Investing in a borehole is a significant financial commitment. In Zimbabwe’s diverse geological landscape—stretching from the hard rock of the Mashonaland plateau to the sandy aquifers of Matabeleland—the "unseen" components of your well determine its lifespan.
At Nakiso Borehole Drilling, we believe an informed client is a protected client. While many contractors lead with the lowest price using Class 6 casings, we advocate for the structural integrity of Class 10 PVC casings. Here is a deep dive into the engineering, science, and economics behind that choice.
1. Understanding the Physics of Ground Pressure
A borehole is essentially a vertical straw into the earth. Once the drilling rig leaves, that straw is the only thing preventing the surrounding earth from reclaiming the space.
Wall Thickness & SDR: Class 10 casings feature a 10mm wall thickness. In engineering terms, this provides a much higher collapse resistance rating.
Soil Movement: Earth is not static. Moisture changes, seismic tremors, and heavy machinery operating nearby cause the ground to shift. A thinner Class 6 pipe can "ovalize" (lose its round shape) or buckle under this lateral pressure.
The Chain Reaction: Once a casing buckles, your submersible pump can become trapped, or the hole can silt up, rendering the entire investment useless. Class 10 provides the rigid spine needed to stay perfectly circular for decades.
2. The Science of Virgin vs. Recycled Materials
Not all PVC is created equal. The "Class" of a pipe doesn't just refer to its thickness, but often to the quality of the resin used in manufacturing.
Virgin PVC (Class 10): This material is "first-use" plastic. It possesses maximum molecular bonding, which translates to high tensile strength and impact resistance. It can flex slightly without snapping.
Recycled PVC (Common in Class 6): Many lower-grade pipes are made from "regrind" or recycled plastics. These often contain microscopic impurities or "stress concentrators." Over 5 to 10 years, these impurities can lead to Environmental Stress Cracking (ESC).
Chemical Stability: Virgin material is inert. It does not leach chemicals into your drinking water and is highly resistant to the corrosive minerals often found in Zimbabwean groundwater.
3. Engineering Partnerships: Proplastics & Driptech
Quality is only as good as the factory that produces it. By sourcing Class 10 casings from industry leaders like Proplastics and Driptech, Nakiso ensures:
Standardization: Every pipe is manufactured to international ISO and SAZ (Standards Association of Zimbabwe) specifications.
Precision Threading: Lower-quality casings often have poorly cut threads that can cross-thread or leak during installation. Our partners provide precision-machined joints that ensure a watertight, structural seal from the surface to the aquifer.
4. The "False Economy" of Cheap Casings
It is tempting to save $200–$400 on a project by opting for Class 6. However, consider the Total Cost of Ownership:
| Feature | Class 6 Casing | Class 10 Casing |
| Material | Often Recycled/Lower Grade | 100% Virgin PVC |
| Wall Thickness | Approx. 6mm | 10mm (High Density) |
| Lifespan | 5–15 Years (Risk of Collapse) | 50+ Years (Lifetime) |
| Risk Factor | High (Buckling/Cracking) | Minimal (Structural Shield) |
| Value | Cheap Upfront | Highest ROI & Asset Value |
If a Class 6 borehole collapses after 7 years, you lose the drilling fee, the casing cost, and potentially a $1,000+ pump. A Class 10 borehole is a permanent improvement to your property's value.
Our Commitment to Zimbabwe’s Water Security
At Nakiso Borehole Drilling, we don't just "poke holes" in the ground. We engineer sustainable water systems. By insisting on Class 10 casings, we are protecting your family's health, your farm's productivity, and your business's continuity.
Don't gamble with your water. Choose the shield that lasts a lifetime.
Contact Nakiso Borehole Drilling for a Technical Consultation:
Get In Touch
Nakiso Sales WhatsApp
Sales Hotline
+263 716 047 257 | +263 71 604 7236
+263 788 608 005 | +263 77 847 4902
Visit Us
Head Office
55 Churchill Avenue, Alexandra Park, Harare, Zimbabwe
Lomagundi Branch
36 St Athans Drive, Bluff Hill, Harare, Zimbabwe
About Nakiso Borehole Drilling
At Nakiso Borehole Drilling, we are your comprehensive partner for unlocking reliable water on your property. Our highly skilled team tackles all drilling projects, from standard boreholes to specialized Blast Hole and RC Drilling.
We handle everything in-house for a seamless experience, encompassing expert borehole siting, efficient drilling, and pump installation – solar, electric, or manual – tailored to your specific needs. With Nakiso, your reliable water source is just a drill away.
We don't just strive to be the best; we maintain the industry's strictest quality standards and are committed to sustainable practices for the future of Zimbabwe's water security.
Fact 1: Know Your Borehole Casings
The Preferred Borehole Casing In Zimbabwe Is Class 9 and 10 (Pressure Classes.)
This is because Class 9 and Class 10 Casings are more collapse resistant. The strength of a Casing is often described as collapse resistance.
Fact 2: Borehole Drilling Depth
The exact depth, of where the water is located, cannot be established by the drilling contractor nor the Water Surveyor (Borehole Siter).
Fact 3: There Is No 100% Guarantee
It is important to note that it is never a 100% guarantee that any hole will yield water, the amount and water quality can also not be guaranteed by the drilling contractor and water surveyor.
Fact 4: Siting Is Important
Making use of a hydrologist or traditional water diviner will increase your chances of having a successful borehole that will yield a sufficient amount of water.
Fact 5: Know The Risks
The risk of the borehole drilling lies with the property owner. The client will still be liable for the drilling costs irrespective of a borehole yielding water or not.
Our Branches and Our Contacts
Churchill Ave Branch
Business Offices (HQ):55 Churchill Avenue,
Alexandra Park,
Harare North,
Zimbabwe.
Call Us Today:
Office Numbers: +263 867 71 88844
Sales: +263 78 860 8009
Operations: +263 78 860 8005
Marketing: +263 78 876 6701
Email: info@nakisoboreholes.co.zw
Website: www.nakisoboreholes.co.zw
Bluff Hill Branch
Business Offices:36 St. Anthans Drive,
Bluff Hill,
Harare,
Zimbabwe.
Call Us Today:
Office Numbers: +263 71 494 0883
Sales: +263 78 860 8009
Operations: +263 78 860 8005
Marketing: +263 78 876 6701
Email: info@nakisoboreholes.co.zw
Website: www.nakisoboreholes.co.zw
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