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RainFlo 800 Gallon Above Ground Vertical Open Top Water Tank — The Fountain Direct Skip to content

RainFlo 800 Gallon Above Ground Vertical Open Top Water Tank

by RainFlo
SKU TOT-800BK
Save $162.00 Save $162.00
Original price $1,349.93
Original price $1,349.93 - Original price $1,349.93
Original price $1,349.93
Current price $1,187.93
$1,187.93 - $1,187.93
Current price $1,187.93
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Shipping (Must Read)

Due to the size of rainwater harvesting systems, shipping is quoted based on location.

Contact us with your address for a freight quote, or secure your rain harvest system now and we’ll follow up with shipping costs before processing any payment.

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Manufacturer Warranty

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Warranty

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Is this easy to use? I haven’t had a system like this before.

Yes, it’s designed to be simple and beginner-friendly. If you’re just using a tank or a basic bundle, it works passively, rainwater flows from your roof into the tank through a downspout diverter. There’s no need for electricity or complicated setup. If you need to add a tank to an already established rainwater system, it’s just as easy, most tanks can be connected in series or used as additional storage with a few basic fittings. We can help you choose the right components to make the expansion seamless.

How do I know what tank size I need for my home or garden?

 A simple way to estimate the right tank size is by calculating how much rainwater your roof can collect. Multiply your roof’s surface area (in square feet) by your average annual rainfall (in inches), then multiply by 0.62, this gives you the total gallons you could collect in a year. For example, a 1,000 sq ft roof with 30 inches of rainfall can collect around 18,600 gallons annually. From there, we can help you choose the right tank size based on your water use and how much storage you want on hand, whether you're using it for irrigation, home use like toilets or laundry, or even potable water with proper filtration.

Can I bury this tank underground?

Yes and no, not all tanks are designed to be buried. Only tanks that are specifically rated for underground installation should be placed below ground.
Always check the product specifications or reach out to us before burying any tank to ensure it’s safe and properly supported.

Is this tank safe for long-term water storage?

Absolutely. Our tanks are made from high-quality, UV-stabilized, food-grade polyethylene or reinforced materials designed for long-term rainwater storage. They resist algae growth and won’t leach chemicals into your water.

Can I collect rainwater from just one downspout?

Yes. Many basic systems start with a single downspout diverter, especially for smaller tanks. This setup is easy to install and still collects a significant amount of water, especially in areas with frequent rainfall or large roof sections.

What’s the difference between above-ground and underground tanks?

Above-ground tanks are easier to install, inspect, and move. Underground tanks save space and are often used when visual impact or limited yard space is a concern. We offer both, and we’re happy to help you decide what fits your space and needs best.

Will the tank overflow if it fills up?

No worries, each tank includes an overflow port that directs excess water safely away from the tank when it’s full. You can connect this to a drain, second tank, or garden area to make use of the overflow.

Can I connect this tank to a pump later on?

Yes. All of our tanks are compatible with add-on pumps, filters, and automation systems. You can start simple and upgrade later with no problem, just let us know your goals and we’ll help future-proof your setup.

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Get Your Personalized Quote Now

We know choosing from our huge catalog can feel overwhelming. Let us make it easier.
Request a quote, and we’ll get back to you within one business day with personalized options. No cost and no pressure to buy.

Have questions? Call us for immediate help (314) 200-1341, or start a live chat now!

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