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<br /> <br />448684.1 <br />P.O. Box 520, Pleasanton, CA 94566-0802 123 Main Street <br />City Manager City Attorney Economic Development City Clerk <br />(925) 931-5002 (925) 931-5015 (925) 931-5038 (925) 931-5027 <br />Fax: 931-5482 Fax: 931-5482 Fax: 931-5485 Fax: 931-5492 <br /> <br /> <br /> <br />June 29, 2026 <br /> <br />Valerie Pryor <br />General Manager <br />Zone 7 Water Agency <br /> <br />RE: Equivalent Maximum Continuous Flow Data for Kamstrup Flow IQ2200 <br />Dear Ms. Pryor, <br /> <br />Attached is a letter from Kamstrup, the manufacturer of the FLOWIQ® 2200 ultrasonic water <br />meter, providing the continuous flow performance information for the 5/8-inch, 3/4-inch, and 1- <br />inch meter models proposed by the City. <br /> <br />As discussed in the City's April 27, 2026 letter, ultrasonic water meters are manufactured and <br />tested in accordance with AWWA C715, which does not define a "maximum continuous flow" <br />parameter comparable to that used for displacement meters. Kamstrup has advised the City that, <br />for the FLOWIQ® 2200 meter, the flow rate designated as Q3 under ISO 4064 represents the <br />equivalent maximum continuous flow for design and evaluation purposes. <br /> <br />Based on the technical information provided by Kamstrup, the City believes that the proposed <br />Model 8B (5/8-inch), Model 8C (3/4-inch), and Model 8D (1-inch) FLOWIQ® 2200 meters <br />satisfy Zone 7’s connection fee requirements reflected in Zone 7's June 16, 2026 Connection Fee <br />Schedule. For ease of reference, a comparison of the applicable continuous flow ratings for <br />traditional displacement meters and the proposed Kamstrup ultrasonic meters is provided in the <br />table below. <br />Meter <br />Size <br />Displacement Meter <br />Maximum <br />Continuous Flow <br />(US gpm) <br />Kamstrup Flow IQ2200 <br />Equivalent Maximum <br />Continuous Flow <br />(US gpm) <br />Evaluation <br />5/8” 10 7.04 Q3 (7.04 gpm) is equivalent to <br />maximum continuous flow per <br />ISO 4064 §4.1 and the meter <br />manufacturer; satisfies Zone 7 <br />requirement <br />¾” 15 11.0 Q3 (11.0 gpm) is equivalent to <br />maximum continuous flow per <br />ISO 4064 §4.1 and the meter <br />manufacturer; satisfies Zone 7 <br />requirement