GRP vs. Stainless Steel: Choosing the Right Water Storage Tank Material

If there are two things business establishments dread having to deal with, it is to face the water crisis and contamination. Why wouldn’t they be worried, considering that without water, a limited natural resource, human activity is impossible, and money is worthless without it?

You don’t want that to happen, do you? Thankfully, you’ll never have to suffer from water shortage if you have a water storage tank. But since there are different kinds of water storage tanks available in the market, how do you know you get the best water storage tank material for your needs?

GRP water storage tanks and stainless steel water storage tanks are the two best options for water storage tanks currently available on the market. To help you decide which material is best for your water tank, we’ve compared and contrasted plastic and metal tanks to show their advantages and disadvantages.

GRP Water Storage Tanks

In a nutshell, GRP or FRP water tanks are the abbreviations of Fiberglass Reinforced Plastic water tanks. They are lightweight, sturdy, yet workable fiberglass designs. GRP tanks provide safe storage for water without the risk of corrosion or contamination from bacteria.

They are also resistant to external temperatures and adverse weather, meaning they will not degrade over time. These materials also make the water tanks pliable, which can be adapted at the manufacturing level for any specific access or locational needs.


GRP water storage tanks are versatile because they can be for personal or business use or both and can provide many benefits for you, your family, and your business. Here are some of the benefits of having a GRP Water Storage Tank:

  • Safety

A GRP tank is ideal for storing and distributing potable clean drinking water. Schools, hospitals, and homes can benefit significantly from installing a GRP tank. It has improved resistance to bacterial growth, reduced risk of osmotic attack, and is suitable for global climatic conditions.

  • Maintenance & Costs

GRP tank is designed to last 25 years. Together with the corrosion properties, this material is maintenance-free compared to steel & aluminum, which can rust, corrode, and need to be coated or repainted over the same period as the design life of GRP.

GRP material is a low-cost option due to its lightweight capabilities; it is 70% – 80% lighter than steel, and transport cost is dramatically reduced as no heavy lifting equipment is required to on/offload.

  • Customization

GRP water tanks are fully customizable units and can be manufactured to any shape and size, depending on the consumer’s requirements. The color of the water tanks is also customizable, an essential feature for companies storing a vast array of dangerous and non-dangerous chemicals. Color customization allows immediate identification of GRP tanks and their contents.

Stainless Steel Water Storage Tanks

Stainless Steel Water Storage Tanks are proven and tested, and more people would often prefer to buy stainless steel water storage tanks compared to other materials. Stainless steel is super-durable with little impact on the environment. Not only fire, rust, and corrosion resistant, stainless steel is also 100% recyclable.


Being proven and tested, you can never go wrong when choosing stainless steel as your water storage tank material. Here, we will explain why you should get a stainless-steel water storage tank.

  • Durability and Longevity

Stainless steel water tanks offer excellent resistance to crevice corrosion, cavitation, and normal wear and tear in pure and contaminated waters. This material is also heat resistant and is not affected when exposed to harmful radiation.

Plus, with a service life of up to 100 years, you can be assured that your stainless-steel water tank will stand the test of time.

Stainless steel offers more excellent durability than concrete, plastic, or carbon steel. This strong material resists oxidation by biocides and water, a highly beneficial feature for businesses that need to store water in the tank or any other corrosive material. Moreover, the exterior or internal coating isn’t required for these tanks.

  • Recyclable

Stainless steel water storage tanks are environmentally friendly. The advancements in stainless-steel production in the past years have focused on using natural resources and energy. Most stainless-steel storage tanks now contain 60% to 70% recycled materials, making them recyclable.

Final Thoughts

Choosing between the two materials will really matter on how you will use the water tank, where you will put it, and for how long it will serve you. GRP and stainless steel are great materials for specific purposes. Still, you will have to determine these factors to choose the right material. 

Need Help Choosing The Best Water Storage Tank Material?

American Tanks is committed to exceeding customers’ expectations by offering superior, functionally durable, and operationally convenient water storage tanks at the right price and quality.

We service all industrial and commercial tank and liner needs all over the U.S., offering varieties of tank materials, such as Reinforced Plastic Tanks, Stainless Steel Tanks, Hot-Dipped Galvanized Tanks, and a lot more!

Being in the water tank industry for over two decades speaks volumes about our reputation. Let us discuss your project and learn why American Tanks has remained a trusted partner to many Australian and American-based clients since our founding branches opened.

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