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If your home, non-residential property, or the common area of your home or property contains Uponor brand fittings and plumbing 
components made of high zinc content brass, you may be eligible for benefits from Class Action Settlements. PEX PROBLEMS 
One way to identify if your building qualifies is to look inside the electrical panel and see if you have a a yellow sticker that say “Uponor,” “Wirsbo” or “Aquapex.” 
Alternatively, you may hire a plumber to identify your plumbing (though you will be responsible for payment of these costs). If you do hire a plumber, make sure you 
keep a copy of all documentation (such as color photos) to confirm the products are present. BRASS FITTING PROBLEMS

 Homeowners and landlords claiming that Uponor Corp. high-zinc “yellow brass” fittings they had installed were prone to corrosion 
and leaks urged a Minnesota federal judge on Monday to grant final approval to a settlement worth up to $21 million. 
Uponor attorney John R. Schleiter told Law360 on Tuesday that the “evergreen” agreement would require Uponor to pay a minimum
of $3 million into a common benefit fund. That fund would provide individual class members with up to $60,000 for residential property damage claims and up to $100,000 for owners of nonresidential buildings. PEX  Brass Failures  

With the sudden increase in the use of PEX in recent years, failures in PEX plumbing systems have been observed. Failures can be linked to two areas; 
the pipe and the fitting. The pipe can fail when exposed to chlorine within the water, or over exposure to sunlight before installation. In addition, PEX pipe 
has also been found to be permeable when exposed to some solutions, including oxygen and some petroleum products, and can leach toxic chemicals 
from the pipe material. As far as the fitting, the leading cause of failure in a brass fitting used with PEX is caused by dezincification. This causes the fitting
to corrode and eventually create leaks. Brass PEX Failures

How Safe is PEX Piping?
As with any type of piping that will be used to transport drinking water, the safety of the pipes must be evaluated. We’ve already explored the chemical leaching downfalls of traditional piping, but what about PEX pipes? Does chemical leaching exist here as well?  PEX Chemicals 

As a result of this advocacy, the state has adopted an unprecedented set of restrictions on the use of PEX. The new regulations provide measures to 
address: (1) the vulnerability of PEX pipe to permeation by outside contaminants such as gasoline or solvents; (2) the vulnerability of PEX to premature failure when exposed to sunlight; (3) the failure of PEX brass fittings due to dezincification and stress crack corrosion; (4) the potential for traditional 
PEX pipe to fail when installed in continuously recirculating hot water systems; and (5) the potential health impacts from the leaching of chemicals 
such as methyl tertiary-butyl ether (MTBE) from PEX pipe. MTBE PEX


 After the engineering design for a plumbing system is done, the contractors are only liable for workmanship, and the manufacturer is only liable for materials. The insurer
is liable for everything else. The insurer must be aware of the pitfalls of a water system installation to both write the exclusions and investigate for liable cause in the 
event of a failure. This article discusses a very popular plumbing material commonly referred to as PEX and addresses issues that may not be found in the actuarial 
tables. PEX RISK

Uponor has previously admitted its brass fittings were defective and could cause property damage; however, the distributor allegedly failed to provide adequate compensation to property owners whose homes, businesses, or other residential properties were damaged by the defective brass fittings.If you believe your property has been damaged by 
faulty plumbing parts from Uponor, you may be entitled to compensation. Attorneys are currently reviewing legal claims against the distributor and would like to hear from anyone who believes they may have Uponor’s allegedly defective 
fittings installed in their homes.  DEFECTIVE FITTINGS

PEX is NOT Green -  PEX is Currently Non-Recyclable
One of the most significant problems with PEX pipes is that it is non-recyclable. That means, there is no way of getting 
discarded PEX materials back in use. Research is on to figure out ways of effectively recycling this material, which is also 
used in radiant floor heating installation. 
Read more at Buzzle

PEX (E.P.)  EP  Engineered Polymer Fitting are being phased out and discontinued.
Uponor Pex is Reverting to Brass Fittings, the new Brass Fittings are a new Lead Free LF formula. 

Here are some outdated Videos  

EP  Engineered Polymer Fittings

Published on Jun 14, 2010

Uponor engineered polymer (EP) fittings are a strong, durable and cost-effective solution for commercial plumbing and residential PEX 

Uponor engineered polymer (EP)



Unlike metal alternatives, PEX plumbing systems are immune to corrosion and mineral buildup.


Uponor PEX plumbing systems retain more heat in hot-water lines and resist condensation on cold-water lines.


Uponor PEX plumbing systems are backed by a 25-year warranty when installed by an Uponor-trained professional.


For more than 35 years, over 12 billion feet of Uponor PEX-a tubing is installed worldwide.


An Uponor PEX plumbing system dampens rushing water noise and eliminates water hammer and singing pipes.


Our unique ProPEX® fitting system assures a strong connection for consistent, leak-free plumbing systems.

Industry News

Uponor’s California PEX Microsite Receiving Recognition

Plumbing & Mechanical magazine recently posted an article online about Uponor’s new microsite,, which is designed to educate and inform the plumbing industry about PEX.
To read more,Click Here.

Uponor DC Opening on P&M Website

News of our new distribution center in Lakeville, Minn., is spreading fast. To see an article on Plumbing & Mechanical's website about the opening,Click Here.

