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Rainwater Storage Options

Your Industry-Leading Supplier For Rainwater Storage

Rainwater Storage Options

What Types Of Rainwater Storage Options Are There?

Rainwater storage 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 tank providers across the country to provide you with a variety of storage tank options (both above and below ground) to fit all of your residential or business needs.

We also offer a free tank sizing analysis to help you determine the absolute best and most efficient storage system based on variables like roof square footage, daily rainfall data, and daily use. Not sure about your variables? We can determine your tank size based on demand for toilet flushing, irrigation, laundry services, and more. Check out our rainwater storage options below.

Storage Options

A variety of storage tanks are available for above and below-ground installations with various materials of construction.

Metal storage tanks

  • Corrugated galvanized metal cisterns or tanks can be used for potable (drinking water) and non-potable (non-drinking water) purposes.
  • Corrugated galvanized metal tanks come in a variety of sizes, making them a great option for residential or business use.
  • These tanks are completely protected from UV degradation, ensuring you won’t have problems with chemicals leaching into your water or bacterial growth.
  • Extreme durability means they will be great for long-term use.

Fiberglass storage tanks

  • These tanks range from 300 to 60,000 gallons for below-ground installations and 20,000 gallons for above-ground installations.
  • Fiberglass is non-corrosive, long-lasting, and are great for when large amounts of water are needed to reuse for commercial irrigation, agriculture, and more.


  • typically used for below-ground installations
  • built to last
  • can come with potable or non-potable
  • requires crane for installation
  • Proper county buoyancy equipment
    included with tank
  • 8-14 Lead Time

Modular storage tanks

  • These tanks are available in many different configurations to ensure they meet the necessary size, depth, and load ratings for any project.
  • They're low-impact development for rainwater capture and reuse and can be installed below ground.

Polyethylene storage tanks

  • Commonly referred to as one of the most economical choices for rainwater harvesting.
    These tanks are versatile and can be used above or below ground.
  • They can also be used for non-potable or potable applications and come in a wide range of capacities, shapes, sizes, and diameters.


High Density Polyethylene Pipe (HDPE) storage

  • These tanks are corrosion-resistant and come available in 4-16" diameters and 13' to 20' lengths.
  • They can be configured to hold large amounts of water and can last a minimum of 100 years. HDPE pipe is also NSF certified for potable water storage.

It can be challenging to determine which type of rainwater storage tank is right for you, whether you're a homeowner, business owner, or an 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 tank is right for your project using our tank sizing software. For a free tank sizing analysis, contact Rainwater Management Solutions today.

RMS works with leading tank providers across the country to ensure the tank meets project’s requirements.

Tank Sizing

RMS utilizes tank sizing software to identify the appropriately
sized storage capacity to fulfill demand requirements, allow for
system overflow to promote high water-quality, and reduce costs
when possible.

Variables such as daily rainfall data, roof square footage, and
daily use are used for every analysis. If such variables are
unknown, RMS can help determine daily use for irrigation, toilet
flushing, and laundry services demand.

Cost Analysis can also be determined if desired by using water
cost per 1,000 gallons, sewer costs per 1,000 gallons, and
stormwater fees per month per 1,000 square feet of impervious
areas. This can help determine the cost effectiveness of incorporating a rainwater harvesting system.

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