PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (2023)

PVC pipe is something you've heard of. It is a white plastic pipe commonly used for drainage and plumbing. Polyvinyl chloride has become a popular metal alternative, which is not surprising given its many uses. It is one of the most popular plastics worldwide due to its strength and durability. It's also great in terms of its ease of installation and low cost, which is why it's so common in plumbing. They are thermoplastic materials that can be molded into various shapes to make tubes and fittings. It is also excellent for valves and other liquid handling equipment.

The nominal system is used to measure the component. This means that more than specific measures, all measures depend on the types of structures. A one-inch line is defined as 0.84 inches measured from end to end. Each form of pipeline programming has its own set of applications. Suppose you are interested in learning more about yourdimensionsand size chart. I suggest you read on to learn more about them for your next project.

Below you can easily find the required PVC pipe size tables in mm and inches.

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (1)

Here's everything you need to know about PVC pipe sizes and charts, including dimensions and more! Let's delve into PVC pipe schedules.

table of contents

  • starting
  • What is PVC pipe?
  • What is this for?
  • What are your benefits?
  • How are they made?
  • PVC pipe dimension table Schedule 10
  • PVC pipe dimensions table Schedule 20
  • Schedule 40
  • Schedule 80
  • Schedule 120
  • Program 40 vs. 80
  • PVC, CPVC and UPVC
  • How to measure PVC pipe (4 step guide)
  • What is DO?
  • what to consider
  • frequently asked questions


At the end of the 19th century, polyvinyl chloride was discovered. The newly generated chemicalgas,vinylchloride exposed to sunlight. Scientists observed that it underwent a chemical reaction that resulted in a whitish solid substance. This substance is now called polymerization. To understand this substance, I recommend that you continue reading below:

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (2)

What is PVC pipe?

This is one of the most widespread and adaptable.types of plastic pipes. It has been in use for over 80 years, serving a variety of applications in various market sectors around the world. These are incredibly strong and durable with excellent corrosion resistance. They have little risk of succumbing to the thermal expansion or contraction thatmetalpipeline. These tubes are affordable and durable, come in a variety of sizes with various accessories. Regardless of the type of PVC variant, you can use them for both hot and cold water applications.

What is this for?

They are widely applied by plumbers in construction.Sewerageand water network. They are also used for irrigation systems. Because they are easy to install and lightweight, they are economical and environmentally friendly. They are also strong and durable, with the added bonus of being easily recyclable. This component has a smooth surface. Helps water flow faster due to reduced friction than tubes constructed with other materials such ascast ironor concrete. You can have them in various lengths and wall thicknesses. They also come in multiple diameters to meet international size requirements such as DIN 8061 and ASTM F441. ASTM D1785 is another standard you should be aware of.

PVC is used for a variety of items and categories, including:

  • butterfly valves
  • Ball check valves
  • Retention valve
  • diaphragm valves
  • PVC dowels
  • PVC unions (including CPVC)
  • and pvc
  • Couplings

What are your benefits?

  • They are the main means of transporting water andelectricityin many industries. The main reasons for its extensive use are its extreme tolerance to heat and corrosion.
  • Compared to concrete and metal, the flat surface of drills has little friction with moving fluids. As a result, it is a common material for water supply pipes.
  • It is light and small, making it perfect for laying pipes over long distances. This reduces the fuel needed to transport them, making them more environmentally friendly.
  • It is cost effective as it has excellent mass production using a relatively simple method.
  • It is easy to mold into various shapes and sizes, making it an excellent material with a wide range of uses.
  • It is challenging and durable and can withstand a lot of pressure. As a result, it is a good choice for underground pipelines and lines that must transport pressurized fluids.
  • Its chemical inertness or resistance to chemical interactions with other compounds is a valuable chemical characteristic. This protects and transports drinking liquids used for household purposes safely.
  • When they are placed underground, they can last for a hundred years. This makes it a preferred, low-maintenance material for large piping networks. Historic substances such as steel and iron would have extremely high maintenance and overhaul costs.
  • Installing and maintaining them is simple. Compared with traditional materials, its failure or breakage rate is extremely low.
  • It is low in carbon, resulting in fewer hazardous emissions during production. They are easy to recycle and reuse for different applications. Whether it's for the recovery and reuse of waste from buildings or for the recycling of industrial waste, it doesn't matter. 8,000 tons are recycled every year across Europe through the Vinyl Plus programme.

How are they made?

