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Benefits of PEX Plumbing: Comparing Pros and Cons

pexPEX
(photo: amazon)

Are you a DIY enthusiast looking for a cost-effective and durable plumbing material for your next project? Look no further than PEX!

PEX, or cross-linked polyethylene, is a flexible plastic tubing material that offers numerous benefits over traditional plumbing materials like copper and PVC. From its corrosion resistance to ease of installation, PEX is an excellent choice for both residential and commercial plumbing and heating systems.

In this article, we'll explore many benefits of PEX plumbing in your DIY plumbing projects and why it's worth considering for your next plumbing installation or repair.

Benefits of PEX plumbing and things to consider

Is PEX good for plumbing?

PEX has become a highly popular choice for plumbing/water heating applications due to its numerous benefits and advantages over traditional plumbing materials like copper or galvanized steel.

This flexible and durable material resists corrosion and freeze damage, making it an ideal option for both hot and cold water applications.

In addition, PEX is less expensive than other plumbing materials, requires fewer fittings, and can be installed more quickly and easily, resulting in significant savings on labor costs.

PEX plumbing systems also offer a quieter experience than metal pipes and have a lower risk of leaking. It is safe for use in potable water systems and is highly resistant to bacterial growth, ensuring a hygienic option for plumbing systems.

Overall, PEX is an excellent choice for plumbing applications thanks to its durability, ease of installation, and cost-effectiveness.

Is PEX good for heating?

PEX is a great option for heating applications, particularly in radiant heating systems, due to its flexibility and ease of installation in various configurations.

In radiant floor heating systems, a network of PEX pipes circulates hot water or other fluids through the floors or walls of a building, providing a more efficient and comfortable heating solution compared to traditional forced-air systems.

Thanks to its resistance to scale buildup and corrosion, it is ideal for use in hot water heating systems.

Furthermore, PEX has a low thermal conductivity, which helps to insulate the heated water better than other materials such as metals, minimizing heat loss and enhancing energy efficiency.

By using PEX in radiant heating systems, homeowners can reduce their energy consumption, lower their heating costs, and enjoy a more comfortable living environment.

Is PEX resistant to high temperatures?

PEX is designed to withstand a range of temperatures, but its temperature resistance can vary depending on the specific type of PEX used.

Generally, PEX is rated to withstand temperatures of up to 200 F, which is sufficient for most plumbing and heating applications.

However, there are some types of PEX that are specifically designed for use in high-temperature applications, such as PEX-Al-PEX, which is rated to withstand temperatures of up to 210 F.

Choosing the appropriate type of PEX for the specific application is crucial to guarantee optimal performance and avoid damage resulting from exposure to high temperatures.

Can I use PEX for pools?

There are many benefits of PEX plumbing use where the strength and flexibility truly standout, making it an excellent choice for many plumbing and heating applications.

However, it is important to note that PEX is not recommended for use in swimming pool installations due to its limited resistance to certain chemicals found in pool water, such as chlorine. Over time, these chemicals can damage PEX pipes and potentially cause leaks, leading to costly repairs.

In addition to chemical damage, PEX is also vulnerable to degradation from direct exposure to sunlight (UV lights). As a result, it is generally advised to use specialized pool plumbing materials such as PVC that is designed to withstand exposure to pool chemicals and sunlight, ensuring the longevity and durability of the plumbing system.

By utilizing specialized pool plumbing materials, homeowners can avoid potential problems caused by chemical exposure and sunlight damage, providing a more reliable and long-lasting solution for their swimming pool plumbing needs.

Where not to use PEX?

PEX is a versatile plumbing material that can be used in a variety of applications, offering many benefits, but there are some situations where it may not be the best choice.

Here are some scenarios where PEX may not be recommended:

  • Outdoor use: PEX should not be used for outdoor applications where it will be exposed to direct sunlight or UV radiation, as this can cause the material to deteriorate and become brittle over time.
  • High-temperature applications: While PEX can withstand a range of temperatures, it may not be suitable for use in very high-temperature applications, such as steam heating systems.
  • Chlorinated water: If the water supply contains high levels of chlorine or other harsh chemicals, such as pools, PEX may not be the best choice, as these chemicals can cause damage to the PEX over time.
  • Recirculating hot water systems: In recirculating hot water systems, where hot water is constantly circulating through the pipes, PEX may not be the best choice, as the constant temperature changes can cause the material to degrade over time.
  • Gas lines: PEX should not be used for gas lines, as it is not rated for use with natural gas or propane. The most common gas piping material is black steel.

Is it hard to install PEX and what are the main issues during installation?

PEX plumbing is generally considered to be easier to install than traditional plumbing materials such as copper or galvanized steel. The flexibility of PEX allows for easier installation in tight spaces and around corners, and it requires fewer fittings, which can save time and reduce the risk of leaks.

