How to Choose the Right Plumbing Pipe for Your Project

There are many different types of pipes for plumbing systems in homes and commercial buildings. Whether you need to measure a pipe’s outside diameter or inside opening, the right measurement is critical for a smooth installation and to avoid costly repairs.

First, find the pipe’s circumference by wrapping a string around it and marking where it overlaps. Then, use a ruler or caliper to measure the distance from one mark to another, excluding the thickness of the pipe walls.

Length

It can be tricky to figure out how much pipe you need for a project. There are a lot of different measurements involved, including outside and inside diameters. You have to know how to convert between these and use a chart to find the nominal size for the type of pipe you need in the store.

Many plastic pipes have the size information printed on the side of the pipe, but this isn’t always possible. You can also determine the size of a pipe by measuring the circumference with a flexible tape measure or even a string and then using a ruler to find the diameter. Look at more info to discover a full article about debouchage.

Once you have the measurement, you can calculate the nominal pipe size by dividing the circumference by pi (3.1415). You can then refer to a pipe sizing chart for the appropriate diameter to buy for your project. It might seem complicated, but it’s really just some basic math.

Diameter

You can measure the diameter of a pipe using a pair of calipers. If you have access to an open end, a ruler or tape measure can also work. The important thing is to measure the outside diameter – that's the width across the pipe hole, excluding the thickness of the walls. Then, compare that measurement to the Nominal Pipe Size chart for your particular type of pipe.

You can find the chart by searching online for your particular type of pipe. If you're working with a pipe that has male threads, for instance, you'll need to use a different chart than for a smooth pipe. You can also check the pipe itself. Many pipes, especially PVC, are labeled with their type and Nominal Pipe Size (NPS). If you're lucky, the size will be written right on the pipe. That's the easiest way to know what size to buy for your next project. If not, you can calculate it using this easy equation:

Threads

The threads at the ends of pipes and fittings are very important, as they allow them to fit together. Threads also function to provide a seal and are important for preventing leaks from the connection points. There are several different types of pipe threads, including straight and tapered. Understanding the difference between these and how to measure them can help you make sure you have the right pipe for your project.

To measure a pipe thread, you need to use a caliper and a pitch gauge. The caliper will give you the diameter of the thread's exterior, and the pitch gauge will tell you how many crests there are per inch. Once you have this information, you can find the correct pipe thread standard for your project by referring to a chart.

The first thing to determine is whether the threads are male or female. You can do this by measuring the outer diameter of one of the threads and comparing it to a chart.

Material

The pipe material you choose depends on your plumbing system’s needs. For example, you will want to select a pipe that is corrosion resistant and can withstand high water pressure. Similarly, you will want to choose a pipe that is suitable for your environment and soil composition.

There are several factors to consider when choosing a pipe’s material, including the following:

Your location’s water type: Certain types of water are corrosive and dissolve plumbing fittings and fixtures. Your exposure to sunlight: The sun’s UV rays can degrade plastic pipes over time.

The type of pipe you choose also affects its length. If your pipe has no threads, you will measure its outside diameter (OD). If it has female threads, you will measure its inside diameter (ID). Once you know these two measurements, you can determine the pipe’s length. You can use a tape measure or a ruler to get these measurements. Then, you can use the chart below to convert the OD and ID measurements into the appropriate lengths for your pipe.