1
Addendum to
AWWA Manual M6, Water Meters—Selection, Installation, Testing,
and Maintenance, Fifth Edition(November 2018)
Purpose
The 2018 Addendum to AWWA Manual M6, Water Meters—Selection, Installation, Testing, and Maintenance, fifth edition, provides guidance to users on testing procedures and related topics for meters conforming to standard ANSI/AWWA C715-18 Cold-Water Meters—Electromagnetic and Ultrasonic Type, for Revenue Applications. This standard was approved by the AWWA Standards Committee on Water Meters on February 19, 2018, approved by the AWWA Board of Directors on June 9, 2018, and made effective on October 1, 2018.
The 2018 Addendum is considered a part of AWWA Manual M6 wherever the manual is referenced by AWWA water meter standards or other documents.
The current edition of AWWA Manual M6, the fifth edition, was published in 2012. The AWWA Water Meter Standards Committee believes that the 2018 Addendum to the manual fills an immediate need by water utilities for up-to-date meter testing procedures and that it was important for this information to be published in the interim, as work is continuing on the sixth edition of the manual.
Background
Historically, AWWA Manual M6 has served as a guide to best practices for water meters, as a companion document to the AWWA water meter standards. From a practical standpoint, the manual is often used as a reference tool by utilities in their meter shops for determining and executing the proper testing procedures for the various meter types and sizes.
As the family of AWWA water meter standards has expanded over the years to include new meter types, AWWA Manual M6 has also grown to include information on these new meters. The common practice has been that Manual M6 includes information on the meter types for which an AWWA standard exists. The fifth edition of the manual, for example, was expanded in 2012 to include information on singlejet-type (ANSI/AWWA C712) and fluidic oscillator-type (ANSI/AWWA C713) meters. The sixth edition will include more information on electromagnetic- and ultrasonic-type (ANSI/AWWA C715) meters, as well as meters for residential fire sprinkler systems in one- and two-family dwellings and manufactured homes (ANSI/AWWA C714).
Copyright © 2018 American Water Works Association. All Rights Reserved.
2
Testing Procedures
Table 5-3 includes recommended data for testing cold-water meters by the volumetric method, using volumetric tanks, or by the gravimetric method, using weight scales. This data may also be used for testing cold-water meters against a master or reference meter that has a known calibration curve. Accuracy standards for new meters are contained in the latest editions of standards ANSI/AWWA C700, C701, C702, C703, C704, C708, C710, C712, C713, C714, and C715. The modified Table 5-3 issued in this addendum reflects the latest accuracy standards from these AWWA standards.
The following listing provides additional guidance on meter testing, beyond the modifications made in Table 5-3.
1. In testing meters to validate their accuracy (either prior to deployment or after some time in service), note that the testing procedures for electronic meters, may be different from those meters previously placed in service. The manufacturer’s recommended testing procedures should be followed. Ignoring these recommendations can invalidate the accuracy results.
2. Electronic meters do not have moving parts and, therefore, are not subject to the same wear and tear as mechanical meters. Although AWWA standards for mechanical water meters provide recommended testing frequencies in the appendix of each standard, recommended testing frequencies are not provided in the appendix of ANSI/AWWA C715. Water quality and other local conditions may affect the performance of electronic meters over time. To assess these site-specific effects, the utility may choose to verify the accuracy of electronic meters at the recommended test frequencies provided in AWWA standards for mechanical meters, until the utility establishes its own criteria based on data collected on its operational experience and local conditions.
3. Some of the smaller electronic meters have minimum rate accuracy requirements at lower flow rates than any of the rates given in other AWWA meter standards (i.e., flow rates lower than 0.25 gpm). In other instances, the minimum rate flow rates of electronic meters may be lower than those of the mechanical meters previously deployed by the utility, for any given line size. Accuracy at these lower flow rates, therefore, might be more difficult to test and verify on the existing utility’s meter test bench equipment. Gravimetric systems might provide more sensitivity than volumetric systems. In all cases, the testing equipment must be maintained properly, calibrated periodically, and certified to ensure it is working properly.
