11026 20TH DR SE 2016-11-18 - Laserfiche WebLink

�� ': � : .� . t ),C•i q ` �: 3� .e .. � uponor Oct. 29, 2012 To Whom It May Concern: Continuous lengths of Uponor AquaPEX° and Wirsbo hePEXT"" crosslinked polyethylene (PEX-a) tubing offer the greatest system integrity, and their use is the normal practice for in-slab or under-siab instaliations. However, in certain situations, Uponor recognizes splices or joints in Uponor AquaPEX and Wirsbo hePEX rnay be necessary for tube installed in or under a concrete slab. In such instances, it is important the installer uses the proper fitting for the application and observes proper installation techniques. Below is a list of fittings most commonly used with Uponor AquaPEX and Wirsbo hePEX tubing, along with a brief overview of their appropriate usage and limitations. • ProPEX° engineered polymer (EP) fittings (tees, elbows, couplings or plugs) are the most versatile fittings and can be buried directly in the soil, in or under a concrete slab in both exterior and interior applications, or in concealed or accessible spaces. • ProPEX lead-free (LF) brass fittings (tees, elbows, couplings or adapters) may be buried directly in the soil, under a slab in both exterior and interior applications, or in concealed or accessible spaces. Note that fittings buried directly in concrete must be completely wrapped with a piece of flexible insulation or similar isolating material. • ProPEX yellow brass fittings (tees, elbows, couplings or adapters) for installations in non-potable water applications may be used in concealed or accessible locations, but must be completely wrapped with a piece of flexible insulation or simiiar isolating material if buried in or under a slab in both exterior and interior applications. Additiona{ly, PEX tubing for potable hot- and cold-Niater distribution is approved for installation directly within or below concrete slabs, provided the application of any required pesticide/termiticide treatment is done according to recommendations. The PEX tubing is not required to be sleeved; however, Uponor's installation instructions recommend using either flexible polyethylene (PE) protection sleeves or rigid PVC bend guides at all s�ab penetrations to protect the PEX tubing from abrasion. When using Uponor's pre-sleeved tubing products or a protedion sleeve around the tubing, an annuiar gap between the protection device and the PEX tubing will exist. In such installations, the installer must fill the annutar gap between the protection device and the PEX tubing at the exposed ends to prevent pathways for pests and the mistaken application of harmful chemicals into this space. The following sealants may be used with Uponor PEX tubing provided the sealant manufacturer has approved its use far contact with PEX. • Latex caulk • Latex foam - Silicone sealant • Polyurethane expanding foam Provided the above requirements are followed, the applicable Uponor warranty will remain in effect for the PEX tubing and ProPEX fittings. For 1`urther yuestions, please refer to the Uponor Compfete Design Assistance Manual (CDAM), Che Plumbing Design Assistance Manual (PDAM) or contact Uponor'iechnical Services at 888.594.7726 or technical.services uqonor com. Sincerely, Dale E. Stroud Senior Director, Offerings/Marketing Uponor Nor[h America Uponor, Inc. 5925 148�" Street West Apple Valley, MN 55124 Tel: (800) 321-4739 Fax: (952) 891-2008 Web: www,uponor-usa.com Uponor Ltd. 2000 Argentia Road Plaza 1, Suite 200 Mississauga, pN L5N iWl Tel: (888) 994-7726 Fax: (800) 638-9517 Web: www.uponor.ca �' aF a ,, �a.