Compression Coupling
Polypropylene equal compression coupling for fast and reliable jointing of two PE pipes of identical diameter in pressurized water and irrigation networks without welding or heavy tools.
- Quick and easy assembly without welding machines or power supply on site
- Manufactured from polypropylene with high resistance to sunlight and soil chemicals
- Complete leak tightness via quality elastomeric O-ring and anti-pull-out grip ring
- Rated for operating pressures up to PN10 in water supply and agricultural lines
- Fully demountable and reusable for seasonal or reconfigurable irrigation layouts
Key Specifications
- Product code
- P041
- Reference standard
- ISO 17885
- Material & grade
- PP
- Outside diameter
- 20–125 mm
- Nominal pressure (at 20 °C)
- PN10
- Joint type
- Compression
- Unit of sale
- Piece
- Applications
- Drinking water supply, Irrigation & agriculture
- Dimensional options
- 10 rows in the specification table
Function and structure of equal compression couplings
The equal compression coupling, commonly known as a compression socket, is one of the most widely used fittings in agricultural water distribution and landscape irrigation. It comprises five essential components: a polypropylene body, tightening nuts at both ends, a spacer sleeve, an engineered grip ring (split ring), and an elastomeric seal ring. Tightening the nut forces the grip ring to clamp onto the pipe exterior, preventing blow-out under operating hydraulic pressure.
In conformity with ISO 17885 specifications, these fittings are engineered to withstand continuous hydraulic pressures and offer superior resistance to impact, abrasion, and agrochemicals. These characteristics significantly accelerate site installation in drip and sprinkler schemes compared to thermal fusion methods.
Applications and dimensional coverage
This product is widely utilized in potable water pipelines, orchards, open-field agriculture, commercial greenhouses, and raw water conveyance. Compression couplings are typically supplied in outside diameters from 20 to 125 mm with a nominal pressure rating of PN10. The chosen coupling diameter must match the outside diameter (od_mm) of the connecting polyethylene pipe so that the internal grip ring and seal seat correctly.
Prior to assembly, the pipe end must be cut square and deburred. Inserting the pipe firmly past the O-ring to the inner shoulder guarantees hermetic sealing. For technical submittals and formal quotations, please submit your pipe dimensions and project pressure requirements via the inquiry form.
Compression Coupling — Technical Specifications
Wall thickness and weight are calculated from the standard series and are approximate; final values are confirmed in the quotation.
| Outer Diameter (mm) | Nominal Pressure (bar) |
|---|---|
| 20 | 10 |
| 25 | 10 |
| 32 | 10 |
| 40 | 10 |
| 50 | 10 |
| 63 | 10 |
| 75 | 10 |
| 90 | 10 |
| 110 | 10 |
| 125 | 10 |
Compression Coupling — FAQ
Are solvents, adhesives, or heating tools required during installation?
No, compression couplings seal mechanically by tightening the threaded cap and require no adhesives, solvents, or heating equipment.
What size range is typically available for equal compression couplings?
This fitting is generally manufactured in outside diameters ranging from 20 to 125 mm to match standard polyethylene pipe dimensions.
Can this fitting be used in gas distribution networks?
No, polypropylene compression fittings are designed strictly for pressurized water and liquid conveyance, never for fuel gases.
What is the nominal working pressure of this fitting?
This fitting is typically rated and tested for a maximum working pressure of 10 bar (PN10) in water distribution piping.
