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. Refer to the diagram below for an explanation of each measurement. For an explaination on Schedule, please click here.

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.  If you prefer to measure the outside 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 you find your pipe OD, look to the left-most column (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

Schedule 40 PVC pipe is compatible with all FORMUFIT external-fit and internal-fit products.

Pipe Size
(SCH 40)
Actual OD
(Decimal)
Actual OD
(Fraction)
Actual OD
(Metric)
Average ID
(Decimal)
Min. Wall
Thickness
1/2 in. PVC Pipe 0.840 in. 7/8 in. 21.33 mm 0.622 in. 0.109 in.
3/4 in. PVC Pipe 1.050 in. 1-1/6 in. 26.67 mm 0.824 in. 0.113 in.
1 in. PVC Pipe 1.315 in. 1-5/16 in. 33.40 mm 1.049 in. 0.133 in.
1-1/4 in. PVC Pipe 1.660 in. 1-5/8 in. 42.16 mm 1.380 in. 0.140 in.
1-1/2 in. PVC Pipe 1.900 in. 1-7/8 in. 48.26 mm 1.610 in. 0.145 in.
2 in. PVC Pipe 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.

Pipe Size
(SCH 80)
Actual OD
(Decimal)
Actual OD
(Fraction)
Actual OD
(Metric)
Average ID
(Decimal)
Min. Wall
Thickness
1/2 in. PVC Pipe 0.840 in. 7/8 in. 21.33 mm 0.546 in. 0.147 in.
3/4 in. PVC Pipe 1.050 in. 1-1/6 in. 26.67 mm 0.742 in. 0.154 in.
1 in. PVC Pipe 1.315 in. 1-5/16 in. 33.40 mm 0.957 in. 0.179 in.
1-1/4 in. PVC Pipe 1.660 in. 1-5/8 in. 42.16 mm 1.278 in. 0.191 in.
1-1/2 in. PVC Pipe 1.900 in. 1-7/8 in. 48.26 mm 1.500 in. 0.200 in.
2 in. PVC Pipe 2.375 in. 2-3/8 in. 60.32 mm 1.939 in. 0.218 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 for more information.