4. As discussed in item #3, a utility’s testing equipment may not be capable of testing electronic meters reliably at the lower flow rates (particularly for flow rates even lower than the minimums given in ANSI/AWWA C715, if part of the manufacturer’s warrantied accuracy claims). If this is the case, an independent third-party service company with certified and calibrated equipment along with sound testing protocols may need to be engaged to verify accuracy. As provided in one of the footnotes for the modified Table 5-3 in this addendum, a utility may alternatively increase the minimum test rate flow to stay within the capability of their equipment, while holding the electronic meters to their tighter accuracy requirement at these somewhat higher flow rates. Utilities may also wish to use these somewhat higher flow rates when there are test time constraints.
5. Historically, Table 5-3 has included some caveats in test quantity recommendations, relative to the footnote that has called for “not less than 3 min running.” This has been most notable for some of the maximum rate test quantities, which would result in test run times well below three minutes in length. This ambiguity recognizes limitations in the number and size of test tanks with which the utility may be equipped. The footnote further provides that, for reduced test quantities, “the resultant increase in total test
Copyright © 2018 American Water Works Association. All Rights Reserved.
3
uncertainties and errors need to be recognized.” While mechanical water meters may have been able to accommodate those test quantities in Table 5-3 that result in test times of less than three minutes, this may not be the case for some electronic meters. A special test mode—temporarily increasing the sampling rate for the meter—may be available for some electronic meter designs, to mitigate the test uncertainties associated with test times shorter than three minutes.
6. Table 5-3 provides recommended test flow rates. These recommendations are based, in part, on the observation that all meters of the same type (all positive displacement meters, all turbine meters, and so on) will exhibit the same or similar characteristic accuracy curves. This may not be a valid observation for electronic meters, for which distinct calibration algorithms may be in use. As a result, alternate or additional flow test rates may be considered. These would be especially relevant for flow rates given in the manufacturer’s performance claims that significantly exceed the ranges established in AWWA water meter standards.
7. Electromagnetic- and ultrasonic-type electronic meters are inferential in nature, measuring water velocities and inferring volumetric flows based on these velocities. (Many mechanical flow meters are also inferential in nature.) Inferential meters can be susceptible to flow profile disturbances, and to “noisy” flow delivery systems (e.g., pressure pulsations). Care should be taken to ensure that utility test stands do not introduce disturbances or noise at levels that are not representative of those that occur in actual field installations.
For the sixth edition of this manual, expanded information on several aspects of meter testing will be provided; these will include test uncertainties related to testing equipment, test uncertainties related to procedures and practices, and evaluation of accuracy results for meters pulled from service in the field. If users of this manual have any comments, questions, or suggestions regarding this manual, they can contact the AWWA Standards group at [email protected].
Copyright © 2018 American Water Works Association. All Rights Reserved.
