Can Dripline Be Used on Uneven or Sloped Ground?
One of the most common questions we get is whether dripline irrigation can be used on sloped or uneven land. The answer is yes — but the type of dripline you choose makes all the difference.
Understanding the Difference Between Non-PC and PC Dripline
There are two main types of dripline systems — Non-Pressure Compensating (Non-PC) and Pressure Compensating (PC). Each serves a specific purpose based on your terrain and pressure conditions.
1. Non-Pressure Compensating (Non-PC) Dripline
Non-PC dripline is designed for flat, even ground where water pressure remains consistent across the lateral. Because the flow rate depends directly on line pressure, changes in elevation can cause uneven water output.
- Best for: Flat and even terrain.
- Not recommended for: Slopes or hills where gravity affects pressure.
- Important: Always install within the manufacturer’s maximum lateral length to maintain even flow.
2. Pressure Compensating (PC) Dripline
PC dripline contains special diaphragms inside each emitter that maintain a constant flow rate, even when pressure changes due to elevation or longer line runs. This makes it ideal for uneven or sloped terrain.
- Best for: Sloped, hilly, or uneven areas.
- Flow remains consistent: Emitters adjust automatically to pressure differences.
- Still subject to: Maximum lateral length limits — always follow your design plan.
Why Pressure Compensating (PC) Dripline Works on Slopes
On sloped ground, gravity increases pressure in the lower sections of a dripline and decreases it in the higher sections. This often results in overwatering at the bottom and underwatering at the top — unless you use PC dripline.
Because PC emitters automatically regulate flow, every plant receives the same amount of water regardless of elevation. This ensures consistent crop growth, balanced soil moisture, and efficient water use even on irregular terrain.
Design Considerations for Sloped Ground
- Install dripline along the contour of the slope to promote even water distribution.
- Use proper filtration to prevent emitter blockage — especially at low points where sediment collects.
- Keep line lengths within the manufacturer’s maximum lateral length recommendations.
- Use pressure regulators to maintain stable inlet pressure for the entire zone.
With correct system design and quality manufacturing, dripline irrigation performs exceptionally well on uneven land — conserving water while ensuring every plant thrives.
Final Thoughts
Non-PC dripline is an excellent, cost-effective solution for flat ground where pressure remains stable. PC dripline, on the other hand, is the right choice for slopes or varying elevations, providing consistent water flow across the entire field or garden.
At Afriq Water, we manufacture both Non-PC and Pressure Compensating (PC) driplines locally — engineered to suit South Africa’s diverse terrain and water conditions.
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/
