Essential Guide to Water Storage Tanks
Water storage tanks play a critical role in industrial, commercial, and municipal water management systems. And the needs worldwide for such tanks are exponential. As of 2020, the global capacity for water storage in reservoirs and tanks was estimated at approximately 7,000 cubic kilometers—underscoring the critical role of storage infrastructure in water resource management. Emergency supply. Fire suppression. Process water systems. No matter the need, these tanks are designed and built to store water for all types of applications, making them integral components of infrastructure. Often field-erected, rather than in a manufacturing facility, they help ensure a reliable water supply during peak demand periods, system repairs, or emergencies, making them indispensable in critical operations. The wide range of tank materials, designs, and capacities available today reflects their importance in meeting diverse requirements.
Selecting the right water storage tank can greatly impact efficiency, durability, and maintenance requirements. Factors such as environmental conditions, water treatment needs, and expected service life must be carefully considered during the decision-making process.
In this article, we will explore different aspects of water storage tanks—their designs, maintenance needs, and the challenges associated with their use. Whether you’re considering field-erected tanks for large-scale industrial operations or smaller units for localized use, understanding the technical and operational nuances of water storage tanks is essential for long-term success.
What Is the Best Tank to Store Water In?
The determination of the best water storage tank will depend on the specific requirements of the application, including storage capacity, material, and environmental conditions. Choosing the right tank involves assessing the water’s intended use—whether for potable supply, irrigation, industrial processes, or emergency backup—and aligning these needs with the design and construction of the tank.
Common water storage tanks include:
- Steel Tanks: Known for strength and durability, steel tanks are ideal for large-scale industrial and municipal water storage. They can withstand extreme weather conditions and are often coated to prevent corrosion, making them suitable for long-term use.
- Plastic Tanks: Lightweight and resistant to corrosion, plastic tanks are a cost-effective solution for smaller storage requirements or short-term applications. Their versatility and portability often make them popular for rural or temporary setups.
- Concrete Tanks: Often used for underground storage, concrete tanks are highly durable and can last for decades when properly maintained. They are preferred for applications requiring high structural integrity and resistance to environmental exposure.
- Fiberglass Tanks: Corrosion-resistant, these tanks are suitable for environments where chemical resistance is a concern. Their lightweight construction makes them easier to install than those made of steel or concrete.
When selecting a tank, to ensure efficient, reliable performance over time, other additional factors to consider include water quality, maintenance requirements, and compatibility with local regulations.
How Long Will Water Last in a Water Storage Tank?
The longevity of water stored in a tank depends on factors such as tank composite material, water treatment, and storage conditions. Properly designed water storage tanks with airtight seals, proper ventilation, and protection from external contaminants can additionally maintain water quality for extended periods, ensuring a reliable supply for various applications. Key considerations include:
- Treated vs. Untreated Water: Untreated water may develop microbial growth, sediment accumulation, or unpleasant odors over time, making it unsuitable for drinking or industrial use. Treated water, however, can remain potable for months or even years, when stored in optimal conditions with routine chlorination or filtration.
- Tank Material: Tanks constructed from materials resistant to rust, corrosion, and chemical leaching—such as stainless steel, fiberglass, or food-grade plastic—help preserve water quality over longer durations, particularly in challenging environments.
- Environmental Factors: Temperature fluctuations, sunlight exposure, and high humidity can degrade water quality over time. For example, plastic tanks left in direct sunlight may experience algae growth, while uninsulated tanks in extreme climates may undergo rapid temperature-induced deterioration.
Regular water quality testing, proper sealing, and routine maintenance protocols—such as cleaning and sterilization—are essential to ensure the long-term use and safety of stored water.
Does Water in a Storage Tank Need to Be Treated?
Water in storage tanks often needs to be treated to prevent microbial growth, sediment accumulation, and contamination. For tanks storing potable water or water used in sensitive industrial processes, treatment is especially critical. Without proper treatment, water can become a breeding ground for bacteria, algae, and other harmful microorganisms, rendering it unsafe or unsuitable for use. Water storage tank maintenance is essential for ensuring water quality and system longevity. Key maintenance and treatment methods include:
- Chemical Treatments: Adding chlorine, iodine, or other sanitizing agents will inhibit the growth of bacteria, algae, and viruses. This is particularly important for potable water supplies.
- Filtration Systems: Installing pre-storage filtration systems can remove particulate matter, sediment, and organic debris, which settles in the tank and degrade water quality over time.
- UV Sterilization: Using ultraviolet light systems is a trusted chemical-free method to kill harmful microorganisms, particularly in systems where chemical use must be minimized.
In addition to keeping water safe for consumption or use, proper treatment also helps reduce internal corrosion and scaling, extending the tank’s lifespan and minimizing maintenance costs. Regular testing and cleaning further ensure the water remains fresh and suitable for its intended purpose.
What Are the Disadvantages of Plastic Water Tanks?
While plastic water storage tanks are popular due to their lower cost, ease of installation, and lightweight design, they do come with some disadvantages that in certain applications may limit their effectiveness:
- Durability: Plastic tanks are more susceptible to cracking, UV degradation, and physical damage, especially when exposed to harsh weather or impact. Over time, prolonged sun exposure can weaken the material, leading to leaks or structural failure.
