Thank you for visiting Capitol Water Tanks! We offer a wide range of water storage tanks to fit almost any project need.  Learn more about the different types of water storage tanks we provide below.

Polyethylene Tanks

Polyethylene is the most used plastic tank material. It has good chemical resistance, excellent impact resistance, and easily moldable. Because of their economical price, they are widely popular for small scale water storage applications.  They are easily transported and relatively low in weight given their size, making them easy to get into place.

Polyethylene water storage tanks are perfect for many water storage systems such as rainwater harvesting, well water, potable drinking water, and emergency backup storage.

These water tanks are made from FDA approved polyethylene resins and are safe for human consumption of drinking water.  They come in a variety of colors depending on the model.  The opaque colors prohibit the penetration of sunlight, reducing algae growth within the tanks.

polyethylene water storage tanks
Three 2,500 gallon polyethylene tanks used in rainwater harvesting system

Galvanized Metal Tanks

Galvanized metal tanks have been a staple of water storage for generations.  From old Texas ranches to modern urban gardens, these tanks are a perfect complement to any environment.

The galvanized metal tanks are constructed with G-90 grade, 20-gauge metal made in the USA.  These tanks are coated on the inside with a painted epoxy lining to provide a protective barrier between the water and the metal itself.  With this liner, these tanks are FDA -approved for potable water applications and is ANSI / NSF 61-certified.

These tanks have a typical lifespan of 30 years.

galvanized metal water storage tank
1,500 gallon galvanized metal tank in rainwater harvesting system

Corrugated Metal Liner Tanks

Corrugated metal liner tanks offer a heavy-duty configurable water storage solution for even the most demanding projects.  Their versatility comes from the ability to be constructed at varying heights and diameters.  In addition, they have different roof styles to meet your aesthetic needs.

These tanks are constructed with corrugated side panels and a flexible liner to contain the water.  For potable applications, the liner is ANSI / NSF 61-certified.

These tanks can be designed and engineered for several applications including rainwater harvesting, well water, stormwater management, fire protection, irrigation, agricultural, industrial, and potable drinking water.

These tanks are custom built, unique to the customer’s needs and assembled at the project site.  They typically have a 20-year warranty on the shell and liner.

corrugated metal liner tanks
20,000 gallon Pioneer Water Tank in rainwater collection system

Fiberglass Tanks

Fiberglass water storage tanks are cost effective, customizable to fit your project, durable and economical for uses ranging from rainwater harvesting, well water storage, fire protection, and potable water storage.  Fiberglass tanks can even be used for oil field applications and agricultural applications such as liquid fertilizer storage.  Fiberglass tanks can range from storage capacities of 1,000 gallons to 1,000,000 gallons.

Fiberglass water tanks to provide a long and trouble-free service life.  These tanks have superior corrosion resistance to minerals and chemicals in water and soil.  They don’t need additional corrosion protection, such as exterior painting and cathodic protection systems.

Fiberglass tanks can be FDA and USDA approved as well as meeting the strict requirements of ASTM D3299 and ANS/AWWA D120 specifications.

fiberglass water storage tanks
Two 10,000 gallon fiberglass tanks used in rainwater catchment system

Modular Tanks

Underground modular structures designed to accept and hold rain and runoff water for reuse purposes, infiltration into the groundwater table, or detention for controlled release back into the watershed. These units are made from high density polyethylene which from a structural lightweight modular tank system. They have a high void space ratio (90% to 97%) in order to provide the smallest footprint per water storage ratio.

The modular nature of these systems allows for the easy construction of tanks of any volume and can be designed to accommodate specific site conditions and footprint shapes. These tanks can also be certified for AASHTO H-25 loading in traffic areas. Therefore, they can be located under parking lots in order to use the site’s space efficiently, even for compact urban sites.

modular water storage tank