These tubes are manufactured by extruding polyvinyl chloride as a raw material. They generally follow the same procedures as standard tube extrusion operations:

  1. Direct materials granules/powder supply PVC twin screw extruder.
  2. Many extrusion zones are melting and heating up.
  3. Cure the material through a die to form a tube.
  4. The molded tube is cooled.
  5. Finally, workers ormachine cutin the desired lengths.

Despite having a manufacturing process similar to most plastic pipes, they have inherent properties. They present significant production and commercial placement hurdles for tube manufacturers.

PVC pipe dimension table Schedule 10

Nominal Size [inches]Outside diameter [mm]Outer Diameter [inch]Wall thickness [mm]Wall Thickness [inches]Weight [kg/m]Peso [lb/ft]
1/8″ NPS610.30,411.240,0490,280,19
1/4″ NPS813.70,541,650,0650,490,33
3/8″ NPS1017.10,681,650,0650,630,42
1/2″ NPS1521.30,842.110,08310,67
3/4″ NPS2026,71.052.110,0831.280,86
1 1/4″ NPS3242.21,662.770,1092.71.81
1 1/2″ NPS4048.31.92.770,1093.112.09
2″ NPS5060,32.3752.770,1093,932.64
2 1/2″ NPS65732.8753.050,125.263.53
3″ NPS8088,93.53.050,126.454.33
3 1/2″ NPS90101.643.050,127.44,97
26″ NPS650660267,920,312127,3685,6

PVC pipe dimensions table Schedule 20

They have the lowest resistance and are often used by customers in gravity fed systems.septic systemsand drainage. They are also used for stormwater projects. Its wall is significantly lighter than Schedule 40. You should only use it in situations where there is no traffic or other machines traversing the region. The outside diameter is the same as the SDR 35 and all Schedule 20 and SDR 35 fittings are interchangeable.

Here is the proper schedule 20 PVC pipe dimensions chart you need.

Nominal Size [inches]Outside diameter [mm]Outer Diameter [inch]Wall thickness [mm]Wall Thickness [inches]Weight [kg/m]Peso [lb/ft]
26″ NPS6506602612.70,5202.72136,17

Schedule 40

Low pressure water flow and drainage applications require Schedule 40. They can absorb temperatures up to 140 degrees Fahrenheit, while tube lengths are available in 10 inch and 20 inch portions. Schedule 40 comes with a flat or flared end and requires no installation.

Here is the appropriate chart.

Nominal Size [inches]Outside diameter [mm]Outer Diameter [inch]Wall thickness [mm]Wall Thickness [inches]Weight [kg/m]Peso [lb/ft]
1/8″ NPS610.30,411,730,0680,370,24
1/4″ NPS813.70,542.240,0880,630,42
3/8″ NPS1017.10,682.310,0910,840,57
1/2″ NPS1521.30,842.770,1091.270,85
3/4″ NPS2026,71.052.870,1131,691.13
1 1/4″ NPS3242.21,663.560,143.392.27
1 1/2″ NPS4048.31.93,680,1454.052.72
2″ NPS5060,32.3753.910,1545.443,65
2 1/2″ NPS65732.8755.160,2038.635,79
3″ NPS8088,93.55.490,21611.297.58
3 1/2″ NPS90101.645.740,22613.579.11

Time 20 vs. Annex 40 PVC: Main differences

The main difference is in the thickness. The thickness of the 20 program is enough to withstand a few years. The thickness is much less than Schedule 40 and it deforms easily. Try to crush it with your hand and you will succeed to some extent. This means that it will not last a lifetime. However, with Schedule 40, you can install it in your home and forget about it. Coming generations won't need to replace it as it's super thick.

Also, you will normally find that the schedule 40 tubes are white, while the schedule 20 is black.

What is Schedule 20 PVC pipe used for?

These tubes provide good corrosion resistance and are perfect for plumbing and drainage systems. You can also install them in dust collection systems or vacuums in a plumbing house.

Schedule 20 PVC pipe pressure rating

Schedule 20 tubing is rated up to 200 psi. That's more than you need for a tank in a residential or commercial space. It can easily be used to carry water from the well to the house or from the mains to the house. The pressure rating tells us the maximum amount of pressure a pipe can withstand at a given temperature under normal conditions.

Where do you buy schedule 20 PVC pipe?

You can easily find them at your nearest Home Depot. But it's getting harder to find as it no longer meets building code requirements. But if you need it for other projects, go to Mcdonnell Hardware and Feed. If you're lucky, you might find some online too.

