Fiberglass Underground

RainFlo single wall, underground, fiberglass reinforced plastic (FRP) storage tanks set the standard for custom designed and made-to-order storage tank solutions for the rainwater, stormwater, fire suppression, potable water storage, and water reuse industries. Each tank is designed and fabricated to meet specific project needs by our team of water storage solution professionals. Our factory designed and engineered tank anchoring systems ensure RainFlo FRP tanks can be buried in any environment, including high water table applications. Tank sizes and capacities range from 4’ to 12’ diameter and individual storage volumes up to 50,000 gallons. Multiple tanks can be plumbed together to achieve system capacities over 50,000 gallons. Accepts our Pre-Assembled Integrated Filtration Vault.

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Our RainFlo FRP (Fiber Reinforced Plastic) water tanks are high quality, maintenance-free storage solutions. These environmental friendly tanks are structurally strong and watertight for years of dependability. RainFlo FRP water storage tanks utilize a hot press molding production process to ensure zero defects and constant fiberglass distribution for reliability and performance. Available in custom capacities and multiple tank shapes, there is a configuration for any application. The modular design of our water tank enables it to be compact for easy transportation or relocation. The tanks are assembled at the project site by trained installation professionals.

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The GRAF Platin low profile underground tank lineup consists of four low-profile tanks ranging from 400 gallons to 2,000 gallons. The ultra-high strength design of the Platin makes it groundwater stable up to the tank’s shoulder and, when fitted with the appropriate lid, is safe for vehicle traffic. The Platin tank is guaranteed not to collapse when empty when installed per the manufacturer’s specifications.

RainHarvest Systems offers GRAF Platin XXL modular rainwater storage systems. This modular system provides several options from the tank capacity to the tank cover, filter package, and pump package. The Platin XXL rainwater storage tank is available in a range of sizes up to a 6600 gallon capacity. To achieve 19,800 gallon capacity or greater, multiple tanks can be plumbed together. The low profile tank design allows for less excavation. Easily install the Platin XXL for your rainwater harvesting application.