A dependable water supply is more than just a convenience—it’s a critical resource. Whether preparing for the dry season, aiming to cut down on your water bills, or simply seeking a sustainable solution, installing a large water tank could be the game-changer you need.
However, before you dive into this hefty project, it’s crucial to understand the steps involved. On top of that, you also need to know the challenges you might face and why bringing in professionals could save you a world of trouble.
With careful planning and expert guidance, your large water tank can become a reliable asset for years to come.
Assessing Your Needs
Before installing a large water tank, it’s essential to assess your specific requirements thoroughly. This step ensures the tank you choose meets your needs effectively and efficiently.
Such a process involves several considerations to ensure the tank’s functionality, accessibility, and compliance with local regulations. Here’s what you need to do:
1. Determine the Appropriate Tank Size
Begin by evaluating your water requirements that reflect on the tank size. For example:
- Property Usage: Estimate daily water consumption for all purposes, including drinking, cooking, cleaning, and irrigation. A typical household might need a smaller tank than a farm or industrial operation.
- Agricultural or Commercial Usage: Larger operations will require more significant storage. Therefore, you need to consider peak usage times, seasonal variations, and potential future expansions.
- Backup Supply: If the tank is intended as a backup supply during shortages or emergencies, factor in how long you need the reserve to last.
2. Site Location and Environmental Factors
The location where the tank will go plays a crucial role in its effectiveness and longevity. Consider the following:

- Elevation: Placing the tank on higher ground can improve water pressure naturally.
- Proximity to Water Sources: If the tank’s job is to collect rainwater, positioning it close to catchment areas, like roofs, is ideal. Principally, strategic placement can simplify plumbing connections and improve overall functionality.
- Space Availability: Ensure the site has enough space not only for the tank itself but also for installation equipment and future maintenance access. For large tanks, a clear area of at least a few metres around is recommended to facilitate easy access.
- Property Layout: If you have limited space, explore options like underground tanks to maximise your available installation area. Plus, if you have multiple areas on your property, map out all potential locations to help identify the best spot for installation.
- Environmental Impact: Evaluate the potential impact on local ecosystems and ensure that the site chosen doesn’t contribute to soil erosion or other environmental issues.
3. Understanding Local Regulations and Permits
Compliance with local regulations is non-negotiable for a smooth installation process. So, before moving forward, make sure to check local building codes and regulations regarding water tank installation.
- Zoning Laws: Check if your area has specific zoning laws restricting tank size or placement.
- Building Permits: Determine whether you need permits for the tank installation, particularly if it involves significant excavation or structural work.
- Health and Safety Standards: Ensure that your tank meets all health and safety standards, especially if it will store drinking water.
Choosing the Right Water Storage Tank
Selecting the right tank is crucial to ensuring that your water storage system is efficient, durable, and suitable for your needs. With various options available, it’s important to understand the differences between tank types, materials, and their respective benefits and drawbacks.
1. Types of Water Tanks
Water tanks come in several shapes and designs, each suited for different applications:

- Vertical Tanks: These are the most common for residential and commercial use, offering a compact footprint and significant storage capacity.
- Horizontal Tanks: Ideal for areas with height restrictions or limited spaces, these tanks are typically used in agricultural or industrial settings.
- Underground Tanks: If space is a concern, underground water storage tanks offer large storage without taking up visible space. They’re also less susceptible to temperature fluctuations but can be more expensive to install and maintain.
- Modular Tanks: For those needing flexibility, modular tanks can be expanded as needed. They’re commonly used in large commercial or agricultural settings where water needs may change over time.
2. Pros and Cons of Various Tank Materials
The material of the tank plays a significant role in its durability, maintenance, and suitability for your specific environment.
- Plastic (Polyethylene): These tanks are lightweight, corrosion-resistant, and relatively inexpensive. They’re suitable for both above-ground and below-ground installations. Yet, if not properly protected, they may degrade over time when exposed to UV light.
- Steel Tanks: Known for its strength and durability, this material is ideal for above-ground installations. Generally, steel tanks can be galvanised to prevent rust but are heavier and more expensive than plastic tanks.
- Concrete Tanks: They’re extremely durable and suitable for both above-ground and underground use. They’re also resistant to fire, pests, and extreme weather. Yet, they’re heavy, costly to install, and may require periodic maintenance to prevent cracking.
- Fibreglass Tanks: These tanks are lightweight, corrosion-resistant, and suitable for both above-ground and underground installations. They offer a longer lifespan than plastic but can have a higher upfront cost.
3. Considerations for Durability and Long-Term Maintenance
When choosing your tank, consider how long it will last and what maintenance it might require.
- UV Protection: If you’re considering an above-ground tank, ensure it has adequate UV protection to prevent material degradation. This is particularly important for plastic tanks.
- Corrosion Resistance: For steel and metal tanks, look for options that are treated to resist rust and corrosion. That’s especially true if the water is slightly acidic or if the tank will be exposed to harsh environmental conditions.
- Maintenance Accessibility: Choose a tank design that allows for easy access to perform routine inspections, cleaning, and repairs. Look for tanks with built-in inspection hatches or removable lids.
- Warranty and Support: Consider the manufacturer’s warranty and the availability of customer support. In most cases, a longer warranty often indicates confidence in the tank’s durability.
4. Budget and Cost
Establish a budget for your water tank project. You need to not only factor in the tank’s purchase price but also installation costs, necessary accessories (such as pumps and filters), and ongoing maintenance.
While it may be tempting to choose cheaper options, investing in a quality tank can save money in the long run by reducing replacement and repair costs.
An Overview of the Installation Process
Installing a large water tank involves several key steps to ensure a successful and efficient setup. Check out the following overview of the installation process:
1. Site Preparation
Before installation begins, preparing the site thoroughly is essential for a stable and functional water tank setup. This includes clearing and levelling the site as well as establishing a stable foundation. Take a look at a few helpful tips for this step:
- Choose a location that is accessible for tank delivery and maintenance.
- Ensure the area is free of debris, trees, and other obstacles.
- Clear the area of vegetation and any loose material.
- Depending on the tank size and type, you might need to excavate the site to create a level foundation.
- Use a levelling tool to ensure the ground is even. An uneven base can lead to instability and potential damage to the tank.
- For above-ground tanks, a concrete slab is commonly used as a foundation. Pour and cure a concrete slab slightly larger than the tank’s footprint to provide a stable and level base.
- Alternatively, a compacted gravel or crushed stone base can be used. Ensure the base is well-compacted to prevent settling.
2. Tank Delivery and Placement
Once the site is ready, the next step involves bringing the tank to its designated location and positioning it correctly. Check out how it should go:
- Arrange for the tank to be delivered when the site is fully prepared and ready for installation.
- Ensure the delivery truck has adequate access to the site. Consider using cranes or lifting equipment if the tank is particularly large or heavy.
- Position the tank according to the planned layout. For above-ground tanks, ensure it’s placed on the prepared foundation. For underground tanks, lower the tank into the excavation site carefully.
- Check that the tank is level and properly aligned with any plumbing connections. Adjust as necessary to ensure stability.

