | | | | | | --- | --- | --- | --- | --- | | Designed for the measurement of cold potable water | | | | | | 1.Standard | ISO 4064 | | | | | 2.Nominal Diameter | DN-13mm | | | | | 3.Meter Type | Single Jet | | | | | 4.Metrological Class | B | | | | | 5.Meter Body | Brass(Copper and Zinc Alloy)
at least 75%Copper
- Testing result of Copper content of the meter body from
DOST-accredited laboratory shall be submitted on or be
opening of bids. | | | any
fore | | 6.Register | With magnetic ring/shield | | | | | | Meter Register in Cubic Meters | | | | | | Cubic Meters in registration-minimum of 4 digit | | | | | | Straight Reading | | | | | 7.Working Condition | Maximum Working Pressure:10 bars or 1.0Mpa | | | | | | Maximum Working/Liquid Temperature:30℃ or Higher | | | | | 8.Metrological Characteristics
(Permissible Error) | ±5%
a.Minimum Flow Rate: | | | | | | b.Transitional Flow Rate: ±2% | | | | | | c.Maximum Flow Rate:
±2% | | | | | 9.Meter and corresponding
Tailpiece length ranges | | Length per Tail Piece
Water Meter Length | | | | | | 115mm
100mm | | | | | | 165mm
75mm | | | | | | 190mm | 63mm | | | 10.Meter Seal | Meter body should be properly sealed | | | | | 11.Strainer | With plastic strainer installed | | | | | 12.Serial Numbering | Meter numbers should be in series,clearly and permanently
engraved | | | | | 13.Painting | All water meters shall be painted with acrylic Tahiti blue(or clos
shade acceptable to the end user)automotive paint with prope
primed surface of compatible paint primer. | | | er
rly | | 14.Meter Body Markings | Meter Size | | | | | | Flow Direction(arrow) | | | | | 15.Packaging | All water meters shall have plastic end cap installed on both me
body thread ends | | | ter | | | Each water meter shall be packed individually in a small box and
must contain 2 tailpieces and rubber gaskets | | | | | | The water meters shall be packed by 10's or 20's per batch and
indicate the meter serial numbers on the box. | | | shall | | 16.Other requirements | Five (5)unit samples complete with tail pieces and gaskets with
testing result from Manila Water to be submitted by the lowest
bidder during post-qualification which shallform part of the del
(Applicable for brand and model of water meters that have ng
undergone testing from Manila Water and its results have no
been submitted to this Office.) | | | the
ivery.
t | | | One (1)unit cut away sample to be submitted by the lowest bid
during post-qualification.
(Applicable for brand and model of water meters that have nd
been submitted to this Office.) | | | der
t | Reviewed by: Approved Bnedy Prepared by: Aguilera 20 Louella Arsena G w Date: 2022.01.2808: 22:02+0800' Ronan M.Tarroza Alva Marie C.Conti Louella A.Aguilera Customer Service Officer,WMMD OIC,General Services Department OIC,WMMD

FAQs

What standard and metrological class are specified for the water meter?

The meter must comply with ISO 4064 and have a metrological class of B.

What are the allowed working pressure and liquid temperature?

The maximum working pressure is 10 bars (1.0 Mpa), and the maximum working/liquid temperature is 30°C or higher.

What permissible errors are listed for different flow rates?

Permissible error is ±5% with a minimum flow rate, ±2% for the transitional flow rate, and ±2% for the maximum flow rate.

Oct 17, 2026

Upload by Marglet