Concrete Underground Water Storage Tanks: A Better Alternative
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A Better Alternative to Concrete Underground Water Storage Tanks

Municipalities don’t always provide adequate water throughout the day, so a water storage tank that can give you a continuous supply of water is now essential for many households. Water tanks have become increasingly important, especially in rural areas where people might not have 24/7 access to water. 

The tanks most readily available on the market are concrete, fiberglass and plastic. Many homeowners choose concrete, but is that the best option? This article will discuss better alternatives to concrete for underground water storage.

What Are Concrete Underground Water Storage Tanks and Why Are They a Poor Option?

Precast underground concrete water storage tanks are a popular option for many homeowners and businesses. They offer some advantages, including a low price compared with other options. However, concrete is a poor choice for an underground water storage tank for several reasons:

Yes, concrete is a sturdy material — but it's also heavy. This can complicate and increase the cost of transportation and installation. Installers will need to use machinery to lift the tank into the desired location.

Plus, as concrete ages, it becomes more susceptible to cracks and erosion. This is because of its porous composition and because concrete slabs are often made from pieces poured at different times, creating more opportunities for cracks. Once concrete begins to degrade, it causes a series of problems — including leaks — that are difficult and expensive to fix. 

Concrete tank leaks are not easy to repair, especially when it’s buried underground. Repairers may need to dig through the ground to reach the source of the leak, as the tank cannot be lifted out for fixing. 

For these reasons, it is important to consider other options when choosing an underground water storage tank.

Alternatives to Concrete Underground Water Storage Tanks

A cylindrical 20,000-gallon, below-ground HDPE tank with four green manholes on top.

Plastic tanks are often preferred over concrete for septic and water storage because they are lighter, watertight and cheaper to install. They are readily available in sizes from 250 gallons to 20,000 gallons, and they come in different configurations, such as round, rectangular and cylindrical.

Concrete tanks require heavy machinery for lifting and transport, but their plastic counterparts can be moved using simple tools like a dolly. This makes them especially beneficial in inaccessible areas where transportation costs would otherwise be high.

Plastic is more resistant to cracking, so you won’t have to inspect it as often. Made from a single piece of plastic, poly tanks don't have any joints or sealed components that could break. They're also completely resistant to water damage. So, whether you install it in damp soil or above ground in a humid climate, the plastic tank will never rust.

Although they are not prone to breaking, when plastic water tanks do crack, the fix is less complicated than you might believe. You simply apply heat and sealant to close the fracture. In some respects, plastic is more durable than concrete precisely because of its adaptability. 

Fiberglass Tank Advantages

The side of a brown, cylindrical, fiberglass water tank.

Fiberglass tanks offer many benefits and can be used for various purposes, including rainwater harvesting, water storage, fire protection, oil field storage, liquid fertilizer storage, water treatment and irrigation. They are designed to withstand corrosion, high temperatures and impact. 

Fiberglass tanks can readily store between 1,000 and 50,000 gallons, and they can be customized for different uses and easily reconfigured or repaired as needed. They are cost-effective and easily customizable to meet the specific needs of your project. Most importantly, they are durable and long-lasting to give you peace of mind knowing that your tank is highly-reliable for years to come.

Tank Depot's Underground Water Storage Options Are the Superior Alternative to Concrete

If you're looking for an underground water storage tank that is durable, long-lasting and customizable, Tank Depot has the perfect solution. We have a wide range of plastic tanks and fiberglass tanks that are inexpensive to install and perfect for various purposes, from rainwater harvesting to fire protection. 

Our one-piece, seamless below-ground plastic cisterns are made from linear polyethylene and feature the same robust, ribbed design of our septic tanks. Where applicable, these cisterns have been certified under ANSI/NSF Standard 61.

This product is FDA-approved to hold drinking water, and it is lightweight for easy carrying and installation. Additionally, this product has self-locking covers, which makes it ideal for different settings like campgrounds, resorts, vacation homes or construction sites.

When it comes to our below-ground fiberglass tanks, they include a long lifespan, high strength-to-weight ratio, ease of transport and off-loading, flexibility to customize tanks and resistance to environmental exposure. Our fiberglass tanks are also available in above-ground or below-ground options.

Plus, they are manufactured according to strict industry guidelines and can be used for various purposes, such as:

  • Water & Septic
  • Motor Oil
  • Diesel Exhaust Fluid (DEF)
  • Fire Suppression / NFPA 22
  • Rainwater Collection

With various sizes and options available, we are sure to have the right tank for your needs, at the best price. Contact us today to learn more about our underground water storage options!

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