When considering the purchase of water tanks for residential, commercial, or industrial use, it’s important to be aware of the general price range for each product type. Below are the average prices of various water tank sizes and materials based on current market trends. Keep in mind that these prices are for the tank itself and do not include installation costs or additional services like pumps, filtration systems, or maintenance.
1. Polyethylene (Plastic) Tanks
- Small Tanks (Up to 1000 Liters):
- Price Range: R1,000 – R2,500
- These are commonly used for smaller households or for rainwater harvesting for non-potable uses such as irrigation.
- Medium Tanks (1000 – 5000 Liters):
- Price Range: R2,500 – R8,000
- These tanks are ideal for typical households and are used for both potable and non-potable water storage.
- Large Tanks (5000 – 10,000 Liters):
- Price Range: R8,000 – R15,000
- Large tanks are suited for larger homes, agricultural purposes, or commercial use where higher water demand is needed.
- Extra-Large Tanks (Above 10,000 Liters):
- Price Range: R15,000 – R25,000
- These are typically used for commercial, industrial, or large-scale agricultural applications.

2. Steel Tanks
- Small Tanks (Up to 1000 Liters):
- Price Range: R3,500 – R6,000
- Steel tanks are more durable and are ideal for those who need a longer-lasting solution for their water storage needs.
- Medium Tanks (1000 – 5000 Liters):
- Price Range: R6,000 – R15,000
- Steel tanks provide additional strength and are often used for both residential and small industrial purposes.
- Large Tanks (5000 – 10,000 Liters):
- Price Range: R15,000 – R30,000
- Larger steel tanks are used for significant water storage, especially in industrial and commercial settings.
- Extra-Large Tanks (Above 10,000 Liters):
- Price Range: R30,000 – R50,000
- These tanks are typically used for large-scale industrial and agricultural water storage needs.

3. Concrete Tanks
- Small Tanks (Up to 1000 Liters):
- Price Range: R4,000 – R8,000
- Concrete tanks are designed for durability and are ideal for properties with specific needs.
- Medium Tanks (1000 – 5000 Liters):
- Price Range: R8,000 – R18,000
- These tanks are long-lasting and well-suited for both residential and commercial use.
- Large Tanks (5000 – 10,000 Liters):
- Price Range: R18,000 – R40,000
- Large concrete tanks are used in high-demand areas where water storage is essential for business or agricultural use.
- Extra-Large Tanks (Above 10,000 Liters):
- Price Range: R40,000 – R70,000
- These are typically permanent fixtures and are most often used in large industrial or agricultural operations.

Additional Factors Affecting Water Tank Prices
The price of water tanks can vary based on several factors, such as:
- Material Quality: Higher-quality materials often cost more but offer greater durability.
- Brand: Established brands tend to come at a premium due to their reputation for reliability and longevity.
- Location: Delivery costs and location can affect the final price of a water tank.
- Additional Features: Some tanks come with extra features, such as UV protection, specialized coatings, or included accessories like taps, pumps, and filters, which may increase the cost.
Conclusion
When choosing a water tank, it’s crucial to factor in your specific water storage needs, budget, and the material you prefer. Whether you opt for a small polyethylene tank for your garden, a large steel tank for your household, or an extra-large concrete tank for industrial purposes, you’ll find a wide range of options suited to your requirements.
For expert advice and professional installation, contact Rob Millar Plumbers today. Our team is ready to guide you through the selection process and provide top-notch installation services for water tanks of all sizes.