What is the difference between PEX-A, PEX-B, and PEX-C?

PEX-A is the most flexible and can be expanded for connections. PEX-B is the most common and uses crimp or clamp fittings. PEX-C is the least flexible. All are suitable for residential water supply.

Can PEX be used for outdoor applications?

PEX cannot be exposed to UV light, so it should not be used outdoors unless sleeved in UV-protective material. Underground burial is permitted with proper protection.

PEX TubingGenerating image…

Plumbing

Pipe

$0.30-$1.50 per foot

PEX Tubing (2026)

Prepared by Lumberama's Building Materials Team

|Last updated May 15, 2026|Sources & methodology

PEX (cross-linked polyethylene) tubing has become the most popular water supply piping for residential construction and remodeling. Its flexibility allows it to snake through walls and floors with fewer fittings than rigid pipe. Color-coded red for hot, blue for cold, and white for either. Resistant to freezing, corrosion, and scale buildup.

Key Features

Flexible for easy routing
Freeze-resistant construction
Color-coded for hot and cold
Multiple connection methods
Fewer fittings than rigid pipe

Specifications

Diameters: 3/8

1/2

3/4

1 inch | Available Lengths: 10-foot sticks

100-foot and 300-foot coils | Temperature Rating: Up to 200F | Pressure Rating: 160 PSI at 73F | Colors: Red (hot)

blue (cold)

white (either)

Applications

Hot water supply
Cold water supply
Manifold distribution systems
Radiant floor heating
Ice maker and fixture connections

Installation Overview

Cut with a PEX cutter for clean, square cuts. Connect using crimp rings, cinch clamps, or push-fit fittings depending on your chosen system. Support tubing per code requirements. PEX can be bent around corners using support bends.

Pros & Cons

Pros

✓ Flexible and easy to install
✓ Freeze-resistant
✓ Fewer fittings needed
✓ Less expensive than copper

Cons

✗ Cannot be exposed to UV light
✗ Not recyclable
✗ Rodents may chew through it
✗ Some connection methods require special tools

Top Brands

SharkBite

Code Requirements

Must meet ASTM F876/F877. Cannot be exposed to UV light or direct sunlight. Must be properly supported. Connection methods must be approved for the specific PEX type (A, B, or C).

Buying Tips

Buy coils for long runs and sticks for short connections. Red for hot, blue for cold makes identification easy. Choose your connection method first, then buy the compatible fittings and tools.