Description
Rubber Flexible Reducer for Imperial Pipe
Our Rubber Flexible Reducers for Imperial Pipe provide a quick and reliable solution for connecting drainage pipes of different diameters without the need for solvent welding or specialist installation equipment.
Designed for non-pressure drainage applications, these flexible rubber reducing couplings are manufactured to suit standard imperial pipe outside diameters. They are ideal for connecting different pipe sizes during drainage repairs, alterations and new installations.
Each reducer is supplied complete with stainless steel worm drive clips, providing a secure mechanical connection at both ends. The flexible rubber construction accommodates slight pipe misalignment and minor variations in outside diameter.
Key Features & Benefits
- Flexible Rubber Construction – Accommodates slight pipe misalignment.
- Reducing Connection – Connects imperial pipes of different diameters.
- Stainless Steel Clips Included – Supplied complete with worm drive clips.
- Imperial Pipe Compatibility – Designed to suit standard imperial PVC pipe outside diameters.
- Non-Pressure Applications – Suitable for gravity drainage and waste pipe systems.
- Quick & Easy Installation – No solvent cement, welding or specialist tools required.
- Ideal for Repairs – Suitable for maintenance, alterations and new installations.
- Multiple Sizes Available – Various reducing combinations from 1" x 3/4" up to 4" x 3".
Important – Understanding Imperial Pipe Sizes
Imperial PVC pipe sizes are nominal sizes, not the actual outside diameter of the pipe.
For example, 2" imperial PVC pressure pipe has an outside diameter of approximately 60.3mm, not 50.8mm (2 inches).
These flexible reducers are designed to fit the actual outside diameter of standard imperial PVC pipe, rather than the physical measurement suggested by the nominal inch size.
Always check the pipe markings and measure the outside diameter before ordering to ensure the correct fitting is selected.
Imperial Reducer Sizes & Fitting Ranges
The table below shows the nominal imperial reducer sizes, the corresponding pipe outside diameters and the fitting ranges required for each connection.
| Reducer Size (Inch) |
Small End Fitting Range (mm) |
Large End Fitting Range (mm) |
|---|---|---|
| 1" x 3/4" | 25–28 | 32–35 |
| 1 1/4" x 1" | 32–35 | 39–44 |
| 1 1/2" x 1" | 32–35 | 46–51 |
| 1 1/2" x 1 1/4" | 39–44 | 46–51 |
| 2" x 1" | 32–35 | 59–64 |
| 2" x 1 1/2" | 46–51 | 59–64 |
| 3" x 2" | 59–64 | 86–91 |
| 4" x 1 1/2" | 46–51 | 110–116 |
| 4" x 2" | 59–64 | 110–116 |
| 4" x 3" | 86–91 | 110–116 |
Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Flexible Rubber Reducing Coupling |
| Connection Type | Mechanical Clamp Connection |
| Clips | Stainless Steel Worm Drive Clips Included |
| Pipe Compatibility | Imperial PVC Pipe Outside Diameters |
| Application | Non-Pressure Drainage |
| Pressure Rating | Not Suitable for Pressurised Systems |
| Installation | Mechanical Clamp Connection |
Typical Applications
- Gravity drainage systems
- Waste water pipe connections
- Connecting imperial PVC pipes of different diameters
- Drainage pipe repairs and alterations
- New non-pressure drainage installations
- Connecting pipes with slight misalignment
Replacement Clips & Accessories
Each flexible reducer is supplied complete with stainless steel worm drive clips. If additional or replacement clips are required, browse our range of Stainless Steel Jubilee Clips .
Important Installation Information
Not Suitable for Pressurised Systems: These rubber flexible reducers are designed exclusively for non-pressure drainage applications. They must not be used on pressurised water supply systems, pumped pressure pipelines or other applications requiring pressure-rated fittings.
Pipe Sizing: Imperial pipe sizes are nominal measurements. Always check the pipe markings and measure the actual outside diameter of both pipes before selecting a reducer.
Installation: Ensure pipe ends are clean, correctly aligned and fully inserted into the reducer. Tighten the stainless steel worm drive clips evenly in accordance with the manufacturer's installation instructions.
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