PVC and
One advantage of PEX over PVC is its flexibility, which makes installation easier, especially in tight spaces. PEX is also resistant to freezing temperatures and has fewer joints, reducing the risk of leaks.
Longevity. In the right conditions, PVC pipes can last upwards of 70 years. Both ABS and PEX pipes have about 40-50 years of life.
Defective Manufacturing ISSUES
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.
Cross-linked Polyethylene (PEX) pipes are the go-to pipes trusted by plumbers everywhere to safely deliver hot and cold water throughout your home.
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.
PEX pipe is not approved for outdoor applications and is not approved for continuous UV exposure. PEX pipe should not be stored in direct sunlight.
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.
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.
Copper Pipes
The most traditional of plumbing materials, copper is the most widely used option due to its durability and reliability. Copper's lifespan can reach well over 100 years at a time with superior corrosion resistance and is easily manageable with hot and cold water.
CPVC is More Effective at Maintaining Water Quality than PEX
Third party studies show that CPVC piping, such as FlowGuard Gold pipes and fittings, consistently demonstrate a lower risk of biofilm formation than PEX.
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.
And when it comes to preventing these headaches, PEX pays off. Not only does it add value to the installation because it's more freeze resistant than pipes like CVPC and copper, but it's also superior in every season, cold or not. Whether it's PEX-a, -b or –c, this pipe type is more freeze resistant than rigid pipes.
ABS is the most commonly used, but PVC has a longer history in Europe. ABS is easy to install and is resistant to warping and deterioration in extreme temperatures. If you're installing a new plumbing system in your home, ABS is the best choice.
While touted as an inexpensive, durable choice for communities seeking to replace their lead service lines, research shows that dozens of harmful chemicals, including many for which there are no drinking water standards, can leach into tap water from PVC and CPVC pipe walls, fittings, gaskets, and the cements used for ...
Cost Comparison
Galvanized steel pipes tend to be the most expensive option and can be costly to install and repair. Copper can be a costly material, but it may still be a good choice if you value durability and reliability.
Quality of Water. One of the biggest downsides of PEX plumbing is that some of them affect the taste and odor of water. It's important to know about this risk before installing PEX water lines in your house. In some cases, the smell and taste are so unpleasant, that people have to replace the pipes all over again.
PEX was developed in the 1960s. PEX tubing has been in use in many European countries for plumbing, radiant heating and snow melt applications since that time.
Chlorine Degradation Near PEX Fittings
Improper installation is a common cause of leaking in and around PEX fittings, but not the only cause. One issue PEX systems have to contend with is incompatibility with local water conditions.
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 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.
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 is safe for drinking water in households and commercial systems. NSF International has teams of toxologists and other technical professionals who administer the NSF 61 standard which requires all components in a water system to be safe for drinking water. This includes PEX pipe systems with drinking water.
In most cases, PEX is extremely durable and lasts up to 50 years or more. PEX piping is also less likely to crack or break than metal pipe because it does not expand and contract as much when heated and cooled.