Complete Guide to Underground Water Tanks: Benefits, Installation, and Maintenance

Underground water tanks play a vital role in modern water management systems, providing a reliable source of water while conserving space above ground. These tanks are commonly used in both residential and commercial settings, offering a range of benefits that make them an attractive option for many. Whether you’re looking to install a new underground water tank or are seeking guidance on how to properly maintain the one you already have, this guide will provide valuable insights to help you make informed decisions.

In this guide, we’ll cover the importance of underground water tanks, the different types available, how to install them, and the best practices for maintenance. Our goal is to help you understand everything you need to know about underground water tanks and provide you with the tools necessary to keep your water tank functioning at its best.

1. What is an Underground Water Tank?

An underground water tank is a storage system that is buried beneath the ground and used to store water. These tanks are typically used for rainwater harvesting, water storage in homes or businesses, and emergency water supply. The tanks can vary in size, from small residential tanks to large commercial units, and they are constructed from different materials to meet various needs.

Types of Underground Water Tanks:

• Concrete Tanks: Concrete is the most common material for underground water tanks due to its durability and ability to withstand the weight of the surrounding soil. These tanks are resistant to corrosion, making them ideal for long-term use.

   

• Fiberglass Tanks: Fiberglass tanks are lighter and easier to install than concrete tanks, and they are resistant to rust. They are ideal for areas where space or weight is a concern.

   

• Steel Tanks: Steel underground tanks are highly durable and offer great strength, but they may be prone to corrosion if not properly coated.

   

Underground vs. Above-Ground Tanks:
The key difference between underground and above-ground water tanks lies in their placement. While above-ground tanks are installed above the ground level, taking up visible space, underground water tanks are hidden beneath the surface, saving space and preserving the aesthetics of the property.

2. Benefits of Underground Water Tanks

There are several advantages to choosing an underground water tank, which make them an appealing option for many property owners.

Space Saving: An underground water tank does not occupy any above-ground space, making it ideal for properties with limited room. This feature allows you to utilize the land for other purposes, such as gardening or creating recreational areas.

Aesthetic Appeal: One of the most significant benefits of an underground water tank is that it doesn’t interfere with the visual appeal of your property. Whether you have a landscaped garden or a well-maintained lawn, an underground tank remains hidden and doesn’t take away from your property’s beauty.

Safety & Protection: Underground water tanks offer protection from contaminants and temperature fluctuations. Being buried beneath the ground helps keep the water safe from external pollutants, dirt, and sunlight, ensuring that the stored water remains clean and safe for use.

Durability: Because underground tanks are protected from the elements, they tend to last longer than above-ground tanks. The soil around the tank acts as a natural shield against wear and tear caused by weather conditions like sunlight, heat, and rain.

Cost-Effectiveness: Although underground tanks may have higher initial installation costs, they often result in long-term savings due to their durability and lower maintenance needs. The protection from external elements reduces the frequency of repairs and replacements.

3. Key Considerations Before Installing an Underground Water Tank

Before installing an underground water tank, several factors must be taken into account to ensure a successful and efficient installation. These considerations will help you choose the right tank for your needs and avoid any potential issues down the road.

Site Assessment: The location of the tank is crucial. Factors such as soil type, proximity to water sources, and the area’s overall drainage system should be considered when choosing where to place your tank. Proper site assessment can prevent problems later on, such as groundwater seepage or soil erosion.

Capacity Requirements: The size of the tank should be based on the water usage needs of the property. Consider how much water you need to store and choose a tank with the appropriate capacity. If the tank is too small, it may not be able to meet your water needs, while an overly large tank could result in unnecessary expenses.

Soil Type and Water Table Level: The type of soil and the depth of the water table play a critical role in determining the suitability of the site for underground tank installation. Loose soil or high water tables may cause installation challenges or damage to the tank over time.

Accessibility for Maintenance: It’s important to ensure that the location of the underground water tank allows easy access for future maintenance. Regular upkeep is essential to keep your tank in good condition, so make sure you choose a spot that is not only convenient but also safe.

4. Step-by-Step Guide to Installing an Underground Water Tank

Installing an underground water tank requires careful planning and execution. Here’s a breakdown of the installation process:

Step 1: Planning and Design This phase involves calculating the size of the tank, the location of the installation, and the type of tank that best suits your needs. Proper design ensures the tank’s functionality and minimizes future problems.

Step 2: Excavation Process Excavation is the first physical step in the installation process. Depending on the size of the tank, heavy machinery may be needed to dig the hole. Excavating the site to the correct depth is essential to ensure the tank fits perfectly.

Step 3: Tank Placement The tank should be placed securely at the bottom of the excavation site. It must be level and properly aligned to prevent future shifting or damage.

Step 4: Piping and Connection The tank will need to be connected to plumbing systems for water inflow and outflow. This step ensures the water stored in the tank can be accessed when needed.