PEX plumbing can be installed using a variety of methods, including crimp, clamp, or push-to-connect fittings. These methods do not require the use of solder or glue, making them easier and safer to work with, even for DIYers with limited plumbing experience.

Here are some common issues that can arise during PEX installation:

  1. Proper fittings: The correct installation of fittings is crucial for ensuring a successful PEX installation. Failure to properly install fittings or using the wrong type of fittings can result in leaks and other issues.
  2. Kinking: PEX is flexible, but it can still kink if it is bent too sharply or if it is not properly supported. Kinks can restrict water flow and cause damage to the PEX pipe.
  3. Crimping: PEX requires a crimping tool to secure fittings to the pipe. Improper crimping can cause leaks or fittings to detach from the pipe.
  4. Expansion and contraction: PEX can expand and contract with changes in temperature, which can cause the pipe to shift or pull away from fittings if it is not properly supported.
  5. UV exposure: PEX should not be exposed to direct sunlight or UV light, as this can cause the material to degrade and become brittle over time.

Overall, while there are some common issues that can arise during PEX installation, most of these issues can be avoided by following manufacturer's instructions and best practices for PEX installation, and by using high-quality materials and fittings.

PEX vs. Copper

PEX and copper are two of the most popular materials for plumbing systems. Here are the main differences between PEX and copper:

  1. Cost: PEX is generally less expensive than copper, both in terms of the material cost and the labor required for installation.
  2. Flexibility: PEX is more flexible than copper, which makes it easier to work with and allows for easier installation in tight spaces.
  3. Corrosion resistance: While copper is highly resistant to corrosion, it can still corrode over time, especially in areas with hard water or high levels of chlorine. PEX, on the other hand, is highly resistant to corrosion and is not affected by hard water.
  4. Durability: While both PEX and copper are sturdy materials that can endure various temperatures and pressures, PEX is more resistant to freeze damage than copper due to its flexibility. PEX can expand and contract with temperature changes, making it less prone to burst or crack in freezing conditions.
  5. Noise: PEX is a quieter material than copper, as it doesn't make the same "water hammer" noise that copper pipes can make.
  6. Health concerns: Copper pipes can potentially leach small amounts of copper into the drinking water, which can be a concern for some people. PEX, on the other hand, is a safe and inert material that does not leach any harmful substances into the water.

Overall, both PEX and copper have their advantages and disadvantages, and the choice between the two will depend on the specific needs of your plumbing system and your personal preferences.

PEX vs. CPVC

While both PEX and CPVC (Chlorinated Polyvinyl Chloride) are suitable for hot and cold water systems, here are some key differences between the two:

  1. Flexibility: PEX is more flexible than CPVC, which makes it easier to work with and allows for easier installation in tight spaces.
  2. Cost: PEX is generally less expensive than CPVC, both in terms of the material cost and the labor required for installation.
  3. Resistance to freezing: PEX is more resistant to freeze damage than CPVC, which can crack or split if it freezes.
  4. Chemical Resistance: CPVC is more resistant to certain chemicals than PEX, making it a better choice for some industrial applications.
  5. Temperature and pressure rating: CPVC has a higher temperature and pressure rating than PEX, which makes it a better choice for hot water applications or high-pressure systems.
  6. Installation method: PEX is typically installed using a crimping tool or compression fittings, while CPVC is typically installed using solvent cement and threaded fittings.
  7. Health concerns: CPVC can potentially leach small amounts of chemicals into the drinking water, which can be a concern for some people. PEX, on the other hand, does not pollute water.
  8. Longevity: PEX has a shorter track record of use in plumbing systems than CPVC, but is generally considered to have a longer lifespan due to its resistance to corrosion and chemical degradation.

PEX vs. Galvanized pipes

While PEX and galvanized pipes share some similarities and benefits, they also have distinct differences in terms of their properties, installation methods, and suitability for different applications.

  1. Corrosion resistance: Galvanized pipes are coated with zinc to prevent corrosion, but over time, the coating can wear away, exposing the iron underneath to rust. PEX, on the other hand, is highly resistant to corrosion and will not rust or corrode.
  2. Installation: PEX is more flexible and easier to install than galvanized pipes, which are rigid and require threading and welding to connect.
  3. Cost: When it comes to material expenses and installation labor, PEX pipes are usually more affordable than galvanized pipes.
  4. Health concerns: If galvanized pipes are old or corroded, they have the potential to contaminate drinking water with lead. In contrast, PEX is considered a safe and inert material that does not introduce any hazardous substances into the water supply.
  5. Durability: PEX is a durable material that can withstand a range of temperatures and pressures, while galvanized pipes can be prone to leaks and corrosion over time.

Overall, PEX is a popular choice for plumbing systems due to its flexibility, corrosion resistance, and ease of installation, while galvanized pipes are an older technology that may be found in some older homes but are being phased out in favor of newer, more reliable materials like PEX.

PEX vs. PVC

PEX and PVC have both similarities and differences, including benefits, that should be taken into account when choosing a piping material for a specific plumbing application.

