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Underground Plastic Water Tanks - California - New York - Utah

Find Durable Polyethylene Underground Water Tanks
When a permanent and discreet water storage solution is needed, a polyethylene underground water tank is the ideal choice. Tank Depot specializes in these durable tanks, engineered to provide a secure, buried solution without the rust and corrosion issues of traditional materials. ...

Our selection of underground water tanks is specifically designed for a straightforward and low-effort installation. We make it simple to find a reliable solution that stays out of sight while providing a dependable source of water.

Applications of Tank Depot's Underground Water Tanks

Our underground plastic water tank solutions range from 225 gallons to 20,000 gallons, providing a versatile option for nearly any project. These applications include:

Residential Water Storage
Residential Water Storage

An underground water tank is an excellent choice for homes where space is limited. They provide a safe, concealed solution for storing drinking water, or for use as a backup water supply for your household. This allows you to secure a consistent water source without a large tank taking up space in your yard.

Rainwater Harvesting Systems
Rainwater Harvesting Systems

These poly cistern tanks are the foundation of a modern rainwater harvesting system. They collect water from downspouts, keeping it safe from light and contamination, which helps reduce algae growth. The discreet design keeps your landscape uncluttered while providing a sustainable water source for irrigation, garden use, and more.

Fire Suppression & Emergency Water
Fire Suppression & Emergency Water

For homes and businesses in rural areas, an underground water storage tank can be a critical component of a fire protection system. These large-capacity tanks ensure a ready supply of water for fire suppression and serve as a reliable emergency reserve during natural disasters or power outages.

Well & Municipal Water Reserves
Well & Municipal Water Reserves

Our belowground plastic water tanks are ideal for well water systems, providing a secure place to hold a large reserve. They can also be used as a supplementary water source for municipal systems, ensuring a consistent supply in times of high demand or for non-potable uses like landscaping or street cleaning.

Wastewater & Septic Systems
Wastewater & Septic Systems

Certain models are specifically designed to serve as underground septic tanks and wastewater holding tanks. They provide a durable, cost-effective, and pre-plumbed alternative to traditional concrete tanks. Note: Not all underground cisterns come pre-plumbed.

Industrial & Agricultural Applications
Industrial & Agricultural Applications

From farms to industrial sites, our underground tanks are built for heavy-duty use. They are perfect for storing large volumes of non-potable liquids, providing a secure and durable solution for irrigation, bulk liquid delivery, and other essential industrial processes.

Why Choose Tank Depot for Underground Water Storage

Engineered for Durability
Engineered for Durability

Our tanks are rotationally molded from durable, high-density polyethylene in a seamless, one-piece construction. This ensures they will not rust, leak, or corrode, providing long-lasting, reliable performance.

Simple, Low-Effort Installation
Simple, Low-Effort Installation

Some of our underground water tanks, like those from Norwesco, require no special backfill or water filling during installation (not all models). This simplifies the process and reduces time and effort on the job site.

Safety & Compliance
Safety & Compliance

We prioritize safety. Our buried polyethylene tanks are made from FDA-approved resins and meet stringent industry standards. Many are NSF-certified for safe storage of potable water.

Superior Structural Integrity
Superior Structural Integrity

A ribbed design and molded-in support columns provide superior structural strength. This allows our underground tanks to withstand the pressure of being buried, ensuring a secure and reliable underground solution.

Ready for Customization
Ready for Customization

While fittings are generally not installed, our tanks are designed with multiple flats for easy, on-site plumbing connections. We offer a variety of accessories, including riser extensions and plumbing kits, to ensure the buried tank meets your project's specific needs.

Multi-Use Application
Multi-Use Application

Our underground storage tanks are versatile solutions for rainwater harvesting, well water storage, fire protection, and stormwater management. Certain models also serve as septic or wastewater holding tanks, meeting both residential and commercial needs.

Trust Tank Depot For Your Underground Water Storage

Choosing a reliable underground water tank is a long-term investment in your home or business. With our selection of durable, seamless polyethylene tanks, you get a solution that is not only built to last but is also easy to install and certified for safety. We eliminate the guesswork, offering tanks with superior structural strength and proven performance.

Explore our full range of plastic underground water tanks today. Find the ideal size and style for your needs, and trust that you're choosing a secure, low-maintenance solution from an industry leader.

