If you’re looking into repiping your home, chances are you’ve come across PEX piping. It’s become one of the most popular plumbing materials out there—and for good reason. But with multiple types available, like PEX-A, PEX-B, and PEX-C, it’s easy to get overwhelmed.

Let’s break it down in plain terms so you can make the right choice for your home and your budget.

What Are the Main Types of PEX Piping?

There are three main types of PEX: A, B, and C. While all of them are forms of cross-linked polyethylene, they’re made using different processes, and that affects how they perform.

PEX-A (Type A PEX Tubing)

This is the most flexible option available. If your home has tight spaces or lots of turns in the plumbing, PEX-A can be a lifesaver. It’s also known for its ability to expand, which makes it resistant to freezing and bursting.

Because of its flexibility, it requires fewer fittings, which means fewer potential leak points. But all that performance comes at a cost—PEX-A is the most expensive of the three.

PEX-B (Type B PEX Tubing)

PEX-B is a bit stiffer, so it’s not quite as easy to work with in tight areas. It doesn’t expand as much as PEX-A, so it’s more vulnerable to freezing if installed in exposed areas.

That said, it’s still a solid option, especially for straight runs or new construction. It’s also more budget-friendly than PEX-A, making it a common choice for large-scale residential projects.

PEX-C

PEX-C is made using a completely different method and tends to be the least flexible and most prone to kinking. It’s still used in some projects—mainly for radiant heating or quick DIY jobs—but it’s not typically the first choice for a full repipe.

So, how many types of PEX are there? Technically, three. But in most repipe jobs, it really comes down to PEX-A vs. PEX-B.

Are All Types of PEX Approved for Drinking Water?

Yes—all major types of PEX are rated for potable water use as long as they meet U.S. plumbing standards (NSF/ANSI 61). Whether it’s PEX-A, B, or C, they’re safe to install for your drinking water supply.

That said, quality varies by brand and manufacturing. If you’re working with a professional plumber, they’ll likely stick with trusted PEX pipe manufacturers in the USA like Uponor or Viega to ensure your system is reliable long-term.

Can You Use Different Types of PEX Tubing Together?

Technically? Yes. But it’s not something most pros recommend.

Each PEX pipe type uses different fittings and tools, and combining them increases the chance of leaks or performance issues down the road. If you’re going to do a full-home repipe, your best bet is to stick with one PEX type throughout the system.

Which Type of PEX Tubing Is Best for Residential Plumbing?

If you’re asking around or reading online, you’ll probably hear that PEX-A is the best option—and for most homes, that’s true.

Here’s why plumbers like it:

• It’s super flexible, which makes it easier to install around corners or tight spots
• It’s the only PEX pipe that can expand and return to shape—great for cold climates
• It requires fewer fittings, which reduces the chance of leaks
• It’s compatible with expansion fittings, which have a strong, secure seal

But PEX-B is no slouch either. If you’re working with a tighter budget or the layout of your home doesn’t require a lot of bends, PEX-B can be a cost-effective solution.

Get a Quote for Your Home PEX Repipe

Whether you’re looking to replace galvanized pipes, upgrade aging copper lines, or simply want peace of mind with a new system, choosing the right PEX tubing is a key part of the process.

We’ve helped hundreds of homeowners with repipe projects using both PEX-A and PEX-B, and we’re happy to walk you through what makes the most sense for your home. Just tell us a bit about your property, and we’ll give you a fair quote—no pressure, no guesswork.

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