Brrr-illiant solution: pex pipe defies the cold, keeping your home toasty warm

PEX (cross-linked polyethylene) pipe has become increasingly popular in plumbing systems due to its durability, flexibility, and corrosion resistance. However, one question that often arises is: “Is PEX pipe resistant to freezing?” In this comprehensive blog post, we will explore the freezing properties of PEX pipe and provide practical guidance on protecting your plumbing system from freezing damage.

Can PEX Pipe Freeze?

Yes, PEX pipe can freeze if exposed to extreme cold temperatures for an extended period. However, unlike traditional copper or PVC pipes, PEX pipe has unique properties that make it more resistant to freezing damage.

How Does PEX Pipe Resist Freezing?

PEX pipe is made from cross-linked polyethylene, which gives it an elastic and flexible structure. When frozen, the water inside the pipe expands, causing the pipe to bulge. However, due to the flexibility of PEX pipe, it can accommodate this expansion without bursting or cracking.

Advantages of PEX Pipe in Freezing Conditions

Compared to traditional pipes, PEX pipe offers several advantages in freezing conditions:

• Flexibility: PEX pipe can expand and contract without breaking, reducing the risk of burst pipes.
• Memory: PEX pipe “remembers” its original shape, allowing it to return to its normal size after thawing.
• Resistance to Cracking: Unlike brittle pipes, PEX pipe is less likely to crack or split when frozen.

Protecting PEX Pipe from Freezing

While PEX pipe is resistant to freezing, it’s still important to take precautions to protect your plumbing system from freezing damage. Here are some recommended measures:

• Insulate Pipes: Insulate exposed PEX pipes in unheated areas, such as crawl spaces, attics, and exterior walls.
• Drain Outdoor Faucets: Disconnect and drain outdoor faucets before freezing temperatures arrive.
• Open Cabinets: Keep cabinet doors open in areas where pipes are located to allow warm air to circulate.
• Consider Heat Trace: Install heat trace cables along pipes in particularly cold areas to prevent freezing.

Thawing Frozen PEX Pipe

If your PEX pipes freeze, do not attempt to thaw them with an open flame or heat gun. This can damage the pipe and cause leaks. Instead, use the following methods:

• Warm Water Bath: Submerge the frozen section of pipe in a warm water bath.
• Heat Tape: Wrap the frozen pipe with heat tape and plug it into an outlet.
• Hair Dryer: Use a hair dryer on a low setting to gently warm the pipe.

Summary: PEX Pipe – A Resilient Choice for Freezing Conditions

PEX pipe is a highly versatile and freeze-resistant piping material that offers significant advantages over traditional pipes in cold climates. By understanding the freezing properties of PEX pipe and implementing proper protection measures, you can ensure that your plumbing system remains safe and functional even during the coldest winter months.

Answers to Your Most Common Questions

1. Can PEX pipe burst if it freezes?

PEX pipe is less likely to burst when frozen compared to traditional pipes due to its flexibility and ability to expand.

2. What is the temperature at which PEX pipe freezes?

PEX pipe typically freezes at temperatures below 20°F (-7°C).

3. How long can PEX pipe stay frozen without damage?

The duration of time that PEX pipe can remain frozen without damage depends on the temperature, the thickness of the pipe, and the duration of the freeze.

4. Can I use PEX pipe for outdoor applications in cold climates?

Yes, PEX pipe can be used outdoors in cold climates if properly insulated and protected from freezing.

5. What type of insulation should I use for PEX pipe?

Closed-cell foam insulation is recommended for insulating PEX pipe in cold climates.