4
For t
his 2
018
Man
ual M
6 ad
dend
um, T
able
5-3
of M
anua
l M6,
fifth
edi
tion
(201
2) is
repl
aced
with
the
follo
win
g Ta
ble
5-3:
Tabl
e 5–
3 T
est r
equi
rem
ents
for n
ew, r
ebui
lt, a
nd re
paire
d co
ld-w
ater
met
ers*
Dis
plac
emen
t Met
ers
(AN
SI/A
WW
A C
700
and
C71
0)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
1/2
810
010
98.5
–101
.52
101
98.5
–101
.51/
410
195
–101
90
1/2
x 3/
48
100
1098
.5–1
01.5
210
198
.5–1
01.5
1/4
101
95–1
0190
5/8
1510
010
98.5
–101
.52
101
98.5
–101
.51/
410
195
–101
90
5/8
x 3/
415
100
1098
.5–1
01.5
210
198
.5–1
01.5
1/4
101
95–1
0190
3/4
2510
010
98.5
–101
.53
101
98.5
–101
.51/
210
195
–101
90
140
100
1098
.5–1
01.5
410
198
.5–1
01.5
3/4
101
95–1
0190
1½50
100
1098
.5–1
01.5
810
010
98.5
–101
.51½
100
1095
–101
90
210
010
010
98.5
–101
.515
100
1098
.5–1
01.5
210
010
95–1
0190
Mul
tijet
Met
ers
(AN
SI/A
WW
A C
708)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
5/8
1510
010
98.5
–101
.51
101
98.5
–101
.51/
410
197
–103
90
5/8
x 3/
415
100
1098
.5–1
01.5
110
198
.5–1
01.5
1/4
101
97–1
0390
3/4
2510
010
98.5
–101
.52
101
98.5
–101
.51/
210
197
–103
90
135
100
1098
.5–1
01.5
310
198
.5–1
01.5
3/4
101
97–1
0390
1½70
100
1098
.5–1
01.5
510
010
98.5
–101
.51½
100
1097
–103
90
210
010
010
98.5
–101
.58
100
1098
.5–1
01.5
210
010
97–1
0390
Copyright © 2018 American Water Works Association. All Rights Reserved.
Con
tinue
d
5
Sing
leje
t Met
ers
(AN
SI/A
WW
A C
712)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
5/8
1510
010
98.5
–101
.52
101
98.5
–101
.51/
410
195
–101
.590
5/8
x 3/
415
100
1098
.5–1
01.5
210
198
.5–1
01.5
1/4
101
95–1
01.5
90
3/4
2510
010
98.5
–101
.53
101
98.5
–101
.51/
210
195
–101
.590
140
100
1098
.5–1
01.5
410
198
.5–1
01.5
3/4
101
95–1
01.5
90
1½50
100
1098
.5–1
01.5
810
010
98.5
–101
.51/
210
010
95–1
01.5
90
210
010
010
98.5
–101
.515
100
1098
.5–1
01.5
1/2
100
1095
–101
.590
316
050
050
98.5
–101
.520
100
1098
.5–1
01.5
1/2
100
1095
–101
.590
425
050
050
98.5
–101
.540
100
1098
.5–1
01.5
3/4
100
1095
–101
.590
650
01,
000
100
98.5
–101
.560
100
1098
.5–1
01.5
1½10
010
95–1
01.5
90
Flui
dic-
Osc
illat
or M
eter
s (A
NSI
/AW
WA
C71
3)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate
Test
Q
uant
ity††
Acc
urac
y Li
mits
Acc
urac
y Li
mits
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
1/2
810
010
98.5
–101
.52
101
98.5
–101
.51/
410
195
–101
.590
1/2
x 3/
48
100
1098
.5–1
01.5
210
198
.5–1
01.5
1/4
101
95–1
01.5
90
5/8
1510
010
98.5
–101
.52
101
98.5
–101
.51/
410
195
–101
.590
5/8
x 3/
415
100
1098
.5–1
01.5
210
198
.5–1
01.5
1/4
101
95–1
01.5
90
3/4
2510
010
98.5
–101
.53
101
98.5
–101
.51/
210
195
–101
.590
140
100
1098
.5–1
01.5
410
198
.5–1
01.5
3/4
101
95–1
01.5
90
1½50
100
1098
.5–1
01.5
810
010
98.5
–101
.51½
100
1095
–101
.590
210
0 10
010
98.5
–101
.515
100
1098
.5–1
01.5
210
010
95–1
01.5
90
Copyright © 2018 American Water Works Association. All Rights Reserved.