Thin Wall PVC Pipe Dimensions

If you're looking for particularly thin walls, the Schedule 30 might be what you're looking for. They are ideal for drainage applications where lightweight, non-toxic piping is required. You can also opt for the classic 1" thin wall PVC.

Schedule 80

This is the maximum strength level. You can find them in parking lots and other high-traffic places. Typically used on pumping stations when you need a little more strength than Schedule 40 PVC. Since it has a similar outside diameter to Schedule 40 PVC, you can use it with all Schedule 80 and 40 fittings.

Here is the appropriate chart.

Nominal Size [inches]Outside diameter [mm]Outer Diameter [inch]Wall thickness [mm]Wall Thickness [inches]Weight [kg/m]Peso [lb/ft]
1/8″ NPS610.30,412.410,0950,470,31
1/4″ NPS813.70,543.020,1190,80,54
3/8″ NPS1017.10,683.20,1261.10,74
1/2″ NPS1521.30,843,730,1471.621.09
3/4″ NPS2026,71.053.910,1542.21.47
1 1/4″ NPS3242.21,664,850,1914.473
1 1/2″ NPS4048.31.95.080,25.413.63
2″ NPS5060,32.3755.540,2187.485.02
2 1/2″ NPS65732.8757.010,27611.417.66
3″ NPS8088,93.57.620,315.2710.25
3 1/2″ NPS90101.648.080,31818.6312.5

Schedule 120

Its outer diameter can be up to 24 inches. Tubes in this category have wall thicknesses ranging from 11.13 mm to 46.02 mm. Different grades of carbon steel have different pressure capabilities for the sametube size. Many use them in applications ranging from low to high pressure. In most industries, workers use them to transport gases and liquids.

Carbon steels can be strong but are not recommended for corrosive applications. Their durability makes them suitable for use in the construction and automotive industries.

Here is the appropriate chart.

Nominal Size [inches]Outside diameter [mm]Outer Diameter [inch]Wall thickness [mm]Wall Thickness [inches]Weight [kg/m]Peso [lb/ft]

Program 40 vs. 80

Schedule 40 and 80 are the two most common forms of this pipe. PVC Schedule 40 is typically white, while PVC Schedule 80 is typically dark gray and available in other colors. Its design is the most significant distinction. The wall thickness of Schedule 80 pipe is thicker. As a result, the tube is more stagnant and robust and can withstand more considerable pressure.

Timeline 40 is perhaps the most familiar to you. It's the white pipe you see around.buildingsfor sewage and is available at local hardware stores. This tube is best for drainage and irrigation. They are also ideal for other cold water systems. Schedule 40 PVC is strong and rigid, making it pressure resistant.


Polyvinyl chloride is hard and brittle in its original form. It is an additive for industrial and commercial uses. For greater flexibility and softness, manufacturers add plasticizers. The addition of heat stabilizers makes it resistant to extremely high temperatures. Prolonged exposure to sunlight would damage most plastics, but the addition of UV stabilizers makes the product tough.

One of the variants of PVC is CPVC, which has a higher chlorine content. The higher chlorine makes its high temperature threshold higher than regular PVC. It can withstand temperatures up to 200 F, while the regular variant can only withstand up to 140 F before starting to melt. CPVC is the preferred type for shippinghot water inHeating, ventilation and cooling (HVAC) systems. There is a mandate on building codes that require the use of CPVC.

UPVC is the original form of polyvinyl chloride. It does not contain softening additives, which makes it hard and brittle. This type is best for construction requirements where flexibility is not a primary concern. Manufacturers use it as a cladding or cladding material on the walls of houses in different countries.

How to measure PVC pipe (4 step guide)

You must use the nominal scale to calculate your measurements. Of course, you'll need to base your measurements on the structures of your hands rather than accurate scale measurements. I'll include a handy guide below to help you determine what size you need.

To explain further, you will see a detailed guide below on how to measure them:

Required time:5 minutes.

How to measure a PVC pipe

  1. Place the tube on a hard surface with one end facing you.
  2. Measure the distance between the left and right outer edges of the tube with a tape measure or ruler.

    When measuring, keep the ruler as level as possible.

  3. Now pair "Your Measurement" with "Average OD".
  4. Choose your tubes based on the average outside diameter of your measurements.

    Keep in mind that these measurements are for the outside edge, not the inside edge. Your internal measurements may vary depending on the piping program you need.

What is DO?

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (3)

They have a slightly larger outer diameter than the name suggests. They also use a nominal system. They are compatible parts with identical designations. All 1 inch tubes fit 1 inch fittings and so on. Dimensions in their names represent nominal sizes, not necessarily length. This is a difficult notion to grasp, but the point of the nominal system is to make finding the correct parts easier.

