Unveiling the Secrets: How PEX Pipe Measurement Defies the Norm

PEX (cross-linked polyethylene) pipe has become increasingly popular in plumbing applications due to its flexibility, durability, and corrosion resistance. However, understanding how PEX pipe is measured is crucial for accurate sizing and installation. This blog post will delve into the various methods used to measure PEX pipe, providing you with the knowledge to make informed decisions about your plumbing projects.

Measuring PEX Pipe Diameter

The diameter of PEX pipe is typically measured in inches or millimeters. The most common sizes for residential plumbing range from 1/2 inch to 1 inch in diameter. To measure the diameter, use a tape measure or a caliper. Wrap the tape measure or caliper around the outside of the pipe and record the measurement in the center of the pipe.

Measuring PEX Pipe Length

Measuring the length of PEX pipe is straightforward. Use a tape measure or a measuring wheel to determine the distance between the two ends of the pipe. Ensure the tape measure or measuring wheel is held taut to get an accurate measurement.

Measuring PEX Pipe Thickness

The thickness of PEX pipe is measured in inches or millimeters. It represents the wall thickness of the pipe. To measure the thickness, use a micrometer or a caliper. Place the micrometer or caliper on the outside of the pipe and measure the distance between the jaws.

Measuring PEX Pipe SDR

SDR (Standard Dimension Ratio) is a measure of the pipe’s strength and thickness relative to its diameter. A lower SDR indicates a thicker pipe. To calculate the SDR, divide the outside diameter of the pipe by the wall thickness. For example, a 1-inch PEX pipe with a wall thickness of 0.125 inches has an SDR of 8.

Measuring PEX Pipe PSI Rating

The PSI rating of PEX pipe indicates its maximum pressure capacity. It is typically expressed in pounds per square inch (psi). The PSI rating is determined by the material composition, wall thickness, and SDR of the pipe. To determine the PSI rating, refer to the manufacturer’s specifications.

Measuring PEX Pipe Coils

PEX pipe is often sold in coils. The length of a coil is typically measured in feet. To measure the length of a coil, unroll the pipe and measure the distance from the inside end to the outside end.

Measuring PEX Pipe Fittings

PEX pipe fittings are measured by their size and type. The size of a fitting refers to the diameter of the pipe it fits. The type of fitting determines its function, such as elbows, tees, or couplings.

Summary

Understanding how PEX pipe is measured is essential for proper sizing and installation. By following the methods described above, you can accurately determine the diameter, length, thickness, SDR, PSI rating, and coil length of PEX pipe. This knowledge will empower you to make informed decisions about your plumbing projects and ensure the proper functioning of your PEX pipe system.

What You Need to Learn

Q: What is the most common size of PEX pipe for residential plumbing?
A: 1/2 inch to 1 inch in diameter.

Q: How do I measure the thickness of PEX pipe without a micrometer or caliper?
A: You can use a ruler or a coin. Measure the distance across the pipe and divide it by two.

Q: What is the difference between SDR and PSI rating?
A: SDR measures the pipe’s strength relative to its diameter, while PSI rating indicates its maximum pressure capacity.

Q: How long does a coil of PEX pipe typically last?
A: The lifespan of a PEX pipe coil depends on factors such as the material composition, SDR, and installation conditions. However, it can last for several decades with proper installation and maintenance.

Q: Can I cut PEX pipe with a hacksaw?
A: Yes, you can cut PEX pipe with a hacksaw. However, it’s recommended to use a PEX cutter for a cleaner and more precise cut.