Without good, clean, drinking water, it is difficult to survive. In the world of engineering, one of the largest challenges is figuring out how to safely store drinking water, also known as potable water. Water tanks are used for storage purposes, and each must have a potable water tank lining. There are a few characteristics that each good-quality potable water tank liner should have. Here’s a look at the key features of a good potable water tank lining system.


For a good water tank lining system, it is imperative that leaks are avoided and the liner is waterproof. The quality and integrity of the water in the tank must be maintained at all times. And to ensure this quality, it is essential that no other liquids, water, or anything else, penetrate the tank. Otherwise, all the water in the tank will be compromised.


Being able to resist ultraviolet rays, as well as extreme temperatures, is very important. This is especially pertinent for outdoor and above-ground tanks. A liner system that is weather-resistant is much less likely to degrade over time than one that is not.


It is true that tanks are built to be durable and long-lasting. For instance, soil conditions, upkeep, construction, and installation, will all have an impact on how long an underground tank lasts. In general, a tank will be good for 20 years or more. When looking for a good tank lining system, durability should also be a major factor in deciding on which one to install. Try to find the strongest one available, one that is resistant to punctures, rips, and general decay.

NSF-61 Certification

Probably the most important feature of each potable water tank lining is having the certification as NSF-61 approved. NSF stands for the National Sanitation Foundation, and category 61 refers to the limits to what can come into contact with drinking water. The restrictions are very detailed and stringent, and each potable water tank lining system should be NSF-61 certified. If it does not have this certification, the liner could potentially contain hazardous material(s) such as lead and/or plastics, for example, which could be harmful to humans.

Recap: Potable Water Tank Lining Systems

As seen here, there are many factors that go into approving every tank liner used for drinking water. There are many different types of water tank linings, such as a chemical liner, plating tank liners, heavy-duty flexible tank liners, and more. Regardless of the liner system used, the ultimate objective boils down to one thing: making sure that the drinking water in the tank is kept safe by using a reputable and NSF-61 approved potable water tank lining system.