Rainwater Harvesting Tanks

Xerxes Rainwater tank

Harvesting Rainwater Addresses Water Shortages

Homes, businesses and communities can all benefit from the corrosion-resistant fiberglass rainwater storage tanks that Xerxes provides. With concern about diminishing supplies of water, it’s never been more important to make every attempt to collect and reuse water. Harvested rainwater can easily be used for irrigation and landscaping, and when treated it can supply greywater or even potable water. For potable water use, our tanks can be shipped as NSF 61-listed tanks.

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Xerxes tanks meet – or exceed – industry standards

IAPMO/ANSI Z1002
Tanks can be manufactured to comply with the IAPMO/ANSI Z1002 standard, which covers rainwater harvesting tanks and specifies requirements for design, materials, manufacture, performance, testing, and markings.

NSF/ANSI/CAN 61 – Drinking Water System Components – Health Effects

If required, the Xerxes tank can be manufactured as NSF-listed (and labeled).

Why choose a Xerxes rainwater harvesting tank?

  • Designed to be 100% watertight
  • Single-tank capacities from 600 to 60,000 gallons
  • Designed to withstand H-20 / HS-20 axle loads
  • Underground installation optimizes land use
Rainwater Harvesting Tank Data Sheet
Rainwater Harvesting Tank Guide Spec
Resource Library

Rainwater Tanks Success Stories

Rainwater tank Washington DC

Residential complex - Washington, D.C., US

Reusing rainwater can minimize strain on municipal systems.

The developer of a Washington, D.C. waterfront apartment building with ground-level retail needed a system for water harvesting and recycling in a limited space. Because of our custom manufacturing and field modification capabilities, we were able to provide just the right size tanks for the small footprint instead of the originally specified wide-diameter piping system. Two fiberglass tanks, with a total capacity of 40,000 gallons, were the long-term solution for collecting, disinfecting and storing water for the project. The developer benefited from Xerxes’ turnkey approach, with our access openings, fiberglass ladders, flanged nozzles and anchoring system. The water is being reused as greywater, which provides ongoing cost savings and water conservation.

Greenhouse rooftop - Wisconsin, US

Collecting, treating and reusing rainwater adds up

A complete water harvesting system was designed for the 60,000-square-foot glass rooftop of the Milwaukee County Greenhouses in Wisconsin using Xerxes’ durable fiberglass tanks. Four of our tanks collect approximately 38,000 gallons of water for every one-inch rain event. The collected rainwater is then filtered, disinfected and redistributed for year-round irrigation inside the greenhouses. This translates into a potential capture and reuse of more than one million gallons of rainwater and snow melt every year. The state-of-the-art facility at this site, and the cost savings it provides, enables the county to serve the community in many ways, including conserving valuable water resources.

greenhouse