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PVC Pipe Size Dimensions Chart

FORMUFIT products are compatible with most Schedule-based PVC pipe systems.  To provide additional support, the following tables outline the physical dimensions and pipe diameter of each PVC Pipe Size that will work with FORMUFIT products.

Each of the following dimensions are separated by Schedule in each table and follow the 'Nominal Size' rules. Refer to the diagram below for an explanation of each measurement. For a detailed explanation on Schedule and how it applies to PVC pipe, please click here.

千亿体育官网PVC Pipe is identified by the Inside Diameter (ID) of the pipe.  This measurement is known as ‘Nominal’ which means in-name-only, or a referenced name.  One of the issues encountered with many of our customers is that they attempt to measure the Outside Diameter (OD) of the pipe, which will give a completely different (and larger) PVC pipe dimension. 

千亿体育官网If you prefer to measure the outer diameter of PVC pipe:

  1. Take your OD measurement and look in the second or third column (Actual OD) of each table below.  
  2. Once the pipe OD is determined, look to the left-most column of the charge below (Pipe Size).  This will be the nominal pipe size, or the size of fittings you want to order.

How to measure PVC pipe

PVC Schedule 40 Sizes Table

千亿体育官网Schedule 40 PVC pipe is compatible with all FORMUFIT external-fit and internal-fit products.

Size (SCH 40)
Decimal OD
Fraction OD
Metric OD
Average ID
Min. Wall Thickness
1/2 in.
0.840 in.
13/16 in.
21.33 mm
0.622 in.
0.109 in.
3/4 in.
1.050 in.
1-1/16 in.
26.67 mm
0.824 in.
0.113 in.
1 in.
1.315 in.
1-5/16 in.
33.40 mm
1.049 in.
0.133 in.
1-1/4 in.
1.660 in.
1-5/8 in.
42.16 mm
1.380 in.
0.140 in.
1-1/2 in.
1.900 in.
1-7/8 in.
48.26 mm
1.610 in.
0.145 in.
2 in.
2.375 in.
2-3/8 in.
60.32 mm
2.047 in.
0.154 in.

PVC Schedule 80 Sizes Table

Schedule 80 PVC pipe is only compatible with FORMUFIT external-fit products. FORMUFIT internal-fit products, such as Internal Dome Caps, Adjustable Elbows, Internal Couplings and other products that fit inside of the PVC pipe will not work with SCH 80 PVC due to the smaller internal diameter.

Size (SCH 80)
Decimal OD
Fraction OD
Metric OD
Average ID
Min. Wall Thickness
1/2 in.
0.840 in.
13/16 in.
21.33 mm
0.546 in.
0.147 in.
3/4 in.
1.050 in.
1-1/16 in.
26.67 mm
0.742 in.
0.154 in.
1 in.
1.315 in.
1-5/16 in.
33.40 mm
0.957 in.
0.179 in.
1-1/4 in.
1.660 in.
1-5/8 in.
42.16 mm
1.278 in.
0.191 in.
1-1/2 in.
1.900 in.
1-7/8 in.
48.26 mm
1.500 in.
0.200 in.
2 in.
2.375 in.
2-3/8 in.
60.32 mm
1.939 in.
0.218 in.

PVC Thinwall Sizes Table

Thinwall PVC pipe is only compatible with FORMUFIT external-fit products. FORMUFIT internal-fit products, such as Internal Dome Caps, Adjustable Elbows, Internal Couplings and other products that fit inside of the PVC pipe will not work with Thinwall PVC due to the larger inner diameter.

Please note that not all PVC sizes are available in Thinwall PVC pipe.

Size (Thinwall)
Decimal OD
Fraction OD
Metric OD
Average ID
Min. Wall Thickness
3/4 in.
1.050 in.
1-1/16 in.
26.67 mm
0.920 in.
0.065 in.
1 in.
1.315 in.
1-5/16 in.
33.40 mm
1.185 in.
0.065 in.
1-1/2 in.
1.900 in.
1-7/8 in.
48.26 mm
1.750 in.
0.075 in.

 

CPVC Pipe

CPVC pipe, also known as Copper Tube Size (CTS) plastic pipe uses a different measurement system and is not compatible with FORMUFIT PVC products. Please see our CPVC Identification Page千亿体育官网 for more information.

Additional Ratings

Please note that we do not provide pressure rating or temperature ratings for PVC pipe and fittings as our products are designed for structural use and are not ideal for plumbing applications. While our products do carry the same ratings as standard Schedule 40 and Schedule 80 PVC plumbing pipe and fittings, they have not been tested with the National Sanitary Foundation (NSF) for this application.

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