What to Look for When Choosing a Potable Water Tank Lining

Water storage tanks have been used throughout history, but nowadays they rely on state of the art technology for installation and maintenance. Especially when it comes to potable water storage, water tank liners must meet exacting standards. There are several kinds of potable water tank lining, depending on the material used in the construction of the tank itself. Given the variety of tank liners available, there are some things to keep in mind when choosing the right kind of liner for each project.

Why do water tanks need a lining?
Water tanks are essential for human life, for storage of potable water as well as waste water to be treated. Storage tanks may be open or underground, but if they are being used for potable water, they will need a lining. Water tanks may be made of concrete or steel. Steel has been used for over a hundred and fifty years to store potable water that will be used for drinking and cooking purposes.
Concrete and steel are both very durable, and storage tanks built using these materials can last a long time. The typical useful life for underground tanks is 20 years or more. Factors like construction material, installation, soil conditions and maintenance can all affect their durability. Tank liners can also help extend the lifespan of underground storage tanks. When storing potable water, tank liners are always needed. That’s because steel can become corroded and concrete can develop cracks and leaks over time that will lead to contamination of the stored water.

What to look for in potable water tank linings
There are many kinds of water tank liners, and choosing the right one depends on the materials of which the tank is made, as well as its location and condition. Cost is another factor in choosing a potable water tank lining. The correct liner can extend the service life of your tanks even longer.
Potable water tank linings must meet the standards outlined in NSF/ANSI 61: Drinking Water System Components – Health Effects. These determine the criteria for materials to be used in the water system, including:

  • cements, paints, coatings that make up the protective barrier,
  • gaskets, adhesives and lubricants used for joining and sealing
  • water meters, valves, filters, pipes, hose, fittings
  • filter media

The materials selected should be durable, impermeable, and eco-friendly. Ease of installation is often another consideration when choosing a potable water tank lining.
The right potable water tank lining can help extend the life of your storage tanks, while improving their functioning over the duration. It can also help maintain the quality of the stored water, which is essential for health and well-being.

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