Con
tinue
d
6
Cla
ss I
Turb
ine
Met
ers,
Ve
rtic
al-S
haft
Type
(AN
SI/A
WW
A C
701)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
3/4
3010
010
98–1
023
101
98–1
021½
101
98–1
02—
150
100
1098
–102
510
198
–102
210
198
–102
—
1½10
050
050
98–1
0210
100
1098
–102
310
010
98–1
02—
216
050
050
98–1
0216
100
1098
–102
410
010
98–1
02—
335
01,
000
100
98–1
0235
100
1098
–102
610
010
98–1
02—
460
01,
500
200
98–1
0260
100
1098
–102
810
010
98–1
02—
61,
250
4,00
050
098
–102
125
1,00
010
098
–102
151,
000
100
98–1
02—
Cla
ss II
Tur
bine
Met
ers,
In
-Lin
e (H
igh-
Velo
city
) Typ
e (A
NSI
/AW
WA
C70
1)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
1½10
050
050
98.5
–101
.54
100
1098
.5–1
01.5
—
216
050
050
98.5
–101
.54
100
1098
.5–1
01.5
—
335
01,
000
100
98.5
–101
.58
100
1098
.5–1
01.5
—
463
01,
500
200
98.5
–101
.515
100
1098
.5–1
01.5
—
61,
400
4,00
050
098
.5–1
01.5
301,
000
100
98.5
–101
.5—
82,
400
7,00
090
098
.5–1
01.5
501,
000
100
98.5
–101
.5—
103,
800
10,0
001,
300
98.5
–101
.575
1,00
010
098
.5–1
01.5
—
125,
000
15,0
002,
000
98.5
–101
.512
01,
000
100
98.5
–101
.5—
167,
000
30,0
004,
000
98.5
–101
.520
01,
000
100
98.5
–101
.5—
2010
,000
40,0
005,
000
98.5
–101
.530
01,
000
100
98.5
–101
.5—
Copyright © 2018 American Water Works Association. All Rights Reserved.
Con
tinue
d
7
Prop
elle
r Met
ers
(AN
SI/A
WW
A C
704)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
210
030
040
98–1
0245
200
2598
–102
90
325
080
010
098
–102
8020
025
98–1
0290
450
01,
500
200
98–1
0285
250
3098
–102
90
61,
200
2,50
030
098
–102
160
500
6098
–102
90
81,
500
3,00
040
098
–102
190
500
6098
–102
90
102,
000
4,00
050
098
–102
260
500
6098
–102
90
122,
800
6,00
080
098
–102
275
750
100
98–1
0290
143,
750
8,00
01,
000
98–1
0235
01,
000
130
98–1
0290
164,
750
10,0
001,
300
98–1
0245
01,
500
200
98–1
0290
185,
625
12,0
001,
600
98–1
0255
02,
000
250
98–1
0290
206,
875
15,0
002,
000
98–1
0265
02,
500
300
98–1
0290
2410
,000
20,0
002,
500
98–1
021,
000
4,00
050
098
–102
90
3015
,000
30,0
004,
000
98–1
021,
600
6,00
080
098
–102
90
3620
,000
40,0
005,
000
98–1
022,
400
7,50
01,
000
98–1
0290
4228
,000
40,0
005,
000
98–1
022,
800
10,0
001,
300
98–1
0290
4835
,000
50,0
006,
000
98–1
023,
500
12,5
001,
500
98–1
0290
5445
,000
60,0
008,
000
98–1
025,
000
16,0
002,
000
98–1
0290
6060
,000
70,0
009,
000
98–1
026,
000
20,0
002,
500
98–1
0290
6675
,000
80,0
0011
,000
98–1
027,
500
25,0
003,
000
98–1
0290
7290
,000
90,0
0012
,000
98–1
029,
000
28,0
003,
500
98–1
0290
Copyright © 2018 American Water Works Association. All Rights Reserved.
