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How can I tell if my PEX has a oxygen barrier? ?

PEX (cross-linked polyethylene) is a type of tubing used in plumbing, radiant heat and hydronic systems. It is commonly used in place of copper and PVC pipes because of its flexibility and resistance to corrosion. However, PEX can be further categorized based on whether or not it includes an oxygen barrier.

An oxygen barrier is a layer of material that prevents oxygen from entering a plumbing system, which can corrode metal components and cause bacteria growth. This layer is designed to protect against oxygen damage, improve energy efficiency and maintain the system’s integrity for a longer period of time.

To determine if your PEX tubing has an oxygen barrier, you need to inspect the tubing itself or refer to the manufacturer’s specifications. Most PEX with an oxygen barrier will look shinier and smoother than non-barrier PEX. You may also see the words “oxygen diffusion barrier” printed on the tube. Additionally, PEX manufacturers may use colors or stripes to identify tubing with an oxygen barrier.

If you are unsure if your PEX has an oxygen barrier, you should contact a qualified plumber. They will be able to inspect the tubing and determine if an oxygen barrier is present. They can also assist in selecting tubing that does have an oxygen barrier if your system needs it.

What do the markings on PEX pipe mean?

PEX (crosslinked polyethylene) pipes are widely used in plumbing and other related applications. While they are easy to install, they also require careful inspection to ensure they are installed correctly. One of the best ways to do this is to look at the markings on the PEX pipe.

These markings let you know the size, material and manufacturing quality control standards used in producing the PEX pipe. They also include manufacturer’s stamps that can help you to trace the product back to its origin and make sure it meets all building codes and regulations.


The markings on PEX pipes indicate their size. Every PEX pipe will have an outside diameter (OD) measurement expressed in millimeters or inches, along with an inside diameter (ID) measurement. They also include information about the type of material used in manufacturing the pipe. For example, PEX-A pipes are made from a type of polyethylene known as Engage, while PEX-B pipes are made from a material called Duron. It’s important to note the type of material used when buying PEX pipe, as different materials are suited for different applications.


PEX pipes also include markings indicating the manufacturing standards used in its production. This includes the American Society for Testing and Materials (ASTM) standard, which sets out specifications for the pipe’s pressure rating, temperature rating and pressure testing. This information is printed alongside the ASTM logo on every PEX pipe, so you can quickly identify the type and quality of the pipe you’re buying.


Finally, PEX pipes include the manufacturer’s stamp. This is a legally mandated requirement that allows you to track the product back to its source and make sure it meets all relevant building codes. The stamp should include information such as the manufacturer’s name and location, manufacturing date, batch number and PEX type.

Knowing how to read the markings on PEX pipes is essential for anyone installing them in their home or business. Not only does this help to ensure that the pipes are installed correctly, but it will also give you the peace of mind that your plumbing system is up to code and safe for use.

Can I use blue PEX for hot water?

Using blue PEX plumbing pipe for hot water is an acceptable practice, provided that the proper precautions are taken. PEX stands for cross-linked polyethylene, a type of plastic that is both flexible and strong. It is most commonly used in residential and commercial plumbing systems, and is often used to transport water from the main supply to individual fixtures like sinks, showers, and toilets.

Blue PEX is specifically designed for cold water applications and is not intended for hot water applications. The physical characteristics of PEX allow it to expand and contract with temperature changes, which can create pockets of steam in the pipes. Steam can change the shape of the pipes, weakening them and increasing the chance of failure. This is why most plumbing codes require that in-wall water PEX lines be rated for at least 180 degrees Fahrenheit.

At temperatures below 140 degrees, the risk of failure is minimal for blue PEX. Many people use this type of PEX for hot water applications and find it works fine, but it should never be used in applications where the temperature is above 140 degrees. If you do use blue PEX plumbing pipe for hot water, it is strongly recommended that you install a temperature limiting device such as a thermostatic mixing valve or pressure balancing valve to ensure the temperature of the hot water does not exceed 140 degrees. It is also a good idea to have access to manual shutoff valves so that you can quickly turn off the water supply if needed.

