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Applications <br /> Recirculation Systems <br /> Based on our extensive history of use and testing, Uponor provides the <br /> following guidelines for using Wirsbo AQUAPEX tubing and corresponding <br /> fitting systems in recirculating systems. <br /> 1. Uponor highly recommends using the Uponor D'MAND° Hot Water <br /> Delivery system for optimized system performance.The D'MAND system <br /> delivers hot water only when called for by the end user, providing fast <br /> hot water delivery while maximizing water and energy savings. Wirsbo <br /> AQUAPEX is ideally suited for systems operating up to 140°F. <br /> 2. Wirsbo AQUAPEX may be used in timed recirculation systems operating <br /> at temperatures not exceeding 140°F. <br /> 3. Wirsbo AQUAPEX may be used in continuous recirculation systems <br /> operating at temperatures not exceeding 140°F. <br /> Note: Uponor does not promote the use of continuous recirculation <br /> due to excessive energy waste. <br /> 4.The tubing is marked with the following designation as required by the <br /> most recent edition of ASTM F876: PEX 1006.The first digit indicates <br /> chlorine-resistance testing. 1 = Compliance with ASTM F876 chlorine- <br /> resistance testing. 0 = no chlorine resistance or not tested. <br /> 5. Do not exceed the published temperature and pressure ratings of <br /> the tubing. <br /> 6. Using recirculation systems may increase the risk of scalding.Thus, <br /> Uponor recommends limiting the delivered water temperature to 120°F <br /> in all cases. <br /> Uponor Residential Fire Safety Systems <br /> The Uponor Residential Fire Safety System was developed by Uponor as a <br /> residential fire protection system that is installed in combination <br /> with the cold side of the domestic potable water system. Only licensed <br /> contractors trained by Uponor can install this system. Contact your local <br /> Uponor representative for more information concerning training and <br /> project support for the Uponor Residential Fire Safety System. <br /> ® uponor www.uponar-usa.com <br />