Con
tinue
d
8
Com
poun
d M
eter
s (A
NSI
/AW
WA
C70
2)§
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)C
hang
e O
ver P
oint
(A
ll M
eter
s)M
inim
um R
ate
(New
and
Reb
uilt)
Min
imum
(R
epai
red)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
Cla
ss I
Cla
ss II
216
040
050
97–1
0398
.5–1
01.5
90–1
0395
–101
90
332
01,
000
100
97–1
0398
.5–1
01.5
90–1
0395
–101
90
450
01,
500
200
97–1
0398
.5–1
01.5
90–1
0395
–101
90
61,
000
3,00
040
097
–103
98.5
–101
.590
–103
95–1
0190
81,
600
4,00
050
097
–103
98.5
–101
.590
–103
95–1
0190
102,
300
4,00
050
097
–103
98.5
–101
.590
–103
95–1
0190
Fire
-Ser
vice
Typ
e, T
ype
I and
Typ
e II
(AN
SI/A
WW
A C
703)
(Tes
t at i
nter
med
iate
rate
not
nec
essa
ry.)§
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)C
hang
e O
ver P
oint
(A
ll M
eter
s)M
inim
um R
ate
(New
and
Reb
uilt)
Min
imum
(R
epai
red)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st Q
uan-
tity†
†A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
Type
ITy
pe II
Not
less
th
an 8
5%N
ot le
ss
than
95%
335
070
010
097
–103
98.5
–101
.590
470
01,
500
200
97–1
0398
.5–1
01.5
90
61,
600
3,00
040
097
–103
98.5
–101
.590
82,
800
5,00
070
097
–103
98.5
–101
.590
104,
400
9,00
01,
200
97–1
0398
.5–1
01.5
90
Copyright © 2018 American Water Works Association. All Rights Reserved.
Con
tinue
d
9
Fire
Ser
vice
Typ
e, T
ype
III (A
NSI
/AW
WA
C70
3)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
335
070
010
098
.5–1
01.5
1010
010
98.5
–101
.54
100
1095
–101
.5—
470
01,
500
200
98.5
–101
.530
500
5098
.5–1
01.5
1010
010
95–1
01.5
—
61,
600
3,00
040
098
.5–1
01.5
6010
0010
098
.5–1
01.5
2010
0010
095
–101
.5—
82,
800
5,00
070
098
.5–1
01.5
7010
0010
098
.5–1
01.5
3010
0010
095
–101
.5—
104,
400
9,00
01,
200
98.5
–101
.511
010
0010
098
.5–1
01.5
3510
0010
095
–101
.5—
Copyright © 2018 American Water Works Association. All Rights Reserved.
Con
tinue
d
10
Elec
trom
agne
tic a
nd U
ltras
onic
Met
ers
for R
even
ue A
pplic
atio
ns,
Type
I (A
NSI
/AW
WA
C71
5)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
e§§
Test
Q
uant
ity††
Acc
urac
y Li
mits
§§A
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
1/2
810
010
98.5
–101
.50.
3510
198
.5–1
01.5
0.11
(0
.18)
101
95–1
05(9
8.5–
101.
5)—
5/8
1510
010
98.5
–101
.50.
410
198
.5–1
01.5
0.13
(0
.20)
101
95–1
05(9
8.5–
101.
5)—
3/4
2510
010
98.5
–101
.51
101
98.5
–101
.50.
15
(0.5
)10
195
–105
(98.
5–10
1.5)
—
140
100
1098
.5–1
01.5
1.5
101
98.5
–101
.50.
3 (0
.75)
101
95–1
05(9
8.5–
101.
5)—
1½60
100
1098
.5–1
01.5
410
010
98.5
–101
.50.
6 (2
)10
010
95–1
05(9
8.5–
101.
5)—
210
010
010
98.5
–101
.55
100
1098
.5–1
01.5
1 (2
.5)
100
1095
–105
(98.
5–10
1.5)
—
320
050
050
98.5
–101
.515
100
1098
.5–1
01.5
2.5
(7.5
)10
010
95–1
05(9
8.5–
101.
5)—
440
01,
000
100
98.5
–101
.520
500
5098
.5–1
01.5
3.5
(10)
300
4095
–105
(98.
5–10
1.5)
—
680
02,
000
200
98.5
–101
.540
1,00
010
098
.5–1
01.5
9 (20)
300
4095
–105
(98.
