Water evaporates in the sun
In full sun, an uncovered reservoir loses water to evaporation every day. A mesh tensioned over the water reduces direct sun exposure and limits that loss.
Covering irrigation reservoirs with polyester mesh
AGROPET® is the polyester wire that replaces galvanized steel for covering irrigation reservoirs and ponds. The tensioned grid holds the mesh that curbs evaporation and algae, and being polyester it does not rust in water or with fertigation, nor degrade under the Levante sun.
✓ Does not rust in water or with fertilizer
✓ UV-resistant
✓ 5× lighter than steel
✓ Made in Europe
Reservoir covers
The wire your irrigation reservoir needs
An irrigation reservoir loses water every day through evaporation and fills up with algae when the sun beats down on the water. Covering it with a tensioned mesh reduces this double problem, but the structure holding it works in constant contact with water, fertilizers and radiation.
AGROPET® is the high-tenacity polyester monofilament (PET wire) that forms this load-bearing grid: it tensions with the same tools as steel, ties by hand and does not rust or lose cross-section even when permanently wet and exposed to the sun.
- Does not rust or corrode: immune to permanent water, fertigation and treatments; it does not stain the water or the waterproof liner.
- UV-resistant: stabilized for years of direct sun on the reservoir without becoming brittle.
- Dielectric: it does not conduct electricity; safer next to pumps, probes and the wiring of the irrigation system.
- 5× lighter than steel: less effort and cost to cover large reservoir or pond surfaces.
- Stable from −40 °C to +90 °C and tensioned with Gripple® and standard tensioners without cutting your hands.
The problem and the solution
Why cover the reservoir with polyester instead of steel
Light triggers algae
The sun promotes algae growth, which fouls the water and clogs filters and drippers. Blocking the light with a cover curbs their proliferation.
Steel rusts in water
Galvanized wire or cable, always in contact with water and fertilizers, corrodes and stains. AGROPET® is 100 % immune to corrosion.
Sun and extreme temperatures
UV-resistant and works from −40 to +90 °C without losing tension: it withstands the summers of the Levante and the south-east without degrading.
Recommended gauge
Which AGROPET® gauge for covering a reservoir
The gauge depends on the span between supports and the weight of the cover. The high gauges are used for the load-bearing lines and the intermediate ones for the secondary grid. We advise you according to the dimensions of your reservoir or pond.
| Gauge | Recommended use |
|---|---|
| 5 mm | Main load-bearing lines and long spans / reservoirs (breaking load 616 kgf). |
| 4 mm | Load-bearing grid for medium-sized ponds (breaking load 405 kgf). |
| 3 mm | Secondary grid and mesh fastening (breaking load 365 kgf). |
Frequently asked questions
Covering irrigation reservoirs: frequently asked questions
What is the point of covering an irrigation reservoir with polyester mesh?
A cover tensioned over the reservoir limits direct sun exposure on the water: it reduces evaporation, curbs algae growth by blocking the light and keeps the water cleaner. AGROPET® wire forms the load-bearing grid that holds the cover without rusting.
Does polyester withstand water, fertilizers and chlorine?
Yes. AGROPET® is PET polyester monofilament: it does not rust or corrode with water, fertigation or treatments, unlike galvanized steel wire or cable.
Does it degrade in the sun in an open-field reservoir?
No. The monofilament is UV-stabilised and works from −40 °C to +90 °C, keeping its strength and tension through years of continuous exposure to the sun of Murcia, Almería or the Levante.
What gauge of wire is used for a reservoir grid?
For the main load-bearing lines the heavier calibres are used, 4 mm (breaking load 405 kgf) and 5 mm (616 kgf); for the secondary grid, 3 mm. We advise you according to the dimensions of your pond.
Is it suitable for large ponds and tanks?
Yes. Weighing about 5 times less than steel and tensioning with standard tools (Gripple®, tensioners), polyester makes it easier to cover large surfaces with less assembly effort and no rust points.