Compression reducing coupling, polyethylene, PN 6 bar, d. 40 x 20

HDPE compression reducing coupling PN 6 bar, d 40 × 20 is a transition adapter that neatly and reliably connects a Ø40 mm main line to a Ø20 mm branch. It is an ideal option for water supply distribution and irrigation systems when you need a quick step-down in diameter without welding, extra couplers, or unnecessary sealing risks.

The fitting is made from high-quality high-density polyethylene (HDPE). This material is strong, resistant to external impacts, and designed for long-term use in utility and engineering networks. Inside, it features a uniform, non-porous surface that does not trap contaminants and helps maintain stable flow capacity over time. It is also suitable for potable water systems: the design contains no substances that could alter water taste or odor.

Leak-tight performance and confident operation at PN 6 bar are provided by rubber sealing rings, which create a tight contact and reduce the likelihood of leaks even under prolonged load. Another key benefit is the conical tightening system: it compensates for small pipe geometry deviations (size differences and ovality up to ±0.5 mm). This is especially helpful on sites where pipes may vary by batch or storage conditions — the joint seats evenly and predictably. A corrosion-resistant reinforcing ring is also included to improve long-term tightness and stability during temperature fluctuations.

The fitting is UV-resistant, making it suitable not only for indoor installations and manholes, but also for outdoor sections, irrigation lines, greenhouses, and technical pipelines. UV resistance helps reduce the risk of algae and bacteria development in sunlit sections. The blue/black color is easy to spot on site and simplifies maintenance.

Typical applications for the 40×20 reducer:

potable and technical water networks;

irrigation and watering systems, greenhouse lines;

industrial and domestic high-pressure sewer networks;

fire-fighting pipelines.

Why choose a compression connection:

installation without welding or special tools — convenient for repairs and upgrades;

reliable leak protection thanks to sealing rings;

compensates pipe ovality up to ±0.5 mm;

UV-, temperature-, and corrosion-resistant (via reinforcing ring);

compatible with polyethylene and polyethylene terephthalate pipes.

If you need a dependable Ø40 → Ø20 reducer with fast installation and a long service life, this PN 6 bar fitting is a practical solution for your project.