Pipe Size and Dimensions Identification Chart

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Domestic Waste Pipe Sizes. Metric and imperial Pressure pipe sizes and identification
We offer four different plastic pipe systems.
PUSH FIT: Polypipe range. A system designed for domestic waste drainage. All pipe fittings have sockets with a rubber seal which prevents leakage when the pipe is inserted. Only suitable for drainage use, limited range of pipe fittings.
SOLVENT WELD: Polypipe range. Joining is by gluing pipe into sockets -solvent weld- Once made joints will not separate. Designed as a domestic waste pipe drainage system, an excellent range of pipe fittings and some threaded pipe fittings available for more complex installations.
IMPERIAL: A true pressure system rated up to 16bar. Good range of glue socket pipe fittings and threaded bsp connections. System can be glued and screwed together. Use for water and chemicals.
METRIC: A versatile pressure system rated to 16bar excellent range of pipe fittings for glue and threaded fittings, more economical than imperial system Use for water and chemicals.
Pipe Sizes and descriptions can be confusing, usually because the actual pipe size bears no resemblance to its' description.
For example 1" imperial pressure pipe, when measured on its' outside diameter is exactly 48.3mm or just under 2". Many people make the assumption that it is 2" pipe and go on to order fittings only to find they don't fit. Pipes from the different groups cannot be mixed. Special conversion fittings must be used to change from one to another if necessary.

Domestic Waste Pipe Sizes. Metric and imperial Pressure pipe sizes and identification
We offer four different plastic pipe systems.
PUSH FIT: Polypipe range. A system designed for domestic waste drainage. All pipe fittings have sockets with a rubber seal which prevents leakage when the pipe is inserted. Only suitable for drainage use, limited range of pipe fittings.
SOLVENT WELD: Polypipe range. Joining is by gluing pipe into sockets -solvent weld- Once made joints will not separate. Designed as a domestic waste pipe drainage system, an excellent range of pipe fittings and some threaded pipe fittings available for more complex installations.
IMPERIAL: A true pressure system rated up to 16bar. Good range of glue socket pipe fittings and threaded bsp connections. System can be glued and screwed together. Use for water and chemicals.
METRIC: A versatile pressure system rated to 16bar excellent range of pipe fittings for glue and threaded fittings, more economical than imperial system Use for water and chemicals.
Pipe Sizes and descriptions can be confusing, usually because the actual pipe size bears no resemblance to its' description.
For example 1" imperial pressure pipe, when measured on its' outside diameter is exactly 48.3mm or just under 2". Many people make the assumption that it is 2" pipe and go on to order fittings only to find they don't fit. Pipes from the different groups cannot be mixed. Special conversion fittings must be used to change from one to another if necessary.

