Copper is a traditional material for plumbing pipes and remains a popular option today. There are two main types of copper pipes that can be used together to outfit a whole plumbing system: Rigid copper: Rigid copper, sometimes called hard copper, is used throughout a house or building for the water supply.
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.
For residential plumbing, PEX piping is one of the best options due to its flexibility, durability, and resistance to freezing. It's also easier to install than traditional materials like copper, making it a cost-effective choice for both new construction and renovations.
PEX itself is stronger and arguably superior to copper in terms of reliability, especially in resistance to freezing. It's the fittings that have been problematic in the past.
High-Density Polyethylene (HDPE) Pipe HDPE pipes, manufactured from polyethylene resin, are a popular choice for water mains because of its durability and non-corrosive qualities.
Ability to handle pressure: PVC can withstand high water pressure, which makes it an excellent choice for the main supply line in your home.
Is PEX safe for drinking water? Yes, our PEX-a and PEX-b are both safe for drinking water. Our piping system solutions are all third-party tested through IAPMO or NSF to the following standards: NSF/ANSI 61 drinking water systems components - health effects.
It has become expensive, can still corrode based on pH levels of water, and in cold climates, frozen water can cause copper pipes to burst.
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: 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.
Copper Pipes
Copper pipes remain popular among plumbers and homeowners alike because they are corrosion-resistant and best suited to protect the quality of the water. Copper pipes are able to handle high water pressure and are tolerant of both hot and cold water temperatures.
Compared to copper piping, which would cost $8,000 – $10,000 to replace in a two-bathroom home, PEX would only cost on average $4,000 – $6,000 – offering significant cost-saving opportunities. PEX is also a flexible plastic hose that can be snaked into walls with minimal damage.
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.
No single pipe/tubing system used in the US has been 100% problem free, and PEX is no exception. Some of the disadvantages of PEX include: It cannot be used outside. It cannot be recycled.
Fragility and Brittleness. ASTM F441 CPVC pipes can become brittle over time, particularly under stress or extreme temperatures. This brittleness makes them more prone to cracking and failure. In colder climates, this issue is exacerbated as pipes can freeze and break easily.
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.
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 pipe is more durable than rigid pipe in cold weather but is still susceptible to burst in extreme conditions.
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.
Generally, PEX is used in new home construction more often than copper due to the fact that it's easier to install, less expensive, and more durable against freezing conditions.
PEX Pipe. PEX, a cross-linked polyethylene pipe, is considered by some to be the greatest innovation for DIY plumbers. PEX pipes often replace copper for hot and cold water in residential retrofits. They are easy to cut, install and connect and less costly than copper.
PVC is most commonly used for drain, waste, and vent lines. It is not recommended for use in potable water lines because it can leach chemicals into the water.
Bacteria
In extreme cases, the bacteria caused by moisture can penetrate inside the PEX pipes and contaminate the water.
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.