Technical Documentation

Access our library of submittals, specifications and other technical information

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 General

What if the tubing leaks?

Answer
Leaks are not a concern with Uponor PEX when the system is properly installed. With a life expectancy of more than 100 years, Uponor PEX tubing has withstood the most extensive tests in the industry for over 30 years. What's more, all our PEX tubing is thoroughly inspected before it leaves our manufacturing plant. We also offer a 25-year limited warranty when installed by an Uponor-trained plumbing professional.

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What temperature and pressure ratings does Uponor PEX carry?

Answer
Uponor PEX carries the following hydrostatic temperature and pressure ratings:

  • 200°F at 80 psi
  • 180°F at 100 psi
  • 120°F at 130 psi (1/2" Wirsbo AQUAPEX tubing only)
  • 73.4°F at 160 psi

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What is PEX tubing?

Answer
PEX (crosslinked polyethylene) tubing is a specially designed plastic tubing with distinctive properties that make it ideal for radiant floor heating and plumbing systems. Uponor produces PEX-a tubing, which is considered the superior type of PEX.

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What's the difference between PEX-a, PEX-b and PEX-c tubing.

Answer
Currently, three methods for producing crosslinked polyethylene (PEX) tubing exist:

  • Engel or peroxide method (PEX-a)
  • Silane method (PEX-b)
  • E-beam (electron beam) or radiation method (PEX-c)

All three processes generate tubing that is crosslinked to varying degrees, and are acceptable for potable water distribution applications according to ASTM F876 and F877 standards.

Uponor manufactures Engel-method PEX-a tubing. The PEX tubing industry considers this tubing superior because the crosslinking is done during the manufacturing process when polyethylene is in it amorphic state (above the crystalline melting point). Because of this, the degree of crosslinking reaches around 85% (higher than the other methods), resulting in a more uniform product with no weak links in the molecular chain. Learn more about why PEX-a Tubing is better.

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What is an Uponor PEX plumbing system?

Answer
Uponor PEX plumbing systems for residential and commercial applications use crosslinked polyethylene (PEX) tubing instead of metal piping to distribute the water. PEX tubing is clean, non-toxic and extremely durable. The flexible nature of this tubing is gaining popularity with plumbers for both new construction and retrofit applications.

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Why should I consider installing an Uponor PEX plumbing system in my home?

Answer
An Uponor PEX plumbing system is a clean, healthy, quiet and reliable alternative to other systems, such as copper. Our innovative system is also corrosion and freeze resistant providing you with peace of mind.

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Why is an Uponor PEX plumbing system a better choice for plumbing than copper?

Answer
First of all, it's a clean and quiet water distribution system. Additionally, Uponor's plumbing system features Wirsbo AQUAPEX® tubing, which is corrosion resistant. Aggressive water and soil, common across the United States, is not kind to copper plumbing and pinhole leaks can occur in copper as a result of these aggressive conditions. Additionally, An Uponor PEX plumbing system is quiet. No more singing pipes and water hammer typically heard with metal plumbing systems.

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How long has Uponor PEX been used in plumbing systems?

Answer
Uponor PEX tubing has been used worldwide in plumbing and radiant heating systems for more than 30 years, longer than any other flexible system on the market.

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Has Uponor PEX tubing undergone extensive testing?

Answer
Yes, Uponor PEX has undergone 35 years of rigorous testing. In 1973, Uponor (then Wirsbo), submitted PEX tubing samples to an independent laboratory. For three decades, these samples underwent continuous hydrostatic tests at extreme temperatures and pressures — up to 203åF and 239 pounds per square inch. When the 30-year life cycle tests were concluded recently, not a single piece of Uponor PEX had experienced any breakdown or failure.

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Is an Uponor PEX plumbing system more expensive than the alternatives?

Answer
An Uponor PEX plumbing system is a very cost-competitive plumbing system when compared with other systems.

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Is the same PEX tubing used for both PEX plumbing and radiant floor heating systems?

