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CITY OF_�16ARD
To: Whom it May Concern BUILDING DIVISION
From: Evan Benedict
Re: River Terrace Unit E-6 and K-6 Underground Supply
Date: 9/9/16
With the underground from the meter to the PRV lengths being different,the following was used to
determine whether or not the pipe needed to be upsized.
For the K-6 units, lots (11, 12, 13, 16, 17,and 18)the longest underground length of 120'was used,
and it left more than a 5psi safety margin for the K-6 units. Thus the underground pipe size can
remain at 1%"for all K-6 units.
For the E-6 units, lots (10, 14, 15 and 19)the actual underground lengths were used, and lots 10
(45') and lot 19 (60') have a safety margin greater than 4psi. Thus these two lots can remain at 1%"
pipe size from the meter to the PRV.
For lot 14 the underground length of 125'was used, and the pipe size from the meter to the PRV will
need to be upsized to at least 1 %:"to be left with a safety margin of 4.9psi.
For lot 15 the underground length of 160' was used, and the pipe size from the meter to the PRV will
need to be upsized to at least 1%Z"to be left with a safety margin of 2.8psi.
Sincerely,
Evan Benedict
Design Technician—Fire Safety
Uponor North America Uponor,Inc. Uponor Ltd.
5925 148th Street West 2000 Argentia Rd., Plaza 1, Ste. 200
Apple Valley, MN 55124 Mississauga, ON L5N 1W1
T 800.321.4739 T 888.994.7726
F 952.891.2008 F 800.638.9517
W www.uponor-usa.com W www.uponor.ca