Compression reducing coupling, polyethylene, PN 6 bar, d. 40 x 25

HDPE compression reducing coupling PN 6 bar, d 40 × 25 is a transition fitting designed to quickly and reliably connect a Ø40 mm pipe to a Ø25 mm line without welding or complex tools. It is an optimal solution for new pipeline installations and for repairs where speed, leak-tightness, and long-term durability are essential, as well as for a clean step-down in diameter for distribution lines, branches, and equipment connections.

The body is made of high-quality high-density polyethylene (HDPE). This material is engineered for utility and engineering systems and valued for its resistance to external impacts. The inner surface of the fitting is uniform and non-porous: flow passes freely, deposits build up less, and the water does not contact foreign additives — the design contains no substances that could affect taste or odor. This is especially important for potable water supply systems and facilities with elevated requirements for water quality.

Leak-tight performance at PN 6 bar is ensured by rubber sealing rings that create a firm contact and resist leakage. An additional “safety factor” in installation quality is the conical tightening mechanism: it compensates for slight size differences and pipe ovality up to ±0.5 mm, helping deliver a reliable result even when installing pipes from different batches or after storage. A corrosion-resistant reinforcing ring is included to improve long-term tightness and stability during temperature fluctuations, so the joint remains consistent throughout its service life.

The fitting is also UV-resistant, making it suitable for exposed outdoor sections, manholes, irrigation lines, and greenhouse systems. UV stability helps reduce the risk of unwanted biological activity (algae/bacteria) in sunlit areas. The blue/black color supports quick on-site identification and gives a neat appearance in assembled systems.

Typical applications for the 40×25 PN 6 reducer:

potable and technical water supply networks;

irrigation, watering, greenhouses, and connecting watering zones and main lines;

industrial and domestic high-pressure sewer networks;

fire-fighting pipelines and auxiliary lines.

Customer benefits:

welding-free installation — fast, clean, and convenient for repairs;

high leak-tightness thanks to sealing rings and a well-engineered design;

compensates pipe ovality up to ±0.5 mm;

UV- and temperature-fluctuation resistant;

suitable for polyethylene and polyethylene terephthalate pipes.

If you need a dependable, easy-to-install Ø40 → Ø25 reducer with predictable results, this PN 6 bar compression fitting is a practical choice for both professional and household applications.