3. Plumbing and Connections
With the tank in place, the next step is to establish all necessary plumbing connections to ensure efficient water flow and management. Here are the key steps to follow:
- Install the inlet pipe to connect the tank to your water source.
- Similarly, set up the outlet pipe for distribution.
- Ensure all connections are secure and leak-proof.
- If necessary, install any filtration or treatment systems to ensure water quality.
- Install an overflow pipe to direct excess water away from the tank and prevent flooding. This pipe should be positioned above the maximum water level of the tank.
- Set up a drainage system around the tank to manage runoff and prevent water accumulation around the base.
4. Filling and Testing
The final step before the tank is fully operational involves testing to ensure everything is working correctly and there are no leaks. Typically, you need to:
- Begin filling the tank slowly to prevent sudden pressure changes that could damage the tank or its connections.
- Monitor the tank for any signs of leaks or issues.
- As the tank fills, check all connections, joints, and valves to ensure they are functioning properly and free from leaks.
- Once the tank is full, perform a pressure test to ensure the tank and all connections are secure and functioning as intended.
- Verify that all components, such as pumps, filters, and valves, are operating correctly.
- Make any necessary adjustments or repairs.
5. Final Steps
After the tank is filled and tested, completing the final touches ensures the system is secure and ready for long-term use.
So, if the tank is above ground, secure it to prevent tipping or movement. This might involve anchoring it to the foundation or using stabilising supports. After that, install any required covers or lids to protect the tank from debris and contamination.
That said, it’s essential to keep inspection records for future reference. Therefore, make sure to document the installation process, including any inspections or tests performed. You also need to keep records of warranties and maintenance schedules.
Common Challenges During Installation
Installing a large water tank presents several challenges that can impact the success of the project if not properly addressed. These include:
- Site Preparation Issues: Uneven ground or inadequate space can lead to installation difficulties. Ensuring a stable, level foundation is critical to preventing tank instability.
- Access and Manoeuvring: Delivering and positioning a large tank can be complicated. Limited access or obstacles can delay installation and increase costs.
- Plumbing and Connections: Properly connecting the tank to water sources and ensuring leak-proof seals can be complex. Incorrect connections can lead to leaks or system failures.
- Regulatory Compliance: Navigating local building codes and obtaining necessary permits can be challenging. Non-compliance can result in fines or delays.
Why Professional Installation Is Recommended
Installing a water storage tank isn’t a DIY project, especially when dealing with the large kinds. For a successful tank setup, professional installation is a must because:
- Professionals have the technical knowledge to handle site preparation, positioning, and plumbing with precision, reducing the risk of errors.
- They’re familiar with local codes and can manage permits and inspections, ensuring the installation meets all legal requirements.
- Experienced installers use proper techniques and safety measures, minimising risks and ensuring the tank functions correctly.
- Professional installation often includes warranty protection and insurance coverage, offering peace of mind and protecting against unexpected costs.
Final Thoughts
Installing a large water tank offers significant benefits, from ensuring a steady water supply to cutting long-term costs. The process involves many, sometimes complicated, steps, depending on the tank size and type.
Primarily, the complexity of the installation process makes professional expertise crucial. You need a skilled worker to handle site preparation, comply with regulations, and ensure safety and efficiency.
As such, investing in professional installation ensures your tank operates reliably and effectively for years to come, providing you with peace of mind and optimal performance.