A concentric reducing coupling that joins two HDPE fresh air pipes of different diameters. It keeps the duct centreline aligned, so the airflow transition stays smooth and the run stays straight — useful where a main duct steps down to a smaller branch, or where a coil must be adapted to an existing duct size.
| Item | Specification |
|---|---|
| Available Sizes / Models | Multi-size conversion for HDPE corrugated fresh air ventilation pipe |
| Description | Quick buckle concentric reducing adapter for fresh air pipeline. Used for connection between ventilation pipes of different diameters, quick to install, reliable sealing, widely applied in household fresh air duct systems. |
| Material / Construction | High-quality PP engineering plastic |
Works alongside straight couplings, reducing tees, quick-connect tees and our HDPE corrugated pipe.
Q: Which size combinations are available?
A: The reducer covers the usual transitions within the HDPE corrugated pipe range. Please confirm the required pair of sizes when ordering.
Q: Does it need sealing tape?
A: No, the push-fit joint seals as assembled.
Q: Can it be released later?
A: Yes, the buckle joint can be opened.
The southeast corner of the private entrepreneurship park in Huadian Town, Qihui County, Dezhou City, Shandong Province
