PEX plumbing is becoming more popular in construction and home improvement due to its numerous advantages over traditional materials like copper and PVC. But what exactly is PEX, and why do more people choose it for plumbing systems? Let’s dive into some important PEX plumbing facts to understand this innovative material better.
What is PEX Plumbing?
PEX stands for cross-linked polyethylene, a flexible plastic tubing used for water supply lines. German inventor Dr. Thomas Engel developed PEX in 1968 and introduced it to the European market in 1972. In 1984, PEX arrived in North America for use in radiant floor heating systems. Since then, it has become a popular choice for various plumbing applications.
Types of PEX
Three main types of PEX tubing exist: PEX-A, PEX-B, and PEX-C. Each type differs in its manufacturing process and has unique characteristics:
– PEX-A uses the Engel method and offers the most flexibility and resistance to kinking.
– PEX-B uses the Silane method and accounts for 80% of the world’s PEX market, making it the most common type.
– PEX-C relies on the Electron Beam method, making it the least flexible, but suitable for certain plumbing needs.
Another variation, PEX-AL-PEX, has an aluminum layer inside the tubing, adding extra strength and preventing oxygen from penetrating the system.
Benefits of PEX Plumbing
PEX tubing costs at least three times less than copper, making it an affordable option for homeowners and builders. Here are more PEX plumbing facts that highlight its benefits:
1. Non-Corrosive Material: PEX does not corrode like copper pipes because it is a dielectric material. This property ensures a longer lifespan for plumbing systems.
2. Flexible and Easy to Install: PEX bends around corners and obstacles due to its flexibility. This flexibility reduces the number of fittings and connections, which lowers the risk of leaks. Installers can make watertight, leak-resistant connections with PEX without needing torches, glues, or gauges.
3. Resistance to Temperature and Pressure: PEX tubing withstands temperatures up to 200 degrees Fahrenheit. It also handles high pressure, with ratings of 160 psi at 73.4°F, 100 psi at 180°F, and 80 psi at 200°F. These properties make it suitable for both hot and cold water applications.
4. Long Life Expectancy: PEX lasts between 50 to 100 years, depending on usage and environmental conditions.
5. Safe for Drinking Water: PEX contains no Bisphenol A (BPA) or other harmful chemicals. It meets NSF and CSA certifications for safe drinking water use.
6. Noise Reduction: PEX minimizes noise by absorbing pressure surges. This flexibility makes it quieter than rigid pipes such as copper or PVC.
7. Chlorine Resistance: Most PEX tubing earns a chlorine resistance rating of 5, the highest available. This feature makes it ideal for municipal water systems.
Considerations for PEX Plumbing
Despite its benefits, consider a few factors when using PEX plumbing:
1. Vulnerability to Sunlight: PEX cannot withstand ultraviolet (UV) rays. Prolonged exposure to direct sunlight can degrade the material over time.
2. Pest Damage: PEX tubing can suffer damage from insects like termites, which may pierce the tubing and cause leaks.
3. Primarily for Interior Use: Use PEX piping mostly for interior applications. However, you can bury it underground in specific conditions, such as flat ground without sharp objects.
4. Special Tools Required for Cutting: Use specific tools like ratchet or pipe cutters to cut PEX. The process does not require soldering, simplifying installation.
PEX vs. Copper and PVC
When comparing PEX to copper and PVC, several factors make it stand out:
– Cost: PEX costs much less than copper and even some PVC options.
– Ease of Installation: PEX requires fewer connections and fittings due to its flexibility, reducing installation time and costs.
– Durability: PEX does not corrode and resists scale and chlorine, which contributes to its long lifespan. It also shows greater impact resistance than CPVC.
Popular Applications of PEX Plumbing
PEX serves many applications due to its versatility, including:
– Residential Water Supply Lines: It functions well for hot and cold water supply lines in homes.
– Radiant Floor Heating Systems: PEX suits radiant floor heating systems because of its flexibility and ability to handle high temperatures.
– Snow Melting Systems: PEX works effectively in snow melting systems for driveways and walkways, thanks to its durability and resistance to temperature changes.
Market Share and Popularity
Currently, PEX holds more than half of the US plumbing pipe market share. Its popularity continues to rise because it offers a cost-effective, flexible, and durable alternative to traditional plumbing materials. More homeowners and builders choose PEX for new constructions and renovations.
Final Thoughts
Knowing these PEX plumbing facts will help you decide if it suits your home or project. PEX offers flexibility, durability, and cost-effectiveness, making it a modern solution for many plumbing needs. Whether installing new plumbing or replacing old pipes, PEX provides a reliable option with various benefits. Consult a professional plumber to ensure proper installation and maximize the advantages of PEX plumbing.
Have you installed PEX plumbing in your house? Share your thoughts and experience with PEX plumbing in the comments section.