Step 5: Backfilling and Final Checks After the tank is securely in place and connected, the next step is backfilling, where the soil is replaced around the tank. Final checks are made to ensure that everything is secure and functioning properly.

5. Common Challenges During Underground Water Tank Installation

While installing an underground water tank can be highly beneficial, there are a few challenges that may arise.

Soil Instability: In some areas, loose or rocky soil may make excavation difficult and impact the stability of the tank. It’s essential to assess the soil condition and, if needed, take steps to stabilize it.

Waterproofing Issues: Leaks can occur if the tank is not properly waterproofed. Ensuring the tank is sealed correctly is vital for maintaining water quality and preventing water loss.

High Installation Costs: Underground tanks typically require more labor and equipment, which can increase installation costs. However, the long-term savings in maintenance and durability can make this initial investment worthwhile.

Regulatory Compliance: There are often local regulations that govern the installation of underground water tanks. Permits, inspections, and other legal considerations should be taken into account before beginning the installation process.

6. Regular Maintenance of Underground Water Tanks

To ensure your underground water tank remains functional and reliable, regular maintenance is essential. Here’s why maintaining your tank is so important:

Importance: Over time, contaminants such as debris, algae, and sediment can build up inside the tank, affecting water quality. It helps to remove these pollutants and maintain safe, clean water.

Types of Contaminants: Common contaminants include dirt, rust, algae, and bacteria. Each of these can have a negative impact on the water quality stored in the tank. Disinfecting the tank regularly can prevent these issues from becoming serious problems.

Frequency: It’s recommended to clean your underground water tank at least once every year. However, if you notice any changes in water quality or a buildup of debris, it’s best to clean the tank more frequently.

Maintenance Checklist:

• Inspect the tank regularly for cracks or damage

   

• Clean the tank annually

   

• Check for leaks and fix them immediately

   

• Ensure the piping system is functioning correctly

   

7. How to Clean an Underground Water Tank

Cleaning your underground water tank is a process that requires careful attention to detail. Here’s a step-by-step guide:

Step 1: Draining the Tank Before cleaning, drain all the water from the tank. Ensure that the area around the tank is properly prepared for any water runoff.

Step 2: Cleaning the Tank Interior Use a brush or pressure washer to scrub away any sludge, algae, or debris from the interior walls of the tank. This process may require removing any built-up sediment at the bottom of the tank.

Step 3: Disinfection After cleaning, it’s essential to disinfect the tank to kill any bacteria or remaining pathogens. Use a non-toxic disinfectant that is safe for water storage.

Step 4: Re-filling and Testing Once the tank has been thoroughly cleaned and disinfected, refill it with clean water and test the water quality to ensure it’s safe for use.

8. Common Water Tank Issues and Troubleshooting

Even with regular maintenance, underground water tanks can encounter issues. Some common problems and their solutions include:

Leaking Tanks: If you notice water pooling around your tank, it could indicate a leak. Check the tank for cracks or sealant issues, and repair them immediately.

Algae Growth: Algae can build up inside the tank if sunlight is able to penetrate. Make sure the tank is sealed tightly, or use an algae-preventing treatment to eliminate growth.

Clogged Pipes: Debris and sediment can block pipes, leading to a reduction in water flow. Regular cleaning of the pipes will prevent this from becoming a problem.

Water Contamination: Contaminated water can cause health issues. If contamination is suspected, drain and clean the tank and test the water quality to ensure it’s safe for consumption.

9. Tips for Extending the Life of Your Underground Water Tank

To get the most out of your underground water tank, follow these tips to extend its life:

Proper Insulation: Insulating the tank will help protect it from extreme temperatures and prevent damage to the tank material.

Routine Inspections: Regularly inspect your tank for any signs of wear and tear, and address issues early to prevent major damage.

Water Quality Testing: Test the water quality regularly to ensure it’s safe to use and free of contaminants.

While regular cleaning and maintenance can be done on your own, hiring a professional underground water tank cleaning service is an excellent option for ensuring your underground water tank remains in top condition.

Why Hire Professionals? Professionals have the right tools and experience to clean your tank thoroughly and efficiently. They can also identify potential issues before they become serious problems.

When to Book a Cleaning Service: Book a cleaning service if it’s been a year since the last cleaning, if you notice a change in water quality, or if there is visible debris in the tank.

How to Choose a Cleaning Service: When selecting a cleaning service, ensure that they are experienced, reputable, and provide proper certification. Always check reviews and ask for recommendations.

Conclusion

Underground water tanks are a valuable investment for homeowners and businesses alike. With the right installation, maintenance, and care, they can provide reliable water storage for many years. If you haven’t already, now is the perfect time to start thinking about the installation of an underground water tank or scheduling a cleaning for your existing tank. Keeping your tank well-maintained will ensure clean, safe water for years to come.