Answer
Uponor offers two types of PEX tubing — Wirsbo AQUAPEX® tubing and Wirsbo hePEX™ plus tubing. Wirsbo AQUAPEX® is used in plumbing and under certain circumstances in radiant floor heating systems. Typically, Wirsbo hePEX plus is used for radiant floor heating as it contains an additional layer on the tubing which acts as a barrier and reduces the amount of oxygen entering into the heating system.

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Does Uponor install its PEX plumbing systems?

Answer
Uponor manufactures the durable PEX tubing used in an Uponor PEX plumbing system. We offer comprehensive training and design support for plumbers who want to install Uponor PEX. Find an installer online.

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How can I find an Uponor-trained plumbing professional?

Answer
Call Uponor at (800) 321-4739 or find an installer online.

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What are the Uponor PEX standards?

Answer
Uponor PEX and associated fittings are manufactured to the following standards:

  • ASTM F876 "Standard Specification for Cross-linked Polyethylene (PEX) Tubing"
  • ASTM F877 "Standard Specification for Cross-linked Polyethylene (PEX) Plastic Hot and Cold Water Distribution Systems"
  • ASTM F1960 "Standard Specifications for Cold Expansion Fittings with PEX Reinforcing Rings for use with Cross-linked Polyethylene (PEX) Tubing"
  • ASTM F2080 "Standard Specifications for Cold Expansion Fittings with Metal Compression Sleeves for Cross-linked Polyethylene (PEX) Tubing"

Additional standards for Wirsbo AQUAPEX tubing and associated fittings include:

  • ANSI/NSF Standard 14 "Plastics Piping System Components and Related Materials"
  • ANSI/NSF Standard 61 "Drinking Water System Components — Health Effects"
  • UL 1821 "Standard for Safety for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service" (1/2" Wirsbo AQUAPEX only)

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What if my plumber has never installed this type of system before?

Answer
Simply call (800) 321-4739 and we'll provide your plumber with Uponor training information.

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What listings does Wirsbo AQUAPEX tubing have?

Answer
Wirsbo AQUAPEX tubing has the following listings:

  • IAPMO
  • CSA
  • HUD
  • ICC
  • NSF
  • ITS
  • UL

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What listings does Wirsbo hePEX plus tubing have?

Answer
Wirsbo hePEX plus tubing has the following listings:

  • ICBO
  • NSF-rfh

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What code approvals does Wirsbo AQUAPEX tubing have?

Answer
Wirsbo AQUAPEX tubing is approved in the following codes:

  • IPC
  • UPC
  • NSPC

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What code approvals does Wirsbo hePEX plus tubing have?

Answer

  • IMC
  • UMC

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Where can I find specifications?

Answer
Specifications are found: Specifications

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Where can I find submittals?

Answer
Submittals are found: Submittals

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Is Uponor PEX chlorine-resistant?

Answer
In recent years, ASTM F876 and ASTM F877 have been refined to incorporate benchmarks for chlorine resistance. Under certain conditions, a high concentration of chlorine can contribute to the oxidation of plastics. This, in turn, can affect service life. The upgraded ASTM standards provide an additional level of assurance that PEX tubing manufactured to these standards can withstand the potential oxidative effects of heavily chlorinated water.

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What's the difference between PEX and CPVC?

Answer

Crosslinked polyethylene (PEX) and chlorinated polyvinyl chloride (CPVC) are both used for plumbing systems. The PEX manufacturing process chemically joins individual polyethylene molecules through an extrusion process to create a highly flexible tubing product. With CPVC, the manufacturing process starts with PVC resin and adds additional chlorine molecules, which creates a much more rigid tubing product.

While both products are listed to their own respective ASTM standards for use in plumbing systems, PEX provides superior features, installation characteristics and longevity. For example, PEX systems offer:

- Reliable and visual connections

- Flexibility resulting in tighter bend radius

- Quick and simple fitting connections

- Safe air testing

- Fewer fittings

 

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