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<br />:��� Oct. 29, 2012
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<br />uponor
<br />Continuous lengths oF Uponor AquaPEX° and Wirsbo hePEXT"^ crosslinked polyethylene (PEX-a) tubing offer the
<br />greatest system integrity, and their use is the normal practice for in-slab or under-slab instaliations. However,
<br />in certain situations, Uponor recognizes splices or joints in Uponor AquaPEX and Wirsbo hePEX may be
<br />necessary for tube installed in or under a concrete slab. In such instances, it is important the installer uses the
<br />proper fitting for the application and observes proper instailation techniques. Below is a list of fittings most �¢•.:�
<br />commonly used with Uponor AquaPEX and Wirsbo hePEX tubing, along with a brief overview of their
<br />appropriate usage and limitations.
<br />� ProPEX° engineered polymer (EP) fittings (tees, elbows, couplings or plugs) are the most versatile
<br />fittings and can be buried directly in the soil, in or under a concrete slab in both exterior and interior
<br />applications, or in concealed or accessible spaces.
<br />'"�" • ProPDC lead-free (LF) brass fittings (tees, elbows, couplings or adapters) may be burfed directly in Che
<br />�:, soll, under a slab in both exterior and interior applications, or in concealed or accessible spaces. Note
<br />that fittings buried directiy in concrete must be compietely wrapped with a piece of flexible insulation
<br />�,. or sirnilar isolating material.
<br />• ProPQ( yellow brass fittings (tees, elbows, couplings or adapters) for installations in non-potable water
<br />• applications may be used in concealed or accessible locations, but must be completely wrapped with a
<br />piece of flexible insulation or similar isolating material if buried in or under a slab in both exterior and
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<br />interior applications.
<br />� "Additionally, PIX tubing for potable hot- and cold-water distribution is approved for installation directly within
<br />` � or below concrete slabs, provided the application of any required pesticide/termiticide treatment is done
<br />'*"" according to recommendations. The PEX tubing is not required to be sleeved; however, Uponor's installation
<br />instructions recommend using either flexible polyethylene (PE) protection sleeves or rigid PVC bend guides at
<br />all slab penetrations to protect the PEX tubing from abrasion.
<br />When using Uponor's pre-sleeved tubing products or a protection sleeve around the tubing, an annular gap
<br />between the protectian device and the PEX tubing will exist. In such installations, the installer must fill the
<br />annular gap between the protection device and the PEX tubing at the exposed ends to prevent pathways for
<br />pests and the mistaken application of harmful chemicals into this space. The following sealants may be used
<br />with Uponor PEX tubing provided the seafant manufacturer has approved its use for contact with PEX.
<br />• Latex caulk
<br />• Latex foam
<br />• Sificone sealant
<br />• Polyurethane expanding foam
<br />Provided the above requirements are followed, the applicable Uponor warranty will remain in effect for the
<br />PEX tubing and ProPEX fittings. For further questions, please refer to the Uponor Complete Design Assistance
<br />Manual (CDAM), the Plumbing Design Assistance Manual (PDAM) or contact Uponor Technical Services at
<br />888.594.7�26 or technical services uoonor com.
<br />S►ncerely,
<br />Dale E. Stroud
<br />Senior Director, Offerings/Marketing
<br />Uponor North America
<br />Upo�or, Inc.
<br />5925 148`" Street West
<br />Apple Valley, MN 55124
<br />Tef: (800) 321-4739
<br />Fax: (952) 891-2008
<br />Web: www.uponor-usa.com
<br />Uponor l.td.
<br />2000 Argentia Road
<br />Plaza 2, Suite 200
<br />Mississauga, ON L5N 1W1
<br />Tel: (888) 994-7726
<br />Fax:(800) 638-9517
<br />Web: www.uponor.ca
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