When using blue PEX for hot water applications, make sure you follow all local plumbing codes and thoroughly inspect all installations. Proper installation, maintenance, and usage of hot water systems with blue PEX is the best way to reduce the risk of failure or other damages.

Is there a difference between PEX and PEX B?

PEX, or cross-linked polyethylene, is a type of plastic plumbing pipe commonly used in residential and commercial buildings for water supply and hydronic heating applications. While PEX tubing is approved by the U.S. government for use in potable water systems, there are two different types of PEX: PEX A and PEX B.

The major difference between PEX A and PEX B is the way in which they are manufactured. PEX A is manufactured using the Engel method, which involves peroxide and higher temperatures. This method produces a softer and more flexible material with enhanced resistance to chlorine, acid and other chemicals. PEX B is made using the Silane method, which involves a lower temperature and moisture, and does not use any peroxide. As a result, PEX B has greater resistance to UV light and better freeze/thaw stability.

However, both types of PEX have similar characteristics and features. They are both available in various sizes and colors, and are resistant to corrosion, scaling and mineral accumulation. Both can be used in hot and cold water applications, as well as radiant floor heating and outdoor applications. Both also have a high recovery rate after stretching, and can withstand constant pressure and vibration over long periods of time.

While both types of PEX are suitable for many different applications, it is important to choose the right PEX type for the job. If a homeowner wants to replace the pipes in their home, it is best to talk to a professional plumber to determine whether PEX A or PEX B is the right piping material for the job.

What is the difference between red and black PEX pipe?

PEX pipe is a dynamic and versatile option for many different types of plumbing applications. It comes in both red and black varieties, each with unique benefits and drawbacks.

Red PEX pipes are best suited for hot water applications, such as the lines that run from your water heater to your fixtures. This plastic material is more resistant to heat than the black variety and can handle temperatures of up to 200°F (93°C). Red PEX pipes are also often used for radiant floor heating systems.

Black PEX pipes, on the other hand, excel in cold water applications. They are certified for use in potable water systems and are commonly used for municipal water mains, residential and commercial water supply lines, and irrigation systems. While they can resist high temperatures, black PEX pipes become brittle when exposed to temperatures below freezing.

The physical differences between red and black PEX pipes are pronounced. The color is the most obvious difference, but the material itself is also quite different. Red PEX pipes are softer and more flexible, while black PEX pipes are stiffer and more rigid. This difference in composition also affects the way the two types of pipe are joined together: black PEX requires crimp rings while red PEX needs expansion sleeves.

Knowing the differences between red and black PEX pipes is essential when selecting the right material for the job. The color of the pipe is the first indication of its suitability for hot or cold water applications, but a closer comparison reveals the material properties that make each type an ideal candidate for different tasks.

Can I use oxygen barrier PEX for domestic water?

Yes, oxygen barrier PEX can be used for domestic water systems. Oxygen barrier PEX is a type of plastic tubing that is used mostly in residential and commercial radiant floor heating systems. It helps prevent corrosion to the pipes and other components in the system. The oxygen barrier keeps oxygen from getting into your plumbing system. This helps to protect the system from rusting, clogging, and other damage that can occur when oxygen comes into contact with metal components.

One of the main advantages of using oxygen barrier PEX for domestic water systems is that it is highly resistant to freezing temperatures. This means that it will not expand and crack like traditional metal pipes. It also helps to conserve energy, since oxygen barrier PEX does not allow heat to be lost through conduction. This makes it a great choice for homes located in cold climates.

Oxygen barrier PEX also has a long service life, making it a cost-effective option for homeowners. It is also easy to install and can be joined together with simple compression fittings. This makes it an ideal material for DIYers who want to save money on their plumbing installation.

