PVC Pipe Sizes: A Guide To Sizes and Dimensions (2024)

Depending on the project at hand, you may need to buy new PVC pipes. PVC pipes vary in size and are broken down into three main categories: schedule 40, schedule 80, and schedule 120. To avoid misuse, plumbing malfunctions, or pushing back a piping project, it’s helpful to do your research and find the right product fit. It could save you and your team time and money from reordering materials or fixing future pipe issues.

PVC pipes are measured on a nominal system. This means all measurements are based on the types of structures versus specific measurements. For instance, 0.84 inches measured from one pipe's end to another is classified as a one-inch pipe. There are also different uses for each type of pipe schedule. Keep reading to understand each PVC pipe's size and uses for your next job.

Pipe measurements are calculated on a nominal scale. This means their measurements reference structures at hand over true scale measurements. To help translate the correct size of pipes you need, we included a helpful guide above.

Here’s a step-by-step guide to using the chart:

1. Place your pipe on a hard surface and face one end towards you.
2. Grab a tape measure or ruler to measure your pipe’s right outer edge to its left outer edge. Keep your ruler as level as possible while measuring.
3. Now, pair “Your Measurement” with the “Average OD” referencing the chart above.
4. Pick out your pipes based on the Average OD your measurement paired with.

Keep in mind, these measurements refer to the outer edge of the pipe, not the inner. Depending on the schedule of pipe you need, your inner measurements may fluctuate.

Schedule 40 pipes are typically white or silver but can be found in other colors. These pipes are thinner than schedule 80s and 120s. This allows fluids to pass through faster than other pipe schedules. This style upholds great pressure, even for cold water systems. In hot temperatures, all three schedules are able to withstand up to 140 degrees.

Schedule 40 pipes are commonly used for drainage around buildings and for gas and water lines. The pressure rating for this pipe schedule is 120 to 810 pounds per second inch (PSI). As a result, schedule 40 pipes are commonly used for potable water systems, golf course construction, or pools and spas.

Schedule 80 pipes are thicker than schedule 40 pipes, but still not the thickest. These pipes are usually dark gray in color but may vary. Schedule 80 PVC pipes are built thicker and stronger than schedule 40s, and can handle higher pressures with a rating of 210 to 1230 PSI. They’re often used for chemical processing, industrial plating, deionized water lines, and wastewater treatment management.

Keep in mind, the thicker the pipe does not equal pipe security. Depending on the solutions you’d be transporting and the flow rate you’d like, mishaps can happen if you don’t choose the correct size and fit. For instance, if you use a heavy pipe for general solution purposes, your flow could be slower than needed.

Schedule 120 pipes are one of the thickest pipes on the market. With their density, they’re routinely used for non-corrosive or general corrosive projects with less reactive ingredients. Automotive and construction establishments frequently use these materials for maximum durability. Schedule 120’s pipe thickness helps slow down mild to high-pressure systems with a rating of 380 to 1,010 PSI.

Depending on the construction site you’re working on, contact your state for building code regulations. To avoid miscommunication, ensure you find out pipe schedules needed to properly meet local requirements.

Once you have your pipe sizes figured out, you’ll be able to move onto the next step: ordering pipe values. To help control your pipe flow, figure out which size valves you may need. When you’re ready to install your pipes and valves, be sure to reference our guide. As your team needs more materials or installation information, be sure to reference Zoro’s site for expert tips, tricks, and product needs.

Sources: Hunker