Difference Between PEX and PB Piping

When it comes to plumbing, there are various types of piping available. Each type has its own unique advantages and disadvantages. Two of the most popular materials used for plumbing are PEX (cross-linked polyethylene) and PB (polybutylene).

Polybutylene (PB) and cross-linked polyethylene (PEX) are two types of flexible plastic piping that are used for water supply lines in plumbing systems. Both PB and PEX pipes are made from high-density polyethylene (HDPE), but the two types of piping have different manufacturing processes.

PB piping is made by extrusion, a process in which molten plastic is forced through a die to create the desired shape. The extruded PB pipe is then cooled and cut to length. PEX piping is made using a process called cross-linking, in which bonds are formed between the atoms of the HDPE molecules to create a stronger, more resilient material. Cross-linking can be done using either chemical or radiation methods.

So, while both PB and PEX pipes are made from HDPE, the manufacturing process for PEX results in a pipe that is stronger and more resistant to heat and chemicals than PB pipe.

Read this article to find out more about PEX and PB Piping and how they are different from each other.

What is PEX?

PEX piping is made of high-density polyethylene (HDPE) and cross-linked polyethylene (PEX). HDPE is a strong, durable material that is resistant to punctures, UV light, and chemicals. PEX, on the other hand, is a softer material that is more flexible and easier to work with. PEX piping is also less likely to leak than HDPE piping.

PEX is a newer type of pipe that is far more durable and resistant to leaks. That's why more and more homeowners are making the switch from Poly B to PEX piping. PEX is the better choice due to its flexibility and resistance to freezing.

PEX piping is also more flexible than Poly B, which makes it easier to install in tight spaces. Additionally, PEX is less likely to freeze and burst in cold weather climates, making it a better choice for homes in colder regions.

What is PB Piping?

PB piping is made of polybutylene (PB), a type of plastic that was once widely used in plumbing applications. However, PB piping has fallen out of favor in recent years due to its tendency to leak. PB piping is also more difficult to work with than PEX piping.

Poly B is a type of plastic piping that was commonly used in homes built between 1978 and 1995. Unfortunately, Poly B has a tendency to break down over time, which can lead to costly leaks and repairs.

If you're thinking about upgrading your home's piping, there are a few things to keep in mind. First, it's important to hire a qualified contractor who has experience working with both Poly B and PEX pipes. Second, be sure to get multiple quotes before making a final decision - this will help ensure that you get the best possible price for your new piping.

Poly B piping is a type of plastic piping that is used in homes and buildings for the conveyance of hot and cold water. It is made of polybutylene, a synthetic resin that is derived from petroleum. Poly B piping was introduced in the 1970s as an alternative to copper piping. It was touted as being lighter and cheaper than copper, and easier to install.

One of the main advantages of Poly B over PEX is its price. Poly B piping is typically much cheaper than PEX piping, making it an attractive option for budget-conscious homeowners. However, some experts believe that the long-term costs of Poly B may actually be higher than PEX, as it is more likely to develop leaks over time.

Difference between PEX and PB Piping

The following table highlights the major differences between PEX and PB Piping −

Characteristics	PEX	PB Piping
Formation	The formation of PEX Piping is done by using the cross-linking process	The formation of PB Piping is done by using the polymerization of Butane
Pressure	It has the high tolerance to pressure	It has the low tolerance to pressure
Resistance of Chlorine	It is more resistant	It is less resistant
Tolerance of Temperature	PEX is higher tolerance to temperature	PB Piping is lower tolerance to temperature
Durable	More durable	Less durable compared to PEX
Environmental Friendly	It is more environmentally friendly	It is less environmentally friendly compared to PEX

How is the Transition from polybutylene to PEX made?

If you're considering replacing your home's old polybutylene (PB) piping with cross-linked polyethylene (PEX), there are a few things you need to know. Here's a quick rundown of how to transition from PB to PEX −

• Check your local building codes. Some jurisdictions have specific requirements for transitioning from one type of piping to another, so it's important to check with your local building department before starting any work.

• Cut the PB pipe cleanly. You'll need to use a saw or other cutting tool to remove the old PB pipe. Make sure to cut the pipe as straight as possible so that the new PEX pipe will fit properly in its place.

• Remove any adhesive from the inside of the PB pipe. If there is any residual adhesive inside the pipe, use a wire brush or similar tool to remove it completely. This will ensure that the new PEX pipe adheres properly to the surface.

• Install transition fittings (if necessary). In some cases, you may need to install special transition fittings in order to connect the new PEX piping to the existing PB piping. These fittings can be found at most hardware stores or online retailers specializing in plumbing supplies.

• Connect the PEX pipe and secure it in place. Once you have all of your materials ready, it's time to connect the new PEX pipe to the old PB piping system.

Can PEX rings be used on Poly-B?

Poly-B, or polybutylene, is a type of plastic piping that was commonly used in home plumbing systems from the 1970s to the 1990s. PEX, or cross-linked polyethylene, is a newer type of plastic piping that has become popular in recent years. While PEX is compatible with many types of fittings and connectors, it is not compatible with PEX rings.

Conclusion

Compared to PB, PEX can withstand temperatures that are significantly higher and lower. While PB lacks cross-linking, PEX does. Compared to PB, PEX can withstand substantially higher pressures. Compared to PB, PEX is more chlorine-resistant. In contrast to PEX, PB is no longer accepted in the US and Canada.