Pipe Size & Dimensions Identification Chart
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 1½” 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 Size & Dimension 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 | Metric Pressure Pipe | Imperial Pressure Pipe | Domestic Waste Solvent Weld Pipe (Glue Fit) | Domestic Waste Push Fit Pipe (Rubber Ring Seal) |
|---|---|---|---|---|
| 12 mm | 12 mm | |||
| 16 mm | 16 mm | |||
| 17.1 mm | 3/8″ | |||
| 20 mm | 20 mm | |||
| 21.4 mm | 1/2″ | |||
| 25 mm | 25 mm | |||
| 26.7 mm | 3/4″ | |||
| 32 mm | 32 mm | |||
| 33.6 mm | 1″ | |||
| 35 mm | 32mm or 1¼” | |||
| 36 mm | 32mm or 1¼” | |||
| 40 mm | 40 mm | |||
| 41 mm | 40mm or 1½” | |||
| 42.2 mm | 1¼” | |||
| 43 mm | 40mm or 1½” | |||
| 48.3 mm | 1½” | |||
| 50 mm | 50 mm | |||
| 54 mm | 50mm or 2″ | |||
| 56 mm | 50mm or 2″ | |||
| 60.3 mm | 2″ | |||
| 63 mm | 63 mm | |||
| 75 mm | 75 mm | |||
| 75.2 mm | 2½” | |||
| 82 mm | 82mm or 3″ | 82mm or 3″ | ||
| 88.9 mm | 3″ | |||
| 90 mm | 90 mm | |||
| 110 mm | 110 mm | 110mm or 4″ | 110mm or 4″ | |
| 114.3 mm | 4″ | |||
| 125 mm | 125 mm | |||
| 140 mm | 140 mm | |||
| 140.2 mm | 5″ | |||
| 160 mm | 160 mm | 160mm or 6″ | 160mm or 6″ | |
| 168.3 mm | 6″ | |||
| 200 mm | 200 mm | |||
| 219.1 mm | 8″ | |||
| 225 mm | 225 mm | |||
| 250 mm | 250 mm | 250 mm | 250 mm | |
| 273.1 mm | 10″ | |||
| 315 mm | 315 mm | 315 mm | 315 mm |
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