PEX piping is made from cross-linked polyethylene, which is incredibly vulnerable to chlorine. Chlorination will drastically shorten the piping's lifespan by wearing down its durability. This process can cause water leaks and even burst pipes.
They hate PEX because it's MORE reliable than copper, and much faster/easier to install = less money for them. It's also much less expensive which means they don't make as much on materials if they charge that way.
Like any other material, multiple factors could lead to problems with PEX. Some of these factors could be simple over-chlorination of the water running through it or dezincification, which could weaken and break down the fittings used on the piping. Another issue could be the piping failing to pass a pressure test.
Currently, PEX plumbing is one of the most widely used plumbing systems around the world. It was temporarily banned in California for a while due to concerns about toxic materials but this was later disproven by laboratory tests.
PEX PIPING IS NOT Leak Resistant
There is a minimum allowable bend radius for PEX pipe and occasionally an installer will exceed the allowed bend radius and sometimes may even kink the pipe. Extreme bends and kinks place a very high local stress on the wall of the pipe making the pipe susceptible oxidative degradation.
The problem with PEX seems to be that it's contaminated -- it leaves the factory with chemicals used in its manufacture still on the pipe. In time it cleans up, but during that time those chemicals are going into the water.
Some studies suggest that chemicals used in the manufacturing process can leach into the water supply, posing risks to human health. The possibility of chemical leaching from PEX piping into drinking water has been a significant factor in its ban.
PEX pipe can be used as a service line based on its corrosion resistance to soil and water, its long life and its oxidative resistance. Our PEX pipe is not suitable for use in areas where the soil is or may become contaminated, including soil used for backfilling.
PEX Pipe Is Vulnerable
Rodents Chewing Through PEX Pipe is a common problem in our area. It doesn't matter how old your home is, if you have an attic, you need to watch for rodent damage to PEX Pipe or PVC. If you're hearing rustling noises coming from the attic, it's time to do an inspection.
PEX pipe is more durable than rigid pipe in cold weather but is still susceptible to burst in extreme conditions.
PEX: Due to its flexibility and durability, PEX piping should last at least 50 years. PVC / CPVC: Under typical conditions, these pipes should last up to 100 years. Keep in mind that PVC pipes are often used for drainage because extreme heat can damage them.
PVC and CPVC have more strength and durability than PEX because they are more rigid, making them better suited to outdoor applications where the piping may be subjected to trauma. Because of its rigidity, PVC is less flexible than PEX. You must install an elbow instead of simply bending it around a right angle.
PEX Pipe Class Action Lawsuits
A number of manufacturers, including Uponor, Viega, Nibco and Zurn, have already been sued over their PEX piping products.
PEX pipes are very thick but they are still susceptible to rodent damage that can cause pipes to crack or break. Possible Leaching: Although uncommon, some homeowners and plumbing companies have reported a few PEX pipes leaching harmful contaminants like BPA (Bisphenol A) into the water supply.
CPVC is More Effective at Maintaining Water Quality than PEX
Biofilm Growth Potential: Biofilms, including Legionella and other harmful bacteria, can grow inside residential water pipes.
PEX pipes are the top option for plumbing in Florida. But that doesn't mean you should automatically pass up a house that uses other materials.
Some PEX pipe manufacturers use cost-cutting processes which lead to pipes that aren't uniform in composition and are defective. Defective PEX pipes will not last 50+ years as advertised and quickly degrade and become brittle when exposed to hot chlorinated water. These pipes are destined to fail.
It's a good idea to install 1/2-inch or 3/4-inch PEX for your main lines for adequate water flow. When replacing old water supply lines with PEX the standard is to use the same size plumbing, although you can transition from 3/4-inch to 1/2-inch plumbing with an adapter.
By giving them an easy water source, you'll significantly reduce chances of damage as the poison takes time to work. 2. Use Traps Instead of Poison: Another approach to reduce damage to plastic pipes is to use rodent traps instead of poison.
Plastic pipes, such as CPVC, and PEX are pipe materials that are safe for drinking water.
The Aquatherm Green Pipe is safest for potable water, including domestic water piping systems. Made from polypropylene, it doesn't react with water, preventing leaching, corrosion, scaling and erosion, major causes of water contamination and long-term piping failure. It is installed using heat fusion.
PEX A offers higher burst resistance, capable of withstanding up to 500 PSI in extreme cold, while PEX B, being more rigid, is less resilient.
Material Concerns: One of the primary concerns about Pex plumbing is the material itself. While Pex pipes are undoubtedly flexible, making them easier to install in tight spaces, they are not as durable as traditional materials like copper or even PVC.
PEX Plumbing in your Area
Although PEX tubing is approved by all major building codes and major model plumbing codes, it still has not received acceptance with local codes in some parts of the country. For example, PEX tubing has only recently been allowed for use in the state of California.
The lifespan of PEX pipes is one of their most appealing features. On average, PEX pipes can last anywhere from 40 to 50 years, and in some cases, even longer.