OD chart

your measureAverage outside diameter (OD)
Diameter, in inchesSize translation, in inches
1,661 ¼
1.91 ½
43 ½
Works for Schedule 40 and 80 pipeline

what to consider

If you are worried about which one to use, here is a detailed comparison below before adding products to your shopping cart. It's not a different way of making sure you get the right equipment or tool.

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (4)


The crucial physical difference between the 40 schedule and the 80 schedule is the wall thickness. With a significant increase in ratings, the material thickness of pipes and fittings will increase. For the specified size, Schedule 40 will have thinner walls. This involves less material, which leads to a weaker result. This can affect the acceptability of the design if the integrity of the piping for its intended use is in question. Thicker tubes will have greater structural and chemical strength and rigidity than those with a higher schedule. They are better at managing stress and resisting pressure.

Thickness specs can be very important depending on the required functionality.

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (5)


The highest pressure rating in pounds per square inch (psi) of plumbing is governed by how they program it. For better pressure management, the higher number tube is right for you. The increase in material thickness indicated by the pipe is a direct result of its service tolerance to excess water pressure. In general, Schedule 80 is a safer, more durable option for pressurized liquid applications. If operating pressure ranges are within specified parameters, Schedule 40 may be a good choice.

NPS and outside, inside diameter

Nominal pipe size (NPS) dimensions for Schedule 40 and Schedule 80 pipe will be the same for the same size. The NPS measurement is equivalent to its outside diameter (OD), which is the same for both types. The meaning between programs 40 and 80 is the measurement of the inside diameter (ID). The additional material used in Program 80 simply thickens the sidewalls on the inside of the tube. Schedule 80 has a smaller inside diameter, which causes a slight limitation of fluid flow through the tube.

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (6)


Schedule 80 plumbing has a higher purchase price than Schedule 40 plumbing parts. The additional material provided by the thicker Schedule 80 sidewall and built-in colorant contribute to its higher cost.


The tubes of the 40 and 80 programs are usually colored differently to distinguish them. Schedule 40 plumbing is typically natural white with no added colors, while Schedule 80 plumbing is usually gray in color. It is worth noting that there are often exceptions to the rule, and some manufacturers may not adhere to the standard color scheme. While the color can help distinguish between the Schedule 40 tube and the Schedule 80 tube, always check the detailed information printed on the sides of the tube.


PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (7)

Schedule 40 or 80 pipe constructed of the same material is installed in the same manner. Per ASTM standards, outside diameters must be the same on all equivalent NPS pipe schedules. This feature supports variable schedule tubes to be joined using standard fittings and joining methods for that tube content.

PVC pipe: dimensions, measurement tables, schedule 20, 40, 80 and 120 (8)

Application and Use

Schedule 80 plumbing is stronger and tougher than its 40 counterparts due to its thicker wall thickness. Use larger tubing for components in plumbing applications. They must be suitable for high pressure stresses and mechanical stresses.

This does not mean that schedule 80 is ideal because an application will be dealing with chemicals or liquids under pressure. Plumbing applications are pretty accurate, especially those involving chemicals. Many people base their ideal choice on a reasoned rating, whether it's a 40 or an 80. Consider all the characteristics of the structure's intended use. Schedule 40 piping over 80 piping can save piping material and associated expenses if Schedule 40 is acceptable for the operating parameters of the scenario.

frequently asked questions

What are the standard PVC pipe sizes?

It comes in a variety of sizes, as you'd expect. 1 1/2 inches, 2 inches, 3 inches, and 4 inches are the most popular diameters used around the house. You must use the 1/2 inch dimension to collect water from abathroomvanity or abathtub.

Is PVC pipe measured by ID or OD?

Professionals measure tubes in outside diameter. It will be if you measure the outside diameter (OD) of the tube in inches or fractions of an inch. However, nominal pipe size or ID is the most common pipe measurement. Although it is related to the outer diameter, it is very different.

What is the outside diameter of a 1.5" PVC pipe?

1.5 inches, Schedule 40 has a nominal ID of 1.5 inches and 1-7/8 inches OD. Therefore, the 1.5-in. has a diameter of approximately 1-7/8 in.

Is the plumbing pipe OD or ID?

I recommend using the tube ID (inside diameter) to identify the tube and is known as the "nominal" size. It means "in name only". This complicates everything, as most beginners try to order parts using the OD (outer diameter).

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