Choosing the right pipe is the foundation of a reliable and efficient automatic irrigation system. The pipe type determines allowable pressure, friction losses, durability, and installation cost. In this article we compare the three main pipe types used in irrigation.
Why pipe choice matters
Pipes are the arteries of your irrigation system. The wrong choice leads to:
- Pressure loss — too-small diameter or rough interior walls reduce pressure at the nozzles
- Leaks — poor connections or exceeding the pressure rating destroy the system
- Overspending — oversized pipe costs more and is harder to install
PE pipe (high-density polyethylene, HDPE)
The most popular choice for residential irrigation. Flexible, lightweight, and easy to install.
- Diameters: 25 mm (3/4"), 32 mm (1"), 40 mm (1-1/4")
- Pressure rating: PN6–PN10 (6–10 bar / 87–145 PSI)
- UV resistance: high (black with protective layer)
- Fittings: compression (no glue, reusable)
- Price: ~EUR 0.50–1.50/m depending on diameter
- Installation: cut with shears, hand-tighten or wrench
Best for: lateral lines to sprinklers, valve connections, small mainlines.
PVC pipe (polyvinyl chloride)
Rigid pipe with higher flow capacity. The standard for mainlines in commercial systems.
- Diameters: 32 mm, 40 mm, 50 mm, 63 mm
- Pressure rating: PN10–PN16 (10–16 bar / 145–232 PSI)
- UV resistance: low (must be buried)
- Fittings: solvent-welded (permanent)
- Price: ~EUR 0.80–2.00/m
- Installation: cut with hacksaw, join with solvent cement
Best for: mainlines, long runs, commercial sites with high pressure.
Poly pipe (LDPE — low-density polyethylene)
Very flexible, small-diameter tubing for drip irrigation and micro-spray systems.
- Diameters: 16 mm, 20 mm, 25 mm
- Pressure rating: PN4–PN6 (4–6 bar / 58–87 PSI)
- Fittings: barbed or quick-connect
- Price: ~EUR 0.20–0.60/m
Best for: drip lines, micro-irrigation for beds and gardens, connecting drip tape.
Comparison table
| Parameter | PE (HDPE) | PVC | Poly (LDPE) |
|---|---|---|---|
| Flexibility | Medium | Rigid | High |
| Pressure | 6–10 bar | 10–16 bar | 4–6 bar |
| UV resistance | High | Low | Medium |
| Price (EUR/m) | 0.50–1.50 | 0.80–2.00 | 0.20–0.60 |
| Installation | Easy | Medium | Very easy |
Which pipe to choose?
- Lateral lines to sprinklers: PE 25 mm — flexible, easy to lay in trenches
- Main supply line: PVC 40–50 mm or PE 32 mm — minimal pressure loss
- Drip zones: LDPE 16–20 mm — ideal for micro-irrigation
Size your pipes in SmartPluvia
Our online planner automatically sizes pipes based on flow rate and run length to minimize pressure loss. Try it for free! For drip irrigation, consider Netafim — the world leader from Israel (since 1965). Standard Generic PE/PVC pipes and fittings are a budget-friendly option for most systems.