The pressure-compensating drip irrigation hose is offered in two configurations that differ only in emitter spacing: 30 cm and 50 cm, both in 500 m rolls with a 16 mm diameter, 1.0 mm wall thickness (Cal. 4000), and a nominal flow rate of 1.6 L/h. The key feature that distinguishes it from standard hose is the pressure-compensating dripper: it maintains a constant flow rate over a wide range of pressures, allowing for uniformity on sloped terrain or very long laterals. The choice between 30 and 50 cm defines the number of drippers and the total flow rate of the system.
🎯 Choose your variant in 10 seconds
- If your case is vegetables or row crops with plants every 30–40 cm on a slope: go to the 30 cm emitter spacing configuration
- If your case is fruit trees, ornamentals, or very long laterals in sloped plots: go to the 50 cm emitter spacing configuration
What to consider before choosing a variant
Both variants share the same material, diameter (16 mm), wall thickness (1.0 mm), nominal flow rate (1.6 L/h), working pressure (3.0 bar), and roll format (500 m). The difference is only in the emitter spacing and, consequently, in the number of emitters and the total flow rate. Here are the criteria for making the right choice:
- When pressure compensation is recommended: on plots with elevation changes (slopes greater than 2%), very long laterals, or systems experiencing pressure variations due to group pumping. The pressure-compensating emitter maintains a constant flow rate despite local pressure changes, ensuring uniform discharge along the entire lateral.
- Crop spacing: for row crops with plants every 30 cm (tomato, pepper), the 30 cm option places an emitter next to each plant. For fruit trees, young banana plantations, or ornamentals with plants every 50–100 cm, the 50 cm option distributes water better without over-supplying.
- Total system flow rate: the 30 cm roll has 1,666 emitters and releases approximately 2,666 L/h; the 50 cm roll has 1,000 emitters and releases 1,600 L/h. If your pump capacity is limited, the 50 cm option allows for expanding the irrigation area per cycle.
- Capacity for long laterals: the pressure-compensating property allows for significantly longer laterals than standard hose at the same pressure. For long plots, sloped lines, or greenhouses with extensive aisles, this property is the main reason to choose pressure-compensating hose.
- Filtration and maintenance: the pressure-compensating emitter is more sensitive to particles than a simple turbulent labyrinth emitter because it incorporates a flexible membrane. Adequate filtration at the head unit (at least 120 mesh, 130 micron) is essential to preserve the system's lifespan.
30 cm emitter spacing configuration: the close spacing for sloped vegetable plots
- 1,666 emitters per roll: uniform coverage
- Identical flow rate at the top and bottom of the lateral
- 1 mm wall: durable for permanent use
- Compensates for system pressure variations
- High total flow rate: ≈2,666 L/h per roll
- Oversized for spaced fruit trees
- More sensitive to fine particles: 120 mesh filter mandatory
The 30 cm configuration is the standard option for row crops when the terrain has elevation changes or when uniformity is critical: tomatoes, peppers, eggplants, cabbage. Where a standard hose would leave the emitters at the end discharging less due to pressure loss, the pressure-compensating hose maintains a steady 1.6 L/h from the first to the last emitter, regardless of whether the lateral goes up a hill or down a slope. This is the choice for farms with irregular topography, where a standard hose would create areas of under or over-irrigation.
50 cm emitter spacing configuration: the wider spacing for fruit trees and long laterals
- Lower total flow rate: ≈1,600 L/h per roll
- Allows for very long laterals without losing uniformity
- Ideal for large plots with elevation changes
- Reduces pumping demand
- Insufficient for tightly spaced row vegetables
- Risk of dry zones if crop is dense
The 50 cm configuration is the option for spaced plantations on sloped plots or long laterals: young bananas, papayas, citrus in plantations, linear ornamental beds, palm trees. Its 1,000 emitters reduce the total water demand to 1,600 L/h, which allows for irrigating large areas with a single main line and a moderate head unit. Combined with pressure compensation, it is the most efficient choice for extensive farms with varying topography.