- Limited Lifespan: Compared to steel or concrete tanks which can last multiple decades, plastic tanks have a shorter lifespan, often requiring replacement within 10–15 years. Without proper maintenance or in extreme environmental conditions, their durability may also deteriorate more quickly.
- Temperature Sensitivity: High temperatures can cause plastic tanks to warp, weaken, or even melt in extreme situations. While in colder climates, plastic may become brittle and prone to cracking, especially if the water inside the tank freezes.
- Capacity Constraints: Plastic tanks are generally built in smaller sizes due to their lightweight design, which makes them unsuitable for large-scale industrial or municipal applications. That limited capacity often restricts their use in operations requiring significant water storage volumes.
- Environmental Concerns: Disposal of plastic tanks at the end of their lifespan can contribute to environmental waste unless recycled appropriately.
Despite these drawbacks, plastic tanks remain a practical option for small-scale, temporary, or potable water storage needs, offering convenience and cost-efficiency for light commercial and residential applications. Proper placement, regular maintenance, and UV-resistant coatings can help mitigate some of these disadvantages.
Which Tank Is Best for Water Storage?
When considering long-term water storage, tanks made of durable, corrosion-resistant materials are typically the best choice for ensuring reliability and efficiency. The right tank depends on the specific needs of the application, including capacity, environmental conditions, and the intended use of the stored water. Options include:
- Steel Tanks: Known for their robustness, steel tanks are ideal for large-capacity and industrial applications. They can withstand extreme weather conditions and are often coated to resist corrosion, making them a durable choice for both above- (AST) and underground storage (UST).
- Fiberglass Tanks: Lightweight, non-corrosive, and chemically resistant, these tanks are suitable for storing water in environments with exposure to harsh chemicals or saline conditions.
- Concrete Tanks: With inherent strength and the ability to remain stable underground, concrete tanks are often the best choice for subterranean storage. Properly maintained, they can last for several decades, providing reliable, long-term solutions for large-scale water storage.
Other factors to consider when selecting a tank include the ease of maintenance, compatibility with local regulations, and the tank’s ability to protect water quality. While steel and concrete tanks are often favored for their longevity and structural integrity, fiberglass tanks offer unique advantages in specific environments. Carefully evaluating all important considerations will ensure a tank solution that ultimately best meets operational demands.
How Do You Maintain a Water Storage Tank?
Proper water storage tank maintenance is essential to ensuring safety, preserving water quality, and extending the lifespan of the tank. Neglecting regular upkeep can lead to contamination, structural failures, and costly repairs. Key maintenance practices include:
- Regular Cleaning: Periodically remove sediment, algae, and other contaminants that accumulate at the tank’s bottom. This is especially important for tanks exposed to untreated/outdoor water sources.
- Inspection: Conduct routine visual and structural checks to look for cracks, leaks, or signs of corrosion. For steel and concrete tanks, inspections should include internal and external surfaces in order to catch issues early.
- Water Quality Testing: Regularly analyzing water for bacteria, pH imbalances, and other indicators will ensure it meets safety and usage standards.
- Coating and Sealing: Apply protective coatings to the tank’s interior and exterior to help prevent corrosion, leaks, and degradation caused by environmental exposure.
- Monitoring Systems: Install automated systems to track water levels, monitor tank conditions, and detect leaks, all in real-time.
In addition to using high-quality materials during construction, consistent scheduled maintenance can significantly reduce long-term costs and operational downtime, ensuring optimal tank performance.
What Is the Life Expectancy of a Water Storage Tank?
The lifespan of a water storage tank depends on many factors, such as its material, construction quality, environmental conditions, and maintenance practices. For long-term water storage, understanding these variables is key to selecting the right tank and ensuring it performs effectively throughout its life. To follow are expected lifespans for different tank types:
- Steel Tanks: With proper maintenance, steel tanks can last 20–50 years. Tank lifespans can be significantly extended with protective coatings and regular inspections to help prevent rust and corrosion.
- Concrete Tanks: Known for their durability, concrete tanks can last 50 years or more, but they must be built with high-quality materials and maintained regularly to prevent cracking or water infiltration.
- Plastic Tanks: Typically lasting 10–15 years, plastic tanks are more vulnerable to UV degradation and temperature fluctuations, which can weaken the material over time. Adding UV-resistant coatings to the tank can help mitigate this issue.
- Fiberglass Tanks: These tanks offer a lifespan of 30–40 years, and perform especially well in environments requiring chemical resistance or where tanks may be exposed to aggressive substances.
Proactive maintenance, such as cleaning, applying protective treatments, and addressing minor repairs promptly, is crucial for maximizing the lifespan of any water storage tank. Selecting the right tank material for specific environmental conditions goes further toward ensuring reliability and long-term performance.
Conclusion
Water storage tanks are crucial for industrial, municipal, and emergency water management systems, to ensure a reliable and safe supply of water for necessary operations. Whether you need large water storage containers for large-scale facilities or specialized tanks for long-term or potable water storage, selecting the right type is essential for longevity and durability. Each design—from rugged steel tanks to durable concrete to versatile fiberglass or cost-effective plastic options—offers unique advantages and challenges, depending on the application and environmental factors.
Investing in the right tank supports operational success in addition to reducing long-term maintenance costs and improving sustainability. Our team of experts is ready to help you select and implement the perfect water storage solution tailored to your needs.
For more information about storage solutions, technical guidance, or to explore the benefits of field-erected tanks and additional features, contact Kennedy Tank today.