Tech
Data
PRODUCT SPECIFICATION SHEET
TD-PFVP 0307
VIEGA
301 N. Main, Floor 9
Wichita, KS 67202
Phone: 1-877-VIEGA-NA
Fax: 1-800-976-9817
service@viega.com
www.viega-na.com
1
ViegaPEX™ Cross-linked Polyethylene (PEX)
Scope
This material specification designates the requirements for ViegaPEX hot and cold water distribution tubing. All
ViegaPEX tubing is copper tube size dimension (CTS), SDR-9 wall thickness and meets the respective requirements
of ASTM F876 and F877.
Materials
All ViegaPEX tubing is manufactured from a cross-linkable high density polyethylene produced by grafting
organo-silanes onto a polyethylene base. A catalyst (accelerator) added to the cross-linkable polyethylene during
extrusion initiates the cross-linking process. Cross-linking is completed with hot water or steam (sauna). ViegaPEX
tubing is available in red, white, or blue for easy identification of hot and cold lines.
Marking and Certification
All ViegaPEX tubing is marked with the name Viega as the manufacturer, nominal size, plastic tubing material
designation code (PEX 1006), design pressure and temperature ratings, relevant ASTM standards,
manufacturing date and production code, as well as both the NSF-pw and the NSF CL-R/CL-TD stamps indicating
third-party certification by NSF International for meeting and exceeding performance and toxicological standards, as
well as achieving the highest chlorine resistance rating (NSF Protocol P171) in the PEX industry. NSF conducts
random on-site inspections of Viega manufacturing facilities and independently tests ViegaPEX tubing for compliance
with physical, performance and toxicological standards. ViegaPEX is also certified to meet the Uniform Plumbing
Code, IAPMO, CSA B137.5 Warnock Hersey, the ICBO Evaluation Service and HUD (Housing and Urban
Development).
Recommended Uses
ViegaPEX tubing is intended and recommended for use in hot and cold potable water distribution systems. Design
temperature and pressure ratings for ViegaPEX is 160 psi @ 73°F and 100 psi @ 180°F. ViegaPEX tubing can also
be used in "continuously-recirculating" plumbing systems at temperatures of up to 140°F while still maintaining
excellent chlorine resistance. For information on the suitability for other hot and cold water applications not listed here,
consult with your Viega representative.
Handling and Installation
ViegaPEX cross-linked polyethylene tubing is tough yet flexible. However, it is softer than metals and may be
damaged by abrasion or by objects with a cutting edge. Use of these materials in hot and cold water distribution
systems must be in accordance with good plumbing practices, applicable code requirements, and current installation
practices available from Viega. ViegaPEX is manufactured to meet written national standards. Contact a Viega
representative or the applicable code enforcement bureau for information about approvals for specific applications.
Property ASTM Test Method Typical Values
English Units SI Units
Density D 792 – 0.946 g/cc
Melt Index
1
(190°C/2.16 kg) D 1238 – 0.7g/10 min
Flexural Modulus
2
D 790 120,000 psi 830 MPa
Tensile Strength @ Yield (2 in/min) D 638 2,900 psi 20 MPa
Coefficient of Linear Thermal Expansion @ 68°F D 696 8x10
2
/°F 15x10
-5
/°C
Hydrostatic Design Basis @ 73°F (23°C) D 2837 1,250 psi 8.6 MPa
Hydrostatic Design Basis @ 180°F (82°C) D 2837 800 psi 5.5 MPa
Vicat Softening Point D 696 255°F 124°C
Thermal Conductivity D 177 2.4 Btu-in (hr)(ft
2
)(°F/in) 3.5x10
-3
Watts/(cm
2
)(°C/cm)
1. Before Cross-linking
2. 73°F
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