Pipe Sizes and Dimensions Chart
Find the outside diameter of your pipe to the nearest millimetre, use a tape measure or vernier gauge.
Then find this size down the left hand column, read across the four coloured columns on the right to find the group and description for your size pipe. If your size only appears in one column, look at the top of that column to see which group it is - metric,imperial, solvent or push fit. If your pipe size appears in more than one column then it will work with all those groups. If the pipe is grey it is more likely to be pressure pipe. But please feel free to ask if you are uncertain
.
Your Pipe Size OUTSIDE diameter
12mm
16mm
17.1mm
20mm
21.4mm
25mm
26.7mm
32mm
33.6mm
1"
35mm
36mm
40mm
41mm
42.2mm
43mm
48.3mm
50mm
54mm
56mm
60.3mm
2"
63mm
75mm
75.2mm
82mm
88.9mm
3"
90mm
110mm
114.3mm
4"
125mm
140mm
140.2mm
5"
160mm
168.3mm
6"
200mm
219.1mm
8"
225mm
250mm
273.1mm
10"
315mm
Pipe OUTSIDE diameter
Do not use the internal bore measurement to find the pipes' size
Pipe Sizes and Dimensions Chart
Find the outside diameter of your pipe to the nearest millimetre, use a tape meaasure or vernier gauge. Then find this size down the left hand column, read across the four coloured columns on the right to find the group and description of your size pipe. If your size only appears in one column, look at the top of that column to see which group it is - metric, imperial, solvent or push fit. If your pipe size appears in more than one column then it will work with all these groups. If the pipe is grey it is more likely to be pressure pipe. But please feel free to ask if you are uncertain.
Your Pipe Size
OUTSIDE Diameter
Metric
Pressure Pipe
Imperial
Pressure Pipe (Inch)
Domestic Waste Pipe
Solvent Weld
(Glue)
Domestic Waste Pipe
Push Fit
(Rubber Ring Seal)
12mm 12mm
16mm 16mm
17.1mm 3/8"
20mm 20mm
21.4mm 1/2"
25mm 25mm
26.7mm 3/4"
32mm 32mm
33.6mm 1"
35mm 32mm or 1"
36mm 32mm or 1"
40mm 40mm
41mm 40mm or 1"
42.2mm 1"
43mm 40mm or 1"
48.3mm 1"
50mm 50mm
54mm 50mm or 2"
56mm 50mm or 2"
60.3mm 2"
63mm 63mm
75mm 75mm
75.2mm 2"
82mm 82mm or 3" 82mm or 3"
88.9mm 3"
90mm 90mm
110mm 110mm 110mm or 4" 110mm or 4"
114.3mm 4"
125mm 125mm
140mm 140mm
140.2mm 5"
160mm 160mm 160mm or 6" 160mm or 6"
168.3mm 6"
200mm 200mm
219.1mm 8"
225mm 225mm
250mm 250mm 250mm 250mm
273.1mm 10"
315mm 315mm 315mm 315mm

BSP Threaded Fitting Sizes

BSP screw thread sizes explained.
MALE bsp thread- the thread is cut into the OUTSIDE of the pipe and is measured on the outside diameter.
To identify a threaded pipe fitting size compare the outside
diameter of the threaded portion with our BSP pipe size chart. Male Thread - Outside Diameter

FEMALE bsp thread- the thread is cut into the INSIDE of the pipe, and is measured by the inside diameter.
To identify a threaded pipe fitting size compare the inside
diameter with our BSP pipe size chart- Female Thread- Inside Diameter.

BSP Threaded Fitting Sizes

BSP screw thread sizes explained.
MALE bsp thread- the thread is cut into the OUTSIDE of the pipe and is measured on the outside diameter.
To identify a threaded pipe fitting size compare the outside
diameter of the threaded portion with our BSP pipe size chart. Male Thread - Outside Diameter

FEMALE bsp thread- the thread is cut into the INSIDE of the pipe, and is measured by the inside diameter.
To identify a threaded pipe fitting size compare the inside
diameter with our BSP pipe size chart- Female Thread- Inside Diameter.

MALE BSP THREAD
FEMALE BSP THREAD
BSP Thread size
¼"
½"
¾"
1"
2"
Male Thread - Outside Diameter
13mm
17mm
21mm
26.5mm
33.6mm
42mm
48mm
60mm
Female Thread - Inside Diameter
11.5mm
15mm
18.6mm
24mm
30mm
38.5mm
45mm
57mm
Measure the thread across the diameter in millimeters

MALE BSP THREAD

FEMALE BSP THREAD

BSP Thread Size Male Thread
Outside Diameter
Female Thread
Inside Diameter
" 13mm 11.5mm
⅜" 17mm 15mm
" 21mm 18.6mm
" 26.5mm 24mm
1" 33.6mm 30mm
1" 42mm 38.5mm
1" 48mm 45mm
2" 60mm 57mm

Henderson Plastics Ltd
Lyng Hall Road
Wood Norton
Dereham
Norfolk
NR20 5BJ
Tel: 01362 683 364
E-mail

Henderson Plastics Ltd