  1. Flexibility: PEX is more flexible than PVC, which makes it easier to work.
  2. Resistance to freezing: PEX is more resistant to freeze damage than PVC, which can crack or split if it freezes.
  3. Cost: Compared to PVC materials, PEX is generally more expensive in terms of cost.
  4. Durability: PEX is a durable material that can withstand a range of temperatures and pressures, while PVC can become brittle over time and may crack or break.
  5. Health concerns: PVC can potentially release small amounts of chemicals into the drinking water, which can be a concern for some people. PEX, on the other hand, is a harmless material that does not leach any harmful substances into the water.
  6. Compatibility with other types: PEX is compatible with both copper and PVC systems, which makes it a versatile material for retrofitting or upgrading existing plumbing systems. In contrast, PVC is only compatible with other PVC pipes and fittings, which limits its applications in certain plumbing systems.
  7. Temperature and pressure rating: PVC is a better choice for low-pressure systems or applications with lower water temperatures.

While PEX is used mainly in plumbing systems and radiant heating, PVC is commonly used for drainage and waste systems or low-pressure water systems.

PEX vs. ABS

There are some significant differences between PEX and ABS (Acrylonitrile Butadiene Styrene), even though they are both commonly used materials in plumbing systems.

  1. Flexibility: Compared to ABS, PEX is more flexible, making it easier to work with and allowing for simpler installation in tight spaces.
  2. Resistance to freezing: Compared to ABS, PEX is more resistant to freeze damage, as ABS can crack or split if exposed to freezing temperatures.
  3. Cost: ABS pipes are relatively inexpensive and readily available, making them a popular choice for low-cost plumbing systems. In contrast, PEX pipes may be more expensive due to their durability and flexibility, which can make them a better long-term investment.
  4. Health concerns: ABS pipes have the potential to release small amounts of chemicals into drinking water, which can be a concern for individuals who prioritize water quality and safety. The leaching of chemicals occurs due to ABS's composition, and it may be more pronounced when water temperatures are high or when there is prolonged contact time. In contrast, PEX pipes are an inert material that does not contain any harmful substances that could potentially contaminate the water. Thus, PEX is considered a safer option for those who want to ensure the purity and safety of their drinking water.
  5. Temperature and pressure rating: ABS has a lower temperature and pressure rating compared to PEX, which means that it is better suited for low-pressure plumbing systems or applications that involve lower water temperatures. However, for high-pressure systems and applications that involve hot water, PEX is the preferred choice due to its superior performance under these conditions.

Overall, PEX is a popular choice for plumbing systems due to its flexibility, durability, and resistance to freezing, while ABS is commonly used for drainage and waste systems. The choice between PEX and ABS will depend on the specific needs of your plumbing system and your personal preferences.

Conclusion

In conclusion, homeowners can enjoy numerous benefits of PEX plumbing making it the best choice for homes.

With superior flexibility, PEX can bend and curve around corners and obstacles, reducing the need for extra fittings and joints.

Its resistance to freeze damage ensures that the pipes won't burst or crack during cold weather.

PEX is also an inert material that doesn't leach harmful chemicals, ensuring safe drinking water.

Its superior resistance to corrosion, rust, and scale buildup ensures long-lasting performance and reduces maintenance requirements.

PEX has a longer lifespan than traditional materials and is compatible with a wide range of fittings and connectors, making it easy to install and customize plumbing systems.

Overall, PEX provides a reliable, safe, and efficient plumbing system that can meet the demands of modern living.

FAQ

Are PEX pipes toxic?

No, PEX pipes are not toxic. PEX is a type of plastic tubing made from cross-linked polyethylene, which is a safe and non-toxic material. PEX is approved for use in potable (drinking) water systems by most plumbing codes and regulatory agencies. However, it is important to use PEX pipes and fittings that are certified by a reputable third-party organization, such as NSF International, to ensure that they meet safety standards. In addition, it is important to follow proper installation procedures and to avoid exposing PEX pipes to high temperatures or harsh chemicals, which could potentially cause damage or degradation of the material.

Can PEX pipes freeze and burst?

PEX pipes are less prone to freezing and bursting than some other types of pipes, but they can still freeze and burst under certain conditions. PEX pipes are more flexible than metal pipes and can expand slightly when frozen without cracking or bursting, but if the water inside the pipes freezes solid, it can cause the pipes to burst. To prevent PEX pipes from freezing and bursting, it is important to properly insulate them and to keep the temperature in the area above freezing. If you suspect that your PEX pipes may be frozen, it is important to thaw them out slowly to prevent damage.

Should I insulate my PEX pipes?

Yes, it is generally recommended to insulate PEX pipes, especially if they are in unheated or poorly insulated areas. Insulation helps to prevent heat loss, reduce energy costs, and protect against potential freezing and bursting. It is important to use the appropriate type of insulation to avoid damage to the pipes.

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