When choosing oxygen barrier PEX for domestic water systems, there are a few things to consider. You should ensure that the tubing you purchase meets all water supply regulations and is certified for use in potable water systems. You should also make sure that the oxygen barriers are not expired or damaged. Additionally, you should check to make sure that your home has the right pressure rating for oxygen barrier PEX.

Overall, oxygen barrier PEX is a great option for domestic water systems. It is easy to install, highly resistant to freezing temperatures, and provides a long service life. Plus, it helps to conserve energy, making it a great choice for both cost savings and energy efficiency.

What does blue and red PEX mean?

PEX is short for cross-linked polyethylene, a plastic piping material that has been used for decades in plumbing and heating applications. PEX is available in two colors: blue and red. The color indicates the type of material used to make the pipe, not the type of pipe; both colors are suitable for both hot and cold water systems.

Blue PEX is made of polyethylene copolymer and is most commonly used for residential water supply lines. It is designed for indoor use only, since it is not UV resistant. Blue PEX is also known for its flexibility and ease of installation, making it an ideal choice for areas where tight bends or sharp turns are necessary.

Red PEX is manufactured from polyethylene resin with high levels of cross-linking. This makes it stronger and more durable than blue PEX, making it the preferred choice for commercial applications, such as radiant heating systems. Red PEX can also be used outdoors and is UV-resistant, but due to its higher cost and lack of flexibility, it is most often used in large, fixed pipe runs.

Overall, both blue and red PEX have distinct advantages and disadvantages that must be considered when choosing which color to use in a particular application. Ultimately, the decision comes down to the specific needs of each project and the individual preferences of the installer.

What is purple PEX for?

Purple PEX is a type of plumbing material specifically designed to be used in potable water applications. It is known for its durability and resistance to corrosion, which makes it ideal for use in homes or businesses that want to ensure their water supply is safe from contaminants. Purple PEX is made from high-density polyethylene (HDPE), which is a type of plastic that is particularly resistant to wear and tear. The material also has excellent flexibility, allowing for easy installation into existing plumbing systems. Additionally, since it is resistant to corrosion, it needs to be replaced less frequently than other types of plumbing material, saving you both time and money.

Purple PEX is suitable for a wide range of potable water applications, including hot and cold water lines, drainpipes, and tubing for various uses. It is commonly used in the installation of residential and commercial water supply systems, due to its strength and durability. In addition, purple PEX can easily be connected with other materials, such as copper, PVC, and CPVC, making it a versatile option for plumbing projects. If you are looking for an efficient, effective, and affordable way to improve your water supply system, purple PEX may be the right choice for you.

What is the orange PEX?

Orange PEX is a type of rigid plastic pipe that is used primarily for plumbing in residential applications. This unique type of pipe is available in sizes ranging from 1/4 inch to 3/4 inch, and it is a great choice for many different types of projects. Orange PEX pipes are made from cross-linked polyethylene (PEX) resin, and this special material makes them very strong and more durable than conventional PVC or CPVC piping. In addition, PEX pipes are easier to install and are more affordable than other types of plastic piping.

This unique material has several advantages over metal or PVC piping. For one, it is much more flexible than metal piping, which makes it easier to install. It also is less expensive than traditional piping materials, and it is resistant to corrosion, which can make it last even longer. Orange PEX also has excellent heat transfer properties, making it an ideal choice for hot water piping systems. Plus, because it is resistant to freezing temperatures, it can be used safely outdoors in cold climates.

Orange PEX pipe is also very easy to work with, meaning that it can be cut, bent, and connected without the need for special tools. Furthermore, it is also non-toxic, so it is safe to use in areas where food preparation or storage is involved. And with its bright orange color, it adds a bright and stylish look to any plumbing installation.

Overall, Orange PEX is a great and cost-effective choice for a variety of plumbing applications. Its numerous advantages make it a top choice for new construction, remodeling, and repairs in your home. Whether you’re installing a new hot water system or simply replacing old pipes, Orange PEX should be your go-to piping material.

