Regular storage tank inspection is essential for keeping potable water tanks clean, safe, and efficient. These inspections help reduce risks for staff, equipment, and operations while ensuring long-term performance.
Many industries depend on tank inspections for drinking water, cleaning, food preparation, and production processes. These services are especially important for facilities that rely on water for critical daily operations.
Water storage tanks temporarily hold filtered water until it is needed. Their design, size, and capacity vary depending on the application. These tanks play a key role in industrial, commercial, and municipal systems. That’s why proper selection, installation, and maintenance—supported by thorough inspections—are crucial.
Why is Water Storage Tank Maintenance Crucial?
A water storage tank is a valuable asset. Like other essential equipment, it requires regular care to function properly. Routine storage tank inspection and maintenance offer several important benefits:
Extended service life: Regular checks help identify damage early. This protects structural integrity and prolongs tank use.
Boosts performance: Fixing small issues right away keeps the system running efficiently.
Improves water quality: Quick repairs reduce contamination risks and keep the water safe.
Lowers costs: Spotting problems like corrosion or coating failure early helps avoid expensive repairs or replacements.
Water Storage Tank Inspection Methods
Every tank maintenance plan begins with a detailed inspection. These inspections fall into two types: dry and wet.
Dry Inspection require draining the tank completely. A certified specialist then enters the empty tank to examine its structure and internal components in detail.
Wet Inspection don’t involve draining. Instead, a disinfected diver or remotely operated vehicle (ROV) enters the tank to check its condition. If the inspection reveals serious issues—like peeling paint or thinning steel—the tank must be taken out of service for repairs.
Regardless of the method, inspectors usually begin at the bottom of the tank and move upward. They check components like legs, rods, struts, and ladders. Key inspection points include steel thickness, paint condition, and coating adhesion.
Maintenance Requirements for Water Storage Tanks
TTo protect the tank’s structure and water quality, the American Water Works Association (AWWA) recommends regular storage tank inspections. The suggested frequency depends on tank location, operating conditions, and the equipment used.
Inspection frequency depends on several factors, including tank location, working conditions, and equipment type. Still, AWWA and other industry authorities suggest the following:
Tanks should be inspected every one, three, or five years—based on their application. Each inspection should cover all system components, including the paint. Since paint protects steel parts from corrosion, any damage to the coating can weaken the steel and affect water quality.
When Cleaning and Safety Measures are Necessary
Certain warning signs indicate the need for cleaning. These include:
- Recent repairs or upgrades to the water tank.
- Visible sediment buildup or biological growth, such as coliform bacteria.
- Noticeable changes in water quality.
The Occupational Safety and Health Administration (OSHA) classifies water storage tanks as “confined spaces.” This means only trained professionals may enter them for inspections or maintenance. They must wear proper protective gear and use certified extraction equipment to ensure safety.
To improve compliance and reduce risk, some facilities now use advanced tools like drones. Learn more about this approach in our guide on drone-assisted tank inspections and NFPA/AWWA compliance.
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