PVC Pipes manufacturers

There are several types and qualities of PVC pipes that are used for industrial and residential projects.

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.

Important: PVC Schedule

PVC Schedule (abbrev. SCH or Sch.) is the thickness of the PVC pipe wall. The most common Schedule is 40, but Schedule 80 PVC is also available.  As the schedule gets larger the pipe wall gets thicker from the outside in, so the inside hole (bore) of the pipe gets smaller.

FORMUFIT internal-fit products, such as Internal Dome Caps, Adjustable Elbows and Internal Couplings are only compatible with Schedule 40 PVC pipe. All FORMUFIT Furniture Grade PVC pipe is Schedule 40.  Our internal-fit products will not work with PVC Schedule 80, as the inner diameter of 80 Schedule PVC is much smaller than PVC Schedule 40.

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. 13/16 in. 21.33 mm 0.622 in. 0.109 in.
3/4 in. PVC Pipe 1.050 in. 1-1/16 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. 13/16 in. 21.33 mm 0.546 in. 0.147 in.
3/4 in. PVC Pipe 1.050 in. 1-1/16 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.

PVC Thin wall Sizes Table

Thin Wall 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 Thin Wall PVC due to the larger inner diameter.

Not all sizes are available in Thin wall PVC pipe.

Pipe Size
(SCH 40)
Actual OD
(Decimal)
Actual OD
(Fraction)
Actual OD
(Metric)
Average ID
(Decimal)
Min. Wall
Thickness
3/4 in. PVC Pipe 1.050 in. 1-1/16 in. 26.67 mm 0.920 in. 0.065 in.
1 in. PVC Pipe 1.315 in. 1-5/16 in. 33.40 mm 1.185 in. 0.065 in.
1-1/2 in. PVC Pipe 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..

PVC vs. CPVC Incompatibility

All FORMUFIT Products are designed to fit Nominal Pipe Size (NPS) size, white, Schedule 40 PVC pipe. However, many hardware stores and home centers carry a different style of pipe called CPVC, also known as Copper Tube Size (CTS) plastic pipe, which is not compatible with FORMUFIT and other brands of PVC fittings.

cpvc vs. pvc comparison

I ordered (1/2, 3/4 or 1 in.) fittings from FORMUFIT, but they don’t fit my pipe?
Check to see if the pipe you are trying to use is CPVC. You can do this by checking the color of the pipe: CPVC is a gold/yellow/tan color, whereas Schedule 40 PVC plumbing pipe is a dull white. Also, markings on the pipe with the following acronyms or names will be present for CPVC:

CPVC
CTS or Copper Tube Size
CPVC Pipe Markings

If the above are not marked on your PVC pipe, you may have ordered the incorrect size for your Schedule 40 PVC pipe. In that case, please see our Important PVC Pipe Size Information.

Whats different about CPVC vs. PVC and why can’t I use it?

CPVC was designed as a replacement for copper plumbing tubing, with a water-potable and less-expensive plastic solution. It is designed to fit into the exact same holes and locations where existing copper pipe is being replaced, so it has a smaller outside diameter (OD) than typical white, Schedule 40 plumbing-grade PVC. Since CPVC pipe uses a different measurement system and is smaller than their Schedule 40 counterparts, it is not compatible with FORMUFIT fittings and accessories.

CPVC to the Schedule 40 PVC pipe of the equivalent size. If you have not yet cut your pipe, most home centers and hardware stores will allow you to exchange your CPVC pipe for the Schedule 40 equivalent size. This is usually the less expensive alternative than returning your items to FORMUFIT, as we do not carry CPVC-compatible products.

About Zaighum Shah 90 Articles
Zaighum Shah is a mechanical engineer having more than 20 years of experience. Zaighum is specializing in product development in Sugar Mill industries. Zaighum has gone through all phases of mechanical engineering and it’s practical implementation. Zaighum has been solving most complex problems, designing new systems and improving existing models and systems.