5–10
1.5)
—
81,
000
5,00
050
098
.5–1
01.5
803,
000
400
98.5
–101
.518
(4
0)2,
000
300
95–1
05(9
8.5–
101.
5)—
Con
tinue
d
Copyright © 2018 American Water Works Association. All Rights Reserved.
11
Elec
trom
agne
tic a
nd U
ltras
onic
Met
ers
for R
even
ue A
pplic
atio
ns,
Type
II (A
NSI
/AW
WA
C71
5)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
eTe
st
Qua
ntity
††A
ccur
acy
Lim
itsA
ccur
acy
Lim
its
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
1/2
810
010
98.5
–101
.52
101
98.5
–101
.50.
2510
195
–105
—
5/8
1510
010
98.5
–101
.52
101
98.5
–101
.50.
2510
195
–105
—
3/4
2510
010
98.5
–101
.54
101
98.5
–101
.50.
510
195
–105
—
140
100
1098
.5–1
01.5
610
198
.5–1
01.5
0.75
101
95–1
05—
1½10
010
010
98.5
–101
.58
100
1098
.5–1
01.5
1.5
100
1095
–105
—
215
010
010
98.5
–101
.512
100
1098
.5–1
01.5
210
010
95–1
05—
335
050
050
98.5
–101
.530
100
1098
.5–1
01.5
410
010
95–1
05—
460
01,
000
100
98.5
–101
.550
500
5098
.5–1
01.5
7.5
300
4095
–105
—
680
02,
000
200
98.5
–101
.511
01,
000
100
98.5
–101
.515
300
4095
–105
—
82,
000
5,00
050
098
.5–1
01.5
200
3,00
040
098
.5–1
01.5
302,
000
300
95–1
05—
103,
000
7,00
090
098
.5–1
01.5
300
5,00
050
098
.5–1
01.5
503,
000
400
95–1
05—
124,
000
10,0
001,
000
98.5
–101
.540
05,
000
500
98.5
–101
.565
3,00
040
095
–105
—
165,
500
50,0
007,
000
98.5
–101
.575
030
,000
4,00
098
.5–1
01.5
110
20,0
003,
000
95–1
05—
208,
000
50,0
007,
000
98.5
–101
.51,
100
30,0
004,
000
98.5
–101
.517
520
,000
3,00
095
–105
—
Met
ers
for R
esid
entia
l Fire
Spr
inkl
er S
yste
ms
in O
ne- a
nd T
wo-
Fam
ily
Dw
ellin
gs a
nd M
anuf
actu
red
Hom
es (A
NSI
/AW
WA
C71
4)
Siz
e
Max
imum
Rat
e (A
ll M
eter
s)In
term
edia
te R
ate
(All
Met
ers)
Min
imum
Rat
e (N
ew a
nd R
ebui
lt)M
inim
um
(Rep
aire
d)
Flow
R
ate†
Test
Q
uant
ity††
Acc
urac
y Li
mits
Flow
R
ate*
*Te
st
Qua
ntity
††A
ccur
acy
Lim
itsFl
ow
Rat
e§§
Test
Q
uant
ity††
Acc
urac
y Li
mits
Acc
urac
y Li
mits
in.
gpm
gal
ft3pe
rcen
tgp
mga
lft3
perc
ent
gpm
gal
ft3pe
rcen
tpe
rcen
t (m
in)
3/4
2510
010
98–1
023
101
98–1
021/
210
195
–103
90
140
100
1098
–102
410
198
–102
3/4
101
95–1
0390
1½50
100
1098
–102
810
010
98–1
021½
100
1095
–103
90
210
010
010
98–1
0215
100
1098
–102
210
010
95–1
0390
Con
tinue
d
Copyright © 2018 American Water Works Association. All Rights Reserved.
12
* A re
built
met
er is
one
that
has
had
the
mea
surin
g el
emen
t rep
lace
d w
ith a
fact
ory-
mad
e ne
w u
nit.