Your Resource for PEX Plumbing Systems

On Jan. 22, 2009, the California Building Standards Commission (CBSC) certified the Environmental Impact Report (EIR) on crosslinked polyethylene (PEX) tubing and unanimously adopted regulations approving PEX water distribution systems into the California Plumbing Code, set to take effect Aug. 1, 2009.

Now contractors and consumers finally have access to an environmentally superior product that will provide a durable solution to the state's aggressive water conditions, while meeting California’s high standards for drinking-water quality.

Conducted from October 2007 through December 2008, the EIR evaluated PEX tubing on its impact on air quality, water quality and performance, as well as PEX tubing installation, use and disposability and manufacturing processes in the areas of waste, recycling, energy consumption and natural resources.

The EIR concluded the adoption of PEX tubing into the California Plumbing Code with proposed regulations would be “an environmentally superior action with respect to public health and hazards, water quality and air quality.”

In fact, millions of feet of PEX tubing are already in service in plumbing applications throughout California, due to the fact that 180 municipalities and counties within the state have already approved the use of PEX tubing.

To continue our mission of supplying our professional partners with building system solutions, Uponor is also launching a complete line of lead-free brass transition fittings and valves that meet California lead-free legislation and exceed the requirements of the United States Safe Drinking Water Act. Combining these fittings and tubing with our extensive engineered plastic (EP) offering and our innovative ProPEX® Out-of-the-Wall Support System provides a complete lead-free plumbing solution from the inlet to the faucet

 Benefits of Uponor PEX-a Tubing

  • Resists corrosion, pitting and scaling
  • Eliminates water hammer and singing pipes
  • Unique ProPEX® expansion fittings create strong, durable connections without the need for torches, glues, solvents or gauges
  • Flexible, with the smallest bend radius of all PEX tubing, reducing the number of necessary fittings
  • ProPEX connections cannot be dry fit; never a question if the fitting is made properly
  • Highly freeze resistant
  • Backed by a 25-year limited warranty when installed by an Uponor-trained plumbing professional

 Codes, Standards and Listings

Hydrostatic Temperature and Pressure Ratings:  ● 200°F (93.3°C) at 80 psi ● 180°F (82.2°C) at 100 psi ● 73.4°F (23°C) at 160 psi                       ● 120°F (48.9°C) at 130 psi (1/2", 3/4" and 1" AquaPEX® only)

Manufacturing Standards:  ● ASTM F876 ● ASTM F877 ● ASTM F2023 ● ASTM F1960 ● ANSI/NSF Standard 14 ● ANSI/NSF Standard 61              ● UL 1821 ● ULC-ORD C199P ● CAN/CSA B137.5

Product Listings:  ● IAPMO ● CSA ● HUD ● UL ● NSF ● ITS ● ICC

Applicable Codes:  ● IPC ● UPC ● NSP ● IMC ● UMC ● NPC of Canada   ● NBC of Canada

Fire-rated Assemblies for United States:  ● K913 - Two-hour concrete floor/ceiling assembly ● L557 - One-hour wood frame floor/ceiling assembly ● U372 - One-hour wood frame wall assembly        ● V444 - One-hour steel stud wall assembly

Fire-rated Assemblies for Canada:  ● WC/FCA 120-01 - Two-hour concrete floor/ceiling assembly ● WC/FCA 120-02 - Two-hour concrete floor/ceiling assembly ● WC/FCA 60-01 - One-hour wood frame floor/ceiling assembly ● UW/WA 60-02 - One-hour wood frame wall assembly ● UW/WA 60-01 - One-hour steel stud wall assembly

Warnock Hersey Plenum Rating:  ● 25 flame spread/50 smoke developed (plenum rated) to ASTM E84 ● CAN/ULC S102.2

Uponor offers several plumbing products, including our extensive engineered plastic (EP) offering and ProPEX® Out-of-the-Wall system for a complete lead-free plumbing system from inlet to faucet.

What is PEX?

An Uponor plumbing system features Engel-method crosslinked polyethylene (PEX) tubing. This is a flexible plastic tubing product that has been used for more than 35 years in radiant floor heating, plumbing and fire safety systems.

PEX is classified into three categories: • PEX-a (Engel or peroxide method) • PEX-b (Silane method) • PEX-c (Electron beam or radiation method)

The PEX tubing industry considers Engel-method PEX-a tubing superior because the crosslinking is done during the manufacturing process when polyethylene is in its amorphic state (above the crystalline melting point). Because of this, the degree of crosslinking reaches around 85%, resulting in a more uniform product with no weak links in the molecular chain.

The properties in PEX-a tubing make it the most flexible PEX on the market, allowing for the tightest bend radius available — as little as 3½" for ½" tubing. Its flexibility also greatly reduces the instance of kinked tubing. However, because of the thermal memory of PEX-a, if a kink does occur, a simple shot from a heat gun returns the tubing to its original shape.

The Unique ProPEX® Connection

The shape memory of PEX-a tubing allows it to expand and then shrink back to normal size. This allows for the use of Uponor’s unique ProPEX® expansion fittings, which capitalize on the shape memory of PEX-a to create strong, durable and reliable connections without the use of dangerous torches, glues or solvents.


Uponor PEX plumbing systems are backed by a 25-year warranty when installed by an Uponor-trained professional. 

Uponor PEX "a" has a 25 year warranty and is 15-% 50% less in price.

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