Daniel Edelman

What Is PEX Plumbing?

Copper and galvanized steel have long been used in traditional plumbing systems. Though reliable, they’re not without drawbacks—prone to corrosion, rust and scale buildup, leading to potential leaks, clogs, and decreased flow to water supply lines.

Here’s where PEX piping comes in. This flexible, plastic-based material offers a host of advantages over its metal predecessors, making it a popular choice for both residential and commercial plumbing projects. In this article, we’ll explore what is PEX plumbing and why it's the perfect partner for every type of pipe fitting in your plumbing.

What Are PEX Pipes?

PEX, short for cross-linked polyethylene, is a flexible plastic piping material used as an alternative to traditional copper and galvanized steel pipes. Unlike its metal predecessors, PEX pipe plumbing is resistant to corrosion, scale buildup, and freezing, making it a durable and reliable choice for indoor and outdoor plumbing systems.

PEX Pipes Versus Metal Pipes

A key advantage of plumbing with PEX compared to metal piping is its flexibility. This makes for easier installation, especially in tight spaces and around corners.

PEX pipes are lightweight, making them simpler to handle and transport compared to heavy metal pipes. Additionally, PEX is generally more cost-effective than copper or galvanized steel, making it an attractive option for homeowners and contractors.

Image source: Canva

Types of PEX Piping

PEX pipe plumbing comes in three primary varieties: PEX-A, PEX-B, and PEX-C. Each type possesses distinct properties and is suitable for different applications.

PEX-A (Cross-Linked Polyethylene—Peroxide)

Renowned for its exceptional flexibility and resistance to memory, PEX-A allows for effortless installation and expansion fittings. While it offers superior performance, plumbing with PEX A is the most expensive option.

PEX-B (Cross-Linked Polyethylene—Silane)

PEX-B is the most commonly used PEX type in North America. Balancing flexibility and durability, it's a versatile option for different plumbing needs. It’s also known for excellent chlorine resistance and compatibility with a wide range of fitting systems.

PEX-C (Cross-Linked Polyethylene—Irradiation)

Of the three PEX types, PEX-C is the least flexible and has a higher risk of cracking under freezing conditions. However, it's the cheapest and is highly chlorine-resistant. PEX-C is commonly used for public water supplies and radiant floor heating. When choosing PEX for your project, factor in flexibility needs, budget, and specific use.

Image source: Canva

Advantages of PEX Plumbing

Plumbing with PEX offers numerous advantages over traditional plumbing materials like copper and galvanized steel.

Flexibility and Ease of Installation

PEX tubes’ flexibility makes it easy to install in tight spaces and around corners. PEX tubing only needs a PEX crimping tool, stainless steel clamps, and copper crimping rings to connect to fittings.

Additionally, a PEX pipe is lightweight—it's easy to handle and transport, making PEX pipe plumbing a convenient and efficient plumbing option.

Corrosion Resistance and Longevity

PEX pipes outlast other materials due to their resistance to corrosion, scale, and mineral deposits. This results in fewer leaks, clogs, and maintenance problems.

Freeze-resistant

PEX piping is ideal for cold climates as it resists low temperatures well. It expands and contracts, reducing the risk of bursting. Use approved expansion or crimp connections and avoid kinking the pipe during installation.

Disadvantages of PEX Plumbing

There are many benefits to plumbing with PEX, but there are downsides as well.

Fitting Compatibility

While PEX compression fittings have become widely available, there might be limitations when you connect PEX pipe plumbing to older plumbing systems or specific fixtures. Carefully plan and consider PEX fittings before using.

Safety and Durability Concerns

Although working with PEX piping is generally considered safe, concerns about oxygen diffusion and long-term durability have been raised. While these concerns are often mitigated by proper installation and maintenance, it's important to be aware of them.

Image source: Canva

Your Trusted Partner for PEX Plumbing Supplies

NYDirect is your reliable partner for plumbing supplies, including all you need for long-lasting PEX pipe plumbing. Explore our top-notch PEX pipes, fittings, and tools for project success. From beginners to experienced plumbers, NYDirect provides the resources and support you need—and exclusive discounts to Pro Members too.

Get wholesale pricing, fast shipping, and a wide product selection at NYDirect for your convenience. Explore our extensive selection and discover the difference quality plumbing supplies can make in your home.