A re
paire
d m
eter
is o
ne th
at h
as h
ad th
e ol
d m
easu
ring
elem
ent c
lean
ed a
nd re
furb
ishe
d in
a u
tility
repa
ir sh
op.
† Th
ese
are
sugg
este
d te
st fl
ows
and
test
qua
ntiti
es. T
estin
g fo
r hig
h ra
tes
of fl
ow c
an b
e ac
hiev
ed b
y te
stin
g th
e m
eter
at 2
5% o
f the
met
ers
ratin
g if
the
man
ufac
ture
r’s o
rigin
al te
st c
ertifi
cate
indi
cate
s a
linea
r cur
ve b
etw
een
25%
and
100
% o
f the
rate
d flo
w ra
nge.
†† Q
uant
ity s
houl
d be
one
or m
ore
full
revo
lutio
ns o
f the
test
han
d / i
nitia
l dia
l (se
e “M
axim
um In
dica
tion
on In
itial
Dia
l” va
lues
spe
cifie
d in
m
echa
nica
l met
er s
tand
ards
suc
h as
AN
SI/A
WW
A C
700,
C70
1, a
nd s
o on
), or
a q
uant
ity n
ot le
ss th
an th
e “M
axim
um A
llow
able
Indi
catio
n on
In
itial
Dis
play
” val
ues
spec
ified
in A
NS
I/AW
WA
C71
5. Q
uant
ity s
houl
d re
sult
in n
ot le
ss th
an 3
min
utes
runn
ing.
Whe
n lim
ited
test
cap
abili
ties
forc
e th
e us
e of
sm
alle
r tes
t qua
ntiti
es, t
he re
sulta
nt in
crea
se in
tota
l tes
t unc
erta
intie
s an
d er
rors
nee
d to
be
reco
gniz
ed w
hen
esta
blis
hing
ac
cept
ance
crit
eria
tole
ranc
e.
§ Th
e by
pass
met
er s
houl
d be
test
ed in
acc
orda
nce
with
the
appr
opria
te te
st re
quire
men
ts fo
r the
type
of m
eter
use
d.
** A
s th
is ra
te v
arie
s ac
cord
ing
to m
anuf
actu
rer,
it sh
ould
be
dete
rmin
ed fo
r eac
h ty
pe o
f met
er te
sted
.
§§ M
inim
um te
st fl
ow ra
tes
with
cor
resp
ondi
ng a
ccur
acy
limits
in p
aren
thes
es (
) are
alte
rnat
ive
valu
es, t
o ac
com
mod
ate
conc
erns
ove
r tes
t tim
es o
r con
cern
s ov
er te
st b
ench
es b
eing
abl
e to
con
duct
test
ing
at th
e sm
alle
r flow
rate
s (w
ithou
t par
enth
eses
) rel
iabl
y. N
ote
that
the
flow
ra
te v
alue
s in
par
enth
eses
are
the
low
est r
ates
for t
he n
orm
al te
st li
mits
from
AN
SI/A
WW
A C
715,
and
as
such
wou
ld h
ave
accu
racy
lim
its o
f 98
.5%
−101
.5%
. If t
hese
flow
rate
s in
par
enth
eses
are
use
d in
Min
imum
Rat
e te
stin
g, th
en th
e re
com
men
ded
test
flow
rate
s fo
r the
Inte
rmed
i-at
e R
ate
shou
ld b
e tw
ice
thos
e lis
ted
in th
e ta
ble.
How
ever
, see
the
prec
edin
g fo
otno
te, d
etai
ling
the
pref
erre
d us
e of
an
inte
rmed
iate
rate
de
term
ined
for e
ach
spec
ific
mak
e/m
odel
.
Met
ric C
onve
rsio
ns: i
n. ×
25.
4 =
mm
, gal
× 0
.003
785
= m
3 , g
pm ×
0.2
268
= m
3 /h,
ft3
× 0.
0283
1 =
m3 .
Copyright © 2018 American Water Works Association. All Rights Reserved.