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Borehole Casing in Zimbabwe (Choosing Between Class 6 and Class 10)
In Zimbabwe, where access to clean water is critical, the selection of the right borehole casing is crucial for a safe and long-lasting well. This guide explains the difference between the two most common options—Class 6 and Class 10—and helps you decide which is best for your project.

What is Borehole Casing and Why Does It Matter?
A borehole casing is a pipe, typically made of durable PVC, that lines the drilled hole. It serves two critical functions: preventing the unstable walls from collapsing and protecting the water from surface contaminants. A high-quality casing ensures a borehole that lasts a lifetime by providing a stable housing for the pump and safeguarding your water quality.
Class 6 vs. Class 10: The Key Differences
Class 6 casing has a wall thickness of 1.5mm. It is the most common and cost-effective option in Zimbabwe, making it a popular choice for small-scale projects. However, it is only suitable for **shallow wells up to 100 meters** in stable ground conditions.
Class 10 casing has a thicker, more robust wall at 2.0mm. This makes it significantly more durable and resistant to the immense underground pressures and bending forces found in deeper wells. It is the professional standard for wells up to 250 meters deep or any borehole drilled in less stable geological areas.
Feature | Class 6 Casing | Class 10 Casing |
---|---|---|
Wall Thickness | 1.5mm | 2.0mm (Thicker & Stronger) |
Max Depth | Up to 100 meters | Up to 250 meters |
Durability | Standard | High (Superior collapse resistance) |
Cost | More affordable | Higher upfront cost |
Which Casing is Best for Your Borehole?
The choice of casing depends on your borehole's depth, the local geology, and your budget. While Class 6 casing may be suitable for a shallow well in stable ground, we believe in building systems that last. For this reason, Sona Solar Zimbabwe and our trusted partners strongly recommend Class 10 casing for most projects.
Although it has a higher upfront cost, its superior strength and durability make it a wiser long-term investment, protecting you from the costly and disruptive process of re-drilling a collapsed borehole.
Invest in a Borehole That Lasts
Choosing the right casing is essential for a safe and long-lasting well. Be sure to consult with a professional borehole drilling company to determine which casing is best for your project. At Sona Solar Zimbabwe, we provide expert guidance on every aspect of your water and energy system.
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