What does PEX c look like?

PEX c is an incredibly versatile and durable plumbing material that is commonly used in a variety of residential and commercial applications. It is can be used for supplying water to fixtures, such as sinks and showers, as well as for running hot and cold water lines. PEX c has several advantages over traditional plumbing materials such as copper.

PEX c is composed of solid cross-linked polyethylene that is impervious to corrosion and oxidation. This makes it ideal for applications where piping may come in contact with acidic or alkaline waters. In addition, it’s flexible so it can easily be maneuvered around tight corners and other tight spots in piping systems. It is also resistant to extreme temperatures, allowing it to remain stable in both hot and cold climates.

Installing PEX c is relatively simple and requires fewer fittings than other materials such as copper. The material can take less time and effort to install which is great for those tackling DIY plumbing projects. PEX c is color coated so it’s easy to distinguish which line is for hot and cold water. It is also lightweight, which makes transporting and handling it much easier.

Overall, PEX c is a great product for those looking for high quality and efficient plumbing materials. Its flexibility and durability make it a cost effective choice for many homeowners and businesses alike.

What causes pinholes in PEX pipe?

Pinhole leaks in PEX pipes are relatively common, and can cause big problems if left unresolved. Unfortunately, these pinholes can be caused by a number of factors, from improper installation and poor water quality to chemical attacks and inadequate pressure relief.

If you notice pinholes in your PEX pipes, it’s important to address them as soon as possible to avoid further damage and costly repairs. Below, we’ll provide an overview of the most likely causes for pinholes in PEX pipes.

1. Poor water quality: If the water running through your pipes contains high levels of chlorine, this can cause pinholes as the chlorine attacks the O-rings used to connect the pipes. Additionally, if the water is acidic or contaminated with debris, this can also lead to pinholes.

2. Improper installation: If the PEX pipes have not been properly installed, this can lead to pinholes. The most common mistakes include using the wrong type of glue or connectors, failing to correctly “weep” the joints, not connecting the pipes securely, and failing to use appropriate pressure relief valves.

3. Inadequate pressure relief: Properly relieving pressure on PEX piping systems is essential to preventing pinholes. Overpressurisation of the system can cause the pipes to expand and rupture, leading to pinholes.

4. Chemical attack: Finally, certain chemicals can attack the plastic resin used to manufacture PEX pipes, causing pinholes and other damage. This is why it’s so important to check the compatibility of your piping system with the chemicals used in your home before installation.

By being aware of the potential causes of pinholes in PEX pipes, you can help ensure that your plumbing system is properly installed and maintained, preventing costly repairs down the road. If you do find pinholes in your PEX pipes, you should contact a professional plumber for advice to ensure the issue is corrected quickly and correctly.

Does PEX need air hammer?

PEX (cross-linked polyethylene) is a type of plumbing pipe that has become increasingly popular for both residential and commercial plumbing projects due to its strong, durable nature and flexibility. PEX pipe is easy to install but it does require special tools, including an air hammer. An air hammer is an impact tool that uses compressed air to force the PEX into place. The air hammer is used to drive the PEX pipe into fittings, compression sleeves and other types of connection that require a tight seal. Without the use of an air hammer, it would be difficult to get a tight seal on a PEX joint, which could lead to leaks in the plumbing system.

Using an air hammer to install PEX pipe is simple and straightforward. The air hammer attaches directly to the PEX pipe, and when compressed air is released, the air hammer drives the PEX into the fitting. This provides a secure and waterproof connection. It is important to note that the air pressure needs to be set correctly for the job, as too much pressure can damage the PEX pipe and cause it to deform or crack. It is also important not to overdrive the PEX pipe, as this can result in difficulty tightening connections or water leakage.

In conclusion, an air hammer is an essential tool for correctly and securely installing PEX pipe. It is relatively easy to use and should be used whenever installing PEX pipe to ensure a tight seal and prevent any water leakage.