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