Product Description
Transition Between Pipe Sizes with Confidence
The HDPE Reducing Coupling is a specialized fitting used to connect two high-density polyethylene (HDPE) pipes of different diameters. It combines the functions of a standard coupling and a reducer, allowing for size transitions while maintaining the integrity of your irrigation system.
For small and medium-scale farmers in Kenya, this fitting is essential when you need to connect a larger mainline to a smaller branch line, such as joining a 50mm pipe to a 32mm pipe. Choosing a high-quality HDPE Reducing Coupling ensures your pipe network remains secure and leak-free.
Why Rigid Polypropylene is the Practical Choice
Although these fittings are used to join HDPE pipes, the body and the compression nuts are manufactured from high-grade Polypropylene (PP). This material is chosen because it is rigid and can hold deep mechanical threads on the nut and body much better than flexible HDPE.
This rigidity is what allows the nut to tighten firmly against the fitting body, creating a seal that will not warp or leak under the weight of the soil or the pressure of the water. The internal design features a shoulder where the pipe seats, ensuring a firm stop for a reliable mechanical connection.
Available Sizes
IrriHub supplies a wide range of reducing couplings to match your farm's piping needs. Please refer to our current prices from our store below:
|
Size (Large x Small) |
Price (KES) |
|
32mm x 20mm |
170.00 |
|
32mm x 25mm |
200.00 |
|
40mm x 25mm |
310.00 |
|
40mm x 32mm |
310.00 |
|
50mm x 32mm |
410.00 |
|
50mm x 40mm |
440.00 |
|
63mm x 32mm |
600.00 |
|
63mm x 40mm |
650.00 |
|
63mm x 50mm |
750.00 |
|
75mm x 50mm |
1,000.00 |
|
75mm x 63mm |
1,200.00 |
|
90mm x 50mm |
1,350.00 |
|
90mm x 63mm |
1,400.00 |
|
90mm x 75mm |
1,500.00 |
|
110mm x 50mm |
2,100.00 |
|
110mm x 63mm |
2,200.00 |
|
110mm x 75mm |
2,300.00 |
|
110mm x 90mm |
2,600.00 |
Understanding Pressure and Flow
These reducing couplings are built to handle the demands of high-pressure irrigation systems. It is important for farmers to understand how changing pipe sizes affects water movement. When you move water from a larger pipe to a smaller one, the speed (velocity) of the water increases.
However, it is pressure, not speed, that pushes water to the ends of your field. High velocity caused by reducing pipe sizes too drastically leads to increased friction and head loss, which can starve your drippers or sprinklers of the pressure they need.
While these fittings are designed for high-pressure systems, please note that pressure ratings typically transition from PN16 to PN10 for larger sizes of 75mm and above. Always verify the rating stamped on the fitting body for your specific application.
Installation and Compatibility
To achieve a professional, leak-proof result, proper installation is required. You should always use a pipe cutter to ensure a square and clean edge on your HDPE pipes before insertion. These fittings are specifically designed for use with PE or HDPE pipes, as the internal clinching ring is made to bite into the polyethylene surface for a secure grip.
These fittings are designed based on the Outside Diameter (OD) of the pipe, meaning a 50mm fitting will fit any 50mm HDPE pipe. For fittings sized 40mm and above, hand-tightening is generally insufficient to reach a pressure-safe seal. We recommend using a standard fitting wrench to ensure the internal components properly engage the pipe.
IrriHub provides reliable irrigation and farm systems for small and medium-scale farmers across Kenya. For help choosing the right product for your farm, reach out to us directly.
Call us: +254 729 717 881 Visit our store: Shubham Complex, Old Mombasa Rd,