Variant comparison table
The two variants share all construction and emitter characteristics. The difference is only in the spacing and, therefore, in the number of emitters and the total system flow rate.
| Feature | 30 cm emitter spacing | 50 cm emitter spacing |
|---|---|---|
| Ideal use | Sloped vegetable plots | Fruit trees and long laterals |
| SKU | 967456 | 945623 |
| Emitter type | Pressure-compensating | Pressure-compensating |
| Diameter | 16 mm (5/8 in) | 16 mm (5/8 in) |
| Wall thickness | 1.0 mm (Cal. 4000) | 1.0 mm (Cal. 4000) |
| Emitter spacing | 30 cm (12 in) | 50 cm (20 in) |
| Nominal flow rate | 1.6 L/h (0.42 gph) | 1.6 L/h (0.42 gph) |
| Emitters per roll | 1,666 | 1,000 |
| Total flow rate of roll (estimated) | ≈2,666 L/h | ≈1,600 L/h |
| Working pressure | 3.0 bar (43.5 psi) | 3.0 bar (43.5 psi) |
| Roll length | 500 m (1640 ft) | 500 m (1640 ft) |
Use case matrix → recommended variant
| If your case is… | Recommended variant |
|---|---|
| Tomatoes or peppers in a sloped plot | → 30 cm |
| Row vegetables with critical uniformity | → 30 cm |
| System with group pumping and pressure variations | → 30 cm |
| Bananas, papayas, citrus in a plantation with a slope | → 50 cm |
| Long aisles in fruit orchards or palm groves | → 50 cm |
| Ornamental beds in an elongated plot | → 50 cm |
Pressure-compensating hose justifies its price in three specific situations: plots with slopes or elevation changes greater than 2%, laterals exceeding the maximum length of standard hose, and systems with group pumping where multiple lines share a header and pressure varies when cycles are activated. If your plot is flat, laterals are short, and you have a single pumping group, the standard drip irrigation hose delivers similar results for less cost. Only pay for pressure-compensating hose when your system's geometry or hydraulics justify it.
Do not install pressure-compensating hose with pressure below the emitter's activation threshold. These emitters need a minimum pressure to start regulating flow; below that pressure, they discharge little or nothing. If your system operates at low pressure due to gravity or a shallow well, check the operating range with the manufacturer and, if necessary, install an auxiliary pump. Without sufficient pressure, pressure compensation will not activate, and the system will perform worse than a standard hose.
30 or 50 cm for your plot?
Tell us what you are going to grow, plant spacing, lateral length, terrain slope, and available flow rate. You will receive the exact configuration and confirmation of whether pressure-compensating dripline is truly necessary for your case.
Frequently asked questions
What is the real advantage of pressure-compensating vs. standard?
Pressure-compensating dripline maintains a constant flow rate despite pressure variations along the lateral or the system. In a standard dripline, the emitters at the end discharge less due to accumulated pressure loss. Pressure-compensating dripline eliminates this difference, resulting in superior uniformity and, in high-value crops, higher yields due to irrigation uniformity.
Can I combine standard and pressure-compensating dripline on the same plot?
Yes, this is a common practice when a farm has flat areas and sloped areas. Use standard dripline in flat sections with short laterals (more economical) and pressure-compensating dripline in sloped sections or long laterals (critical uniformity). Both can share a filtration head and valves as long as the operating pressures of each section are respected and regulators are used at the inlet of each zone if the overall pressure is high.
Does it require a special filter?
Yes, like standard dripline, it requires at least 120 mesh (130 micron) filter, but the pressure-compensating emitter is somewhat more sensitive due to its internal flexible diaphragm. In well water with high fine content, it is advisable to combine a mesh filter with a sand filter at the head unit. Keeping the filter clean prevents the diaphragm from getting dirty and extends the system's lifespan.