Applications · Reservoirs & Water Storage
Hollow Plastic Ball Covers for Reservoirs & Water Storage
The challenge
- Evaporative water loss in a multi-acre open reservoir
- Algae and cyanobacteria affecting water quality
- Sunlight-driven formation of disinfection byproducts
- Need for potable-water-appropriate materials
How Armor Ball® helps
Floated across a reservoir, Armor Ball® covers 91% of the open surface — the area that drives evaporation — conserving up to 90% of evaporative loss while shading the water to limit algae and the UV-driven reactions, such as bromate formation, that can affect treated water.
The balls are molded from UV-stabilized HDPE specified for potable-water/food-contact use when required, with NSF/ANSI 61 documentation where applicable available on request. They let rain and snow pass through, self-adjust to changing levels, and carry a 25+ year design life with a 10-year warranty.
What to look for when covering a reservoirs & water storage surface
- Potable documentation: For drinking-water reservoirs, request material certifications, SDS, and NSF/ANSI 61 documentation where applicable before specifying.
- Wind exposure: Open reservoirs can be windy; standard Armor Ball® is rated to 35 MPH, while Armor Ball® AQUA's pre-filled ballast holds to 75 MPH on exposed sites.
- Savings estimate: Evaporation savings scale with climate and surface area — run your numbers through the evaporation calculator first.
Outcomes
FAQ
Reservoirs & Water Storage — questions answered
How much water can a ball cover save on a reservoir?
By covering 91% of the surface, Armor Ball® reduces evaporative water loss up to 90% per AWTT published data; actual savings depend on local climate, wind, and the reservoir's surface area.
Is the material safe for potable-water reservoirs?
Armor Ball® is molded from UV-stabilized HDPE specified for potable-water/food-contact use when required. Material certifications, SDS, and NSF/ANSI 61 documentation where applicable are available on request.
Will rain still reach a covered reservoir?
Yes. Because the cover is made of discrete balls with small interstitial gaps, rain and snow pass through to the water below rather than pooling on top, so the reservoir keeps collecting inflow while evaporative loss is cut.
Get a custom Armor Ball® quote
Tell us about your site — surface area, liquid, and goals — and we'll size a cover and respond within 24 hours.
Manufactured by AWTT · 700+ installations · 25 countries · 10-year warranty