Pressure Compensating vs Non-PC Dripline

What Are the Differences Between Pressure Compensating and Non-Pressure Compensating Dripline?

When choosing dripline irrigation, one of the most important decisions is whether to use Pressure Compensating (PC) or Non-Pressure Compensating (Non-PC) dripline. Both are effective — but they perform differently depending on your terrain, water pressure, and crop layout.

“The main difference comes down to consistency — PC dripline delivers the same amount of water no matter where it’s installed, while Non-PC does not.”

What Is Pressure Compensating (PC) Dripline?

PC dripline contains small silicone diaphragms inside each emitter that automatically adjust to pressure changes along the pipe. This means that whether the emitter is at the start or the end of a row — or even on a slope — it releases the same flow rate of water.

Consistent output: Equal water distribution across the entire field.
Ideal for uneven or sloped land: Pressure compensation corrects for gravity and friction loss.
Longer laterals: Can run longer rows without uneven flow issues.

PC dripline is slightly more expensive, but it’s the right choice for professional or permanent irrigation systems, especially when you’re working with varied terrain or large fields.

What Is Non-Pressure Compensating (Non-PC) Dripline?

Non-PC dripline has a simpler design — it relies purely on the emitter’s flow path to regulate water output (specifically at 1 BAR). As a result, it performs best in flat, even fields where water pressure is consistent throughout the line.

Cost-effective: More affordable than PC dripline.
Best for level ground: Works perfectly in tunnel systems, nurseries, or flat vegetable fields.
Easy to install: Lightweight and simple to maintain.

Afriq Water Tip: Non-PC dripline should always be used within its maximum recommended lateral length. Beyond that, pressure drop can cause uneven watering at the far ends of your rows.

Key Differences Between PC and Non-PC Dripline

Flow consistency: PC dripline maintains a steady flow regardless of pressure changes, while Non-PC flow decreases with distance.
Terrain compatibility: PC works best on slopes or uneven ground; Non-PC works best on flat terrain.
Emitter design: PC has built-in diaphragms; Non-PC uses labyrinth channels only.
Cost and longevity: PC is more expensive but offers long-term performance in challenging conditions.

Which Type Should You Choose?

Choosing between PC and Non-PC dripline depends on your crop, field layout, and pressure conditions:

Flat ground: Choose Non-Pressure Compensating dripline for affordability and simplicity.
Sloped or uneven land: Choose Pressure Compensating dripline for uniform performance.
Buried systems: Only Anti-Syphon PC dripline (available by special order) is suitable for underground installation.

“At Afriq Water, we manufacture both PC and Non-PC dripline — because the right choice depends on your field, not your budget.”

Where to Find Dripline Irrigation in South Africa

Our Afriq Drip range is proudly manufactured in South Africa, offering reliable, value-for-money irrigation solutions for farms of all sizes.

You can find our dripline rolls and fittings at most agricultural Co-Ops and irrigation suppliers across the country. Stock availability may vary, as we manufacture to order, so please allow 2–3 weeks lead time.

Prefer to buy online? Visit:
www.irrigationonlinesa.co.za

Or contact our distributor to find your nearest retailer:
www.iunlimited.co.za/contact/