How To Choose the Right Rainwater Tank


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Rainwater collection tanks (aka cisterns or vessels) allow you to capture rainwater that can then be used for any purpose requiring water. Rainwater Management Solutions works with leading rainwater tank providers across the country to provide our customers with a variety of storage tank options (both above and below ground) to fit all of your residential or business needs.

Things to Consider Before Selecting a Rainwater Tank

When choosing your own rainwater collection tanks, there are a few factors that you should consider. At RMS, we offer just about every type of rainwater tank you can think of because we understand that every business will have different needs. A residential system won’t have the same capacity requirements as a large industrial manufacturer. An agribusiness may not need much filtration while a tiny home installation will require filtration and disinfection for consumption. Here are just a few things to consider when selecting your rainwater collection tank:

  • Capacity
  • Filtration
  • Location
  • Application
  • Above-ground or in-ground?
  • Climate

If you are unsure of your requirements, we also offer free tank sizing analysis to help you determine the most efficient storage system based on variables like roof square footage, daily rainfall data and daily use. We can determine your rainwater tank size based on demand for toilet flushing, irrigation, laundry services and more.

What Types of Rainwater Collection Tanks Are There?

Once you have nailed down some specifics about the size and location of your rainwater collection tank, the next step is to choose what materials you would like it to be made out of. There are a number of choices, all of which come with their own unique properties.

Metal Storage Tanks

Made of corrugated galvanized metal, these storage tanks (also referred to as cisterns) utilize a PVC liner and can be used for potable (drinking water) and non-potable (non-drinking water) purposes.

Metal storage tanks come in a variety of sizes, making them a great option for residential or business use. Extremely durable and ideal for all-weather use, our metal storage tanks are completely protected from UV degradation, ensuring you won’t have problems with bacterial growth.

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Fiberglass Storage Tanks

Ranging from 300 to 50,000 gallons for below-ground installations and 20,000 gallons for above-ground installations, our fiberglass storage tanks are non-corrosive and long-lasting. When large amounts of water are needed to reuse for commercial irrigation or agriculture, fiberglass storage tanks are a reliable solution.

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Modular Rainwater Tanks

Available in many different configurations, our modular rainwater tanks can be adjusted to ensure they meet the necessary size, depth and load ratings for any project. Providing low-impact development for capture and reuse, modular rainwater tanks are installed below ground.

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Polyethylene Storage Tanks

One of the most economical choices for rainwater harvesting, polyethylene storage tanks are versatile and can be used above or below ground. Polyethylene storage tanks are available for potable and non-potable applications and come in a wide range of capacities, shapes, sizes and diameters.

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High Density Polyethylene Pipe Cisterns (HDPE) Storage

Corrosion-resistant and available in 36”-60” diameters and lengths from 10’ to 20’, HDPE storage can be configured to hold large amounts of water and are assured of a long service life. These cisterns are customizable, with a variety of fitting options for site-specific design and application.

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Get Fitted for Your Rainwater Harvesting Tank Today

It can be challenging to determine which type of rainwater collection tank is right for you. Whether you’re a homeowner, business owner or engineer, there are many commercial rainwater storage applications and residential rainwater storage applications that have different needs. Rainwater Management Solutions can help you determine which rainwater tank is right for your project using our tank sizing software. For free rainwater tank size analysis, contact us today.

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