448684.1
P.O. Box 520, Pleasanton, CA 94566-0802 123 Main Street City Manager City Attorney Economic Development City Clerk (925) 931-5002 (925) 931-5015 (925) 931-5038 (925) 931-5027 Fax: 931-5482 Fax: 931-5482 Fax: 931-5485 Fax: 931-5492
June 29, 2026
Valerie Pryor
General Manager
Zone 7 Water Agency
RE: Equivalent Maximum Continuous Flow Data for Kamstrup Flow IQ2200 Dear Ms. Pryor,
Attached is a letter from Kamstrup, the manufacturer of the FLOWIQ® 2200 ultrasonic water meter, providing the continuous flow performance information for the 5/8-inch, 3/4-inch, and 1- inch meter models proposed by the City.
As discussed in the City's April 27, 2026 letter, ultrasonic water meters are manufactured and tested in accordance with AWWA C715, which does not define a "maximum continuous flow" parameter comparable to that used for displacement meters. Kamstrup has advised the City that, for the FLOWIQ® 2200 meter, the flow rate designated as Q3 under ISO 4064 represents the equivalent maximum continuous flow for design and evaluation purposes.
Based on the technical information provided by Kamstrup, the City believes that the proposed Model 8B (5/8-inch), Model 8C (3/4-inch), and Model 8D (1-inch) FLOWIQ® 2200 meters satisfy Zone 7’s connection fee requirements reflected in Zone 7's June 16, 2026 Connection Fee Schedule. For ease of reference, a comparison of the applicable continuous flow ratings for traditional displacement meters and the proposed Kamstrup ultrasonic meters is provided in the table below.
Meter
Size
Displacement Meter
Maximum
Continuous Flow
(US gpm)
Kamstrup Flow IQ2200
Equivalent Maximum
Continuous Flow
(US gpm)
Evaluation
5/8” 10 7.04 Q3 (7.04 gpm) is equivalent to
maximum continuous flow per
ISO 4064 §4.1 and the meter
manufacturer; satisfies Zone 7
requirement
¾” 15 11.0 Q3 (11.0 gpm) is equivalent to
maximum continuous flow per
ISO 4064 §4.1 and the meter
manufacturer; satisfies Zone 7
requirement
448684.1
1” 25 17.6 Q3 (17.6 gpm) is equivalent to
maximum continuous flow per
ISO 4064 §4.1 and the meter
manufacturer; satisfies Zone 7
requirement
The City therefore concludes that the proposed FLOWIQ® 2200 meters satisfy the applicable flow capacity requirements in Zone 7’s Connection Fee Schedule and meet the hydraulic equivalency requirement of the Settlement Agreement dated July 17, 2025.
Siew-Chin Yeong, P.E.
Director of Public Works
Encl: 2026.06.26 Kamstrup Letter_Max Continuous Flow Confirmation
Cc: Joe Calabrigo, Interim City Manager
Alexa Jeffress, Assistant City Manager
Chris Hentz, Assistant General Manager
Kamstrup Water Metering, LLC • 2855 Forsyth Commerce Way, Building 200, Cumming, GA 30040 • P: (404) 835-6716 We Make What You Measure Matter
June 26, 2026
Siew-Chin Yeong, P.E.
Director of Public Works
City of Pleasanton
3333 Busch Road
Pleasanton, CA 94566
Ref: Kamstrup Meter Spec
Dear Siew-Chin,
It is my understanding the City is looking for manufacturer data for all the meter sizes it is installing in the contract particularly Model 8B (5/8”), Model 8C ( ¾”), and Model 8D (1”) in order to verify Q3 (permanent flow rate) and Q4 (overload flow). I have attached herein the data sheet for these models.
Per ISO Standard 4064 Section 4.1:
Permanent flow rate Q3 is the highest flow rate within the rated operating conditions at which the water meter is required to operate in a satisfactory manner within the maximum permissible error.
Therefore, Q3 shall be considered equivalent to maximum continuous flow for design and evaluation purposes. These flow rates are also in conformance with the AWWA C715 standards and maintain a warranty for accuracy across all ranges of flow measurement.
We are committed to providing the City of Pleasanton with high quality customer service. If you have any questions or concerns, please do not hesitate to contact me using the information below.
Sincerely,
Jess S Bromley
VP Sales, Americas
Kamstrup Water Metering
Email: [email protected]
Phone: (216) 308-3517