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33 Items

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Capacity Name Diameter Length Width Height SKU Price
Buy 250 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $649.99 250 Gallons Buy 250 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $649.99 Norwesco 250 Gallon Plastic Underground Water Storage Cistern Tank 47 47 47 56 N-43746 $649.99
Buy 325 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $949.99 325 Gallons Buy 325 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $949.99 Norwesco 325 Gallon Plastic Underground Water Storage Cistern Tank 54 54 54 54 N-41321 $949.99
Buy 550 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $1,499.99 550 Gallons Buy 550 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $1,499.99 Norwesco 550 Gallon Plastic Underground Water Storage Cistern Tank 64 64 64 67 N-40856 $1,499.99
Buy 575 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $1,499.99 575 Gallons Buy 575 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $1,499.99 Norwesco 575 Gallon Underground Water Storage Cistern Tank 97 48 42 N-44360 $1,499.99
Buy 600 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $1,399.99 600 Gallons Buy 600 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $1,399.99 Norwesco 600 Gallon Underground Water Storage Cistern Tank 101 51 47 N-41328 $1,399.99
Buy 825 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $2,099.99 825 Gallons Buy 825 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $2,099.99 Norwesco 825 Gallon Plastic Underground Water Storage Cistern Tank 92 60 51 N-43569 $2,099.99
Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,099.99 1000 Gallons Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,099.99 Norwesco 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank 102 60 63 N-41734 $2,099.99
Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank with Gaskets, Tees, and 2 Manhole Covers by Norwesco of Blue color for only $2,049.99 1000 Gallons Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank with Gaskets, Tees, and 2 Manhole Covers by Norwesco of Blue color for only $2,049.99 Norwesco 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank with Gaskets, Tees, and 2 Manhole Covers 102 60 63 N-44463 $2,049.99
Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,449.00 1000 Gallons Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,449.00 Norwesco 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank 102 60 63 N-41735 $2,449.00
Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank (for Canada) by Norwesco of Blue color for only $2,439.00 1000 Gallons Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank (for Canada) by Norwesco of Blue color for only $2,439.00 Norwesco 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank (for Canada) 102 60 63 N-41736 $2,439.00
Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank IAPMO Approved by Norwesco of Blue color for only $2,299.99 1000 Gallons Buy 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank IAPMO Approved by Norwesco of Blue color for only $2,299.99 Norwesco 1000 Gallon Plastic Multi-Use Underground Liquid Storage Tank IAPMO Approved 102 60 63 N-41820 $2,299.99
Buy 1175 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,199.99 1175 Gallons Buy 1175 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,199.99 Norwesco 1175 Gallon Underground Water Storage Cistern Tank 127 60 51 N-40199 $2,199.99
Buy 1175 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,199.99 1175 Gallons Buy 1175 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,199.99 Norwesco 1175 Gallon Underground Water Storage Cistern Tank 127 60 51 N-44405 $2,199.99
Buy 1200 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,299.99 1200 Gallons Buy 1200 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,299.99 Norwesco 1200 Gallon Underground Water Storage Cistern Tank 102 60 63 N-41329 $2,299.99
Buy 1250 Gallon Two Compartment Septic Tank with Two Manholes - Approved in Canada - IAPMO Certified by Norwesco of Blue color for only $2,951.00 1250 Gallons Buy 1250 Gallon Two Compartment Septic Tank with Two Manholes - Approved in Canada - IAPMO Certified by Norwesco of Blue color for only $2,951.00 Norwesco 1250 Gallon Two Compartment Septic Tank with Two Manholes - Approved in Canada - IAPMO Certified 116 55 70 N-41754 $2,951.00
Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank with Gaskets, Tees, and 1 Manhole Cover by Norwesco of Blue color for only $2,424.00 1250 Gallons Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank with Gaskets, Tees, and 1 Manhole Cover by Norwesco of Blue color for only $2,424.00 Norwesco 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank with Gaskets, Tees, and 1 Manhole Cover 116 55 70 N-44466 $2,424.00
Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,749.99 1250 Gallons Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,749.99 Norwesco 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank 116 55 70 N-41753 $2,749.99
Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,699.99 1250 Gallons Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,699.99 Norwesco 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank 116 55 70 N-41821 $2,699.99
Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,640.00 1250 Gallons Buy 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $2,640.00 Norwesco 1250 Gallon Plastic Multi-Use Underground Liquid Storage Tank 116 55 70 N-41752 $2,640.00
Buy 1400 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $2,699.99 1400 Gallons Buy 1400 Gallon Plastic Underground Water Storage Cistern Tank by Norwesco of White color for only $2,699.99 Norwesco 1400 Gallon Plastic Underground Water Storage Cistern Tank 116 55 70 N-41893 $2,699.99
Buy 1425 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,699.99 1425 Gallons Buy 1425 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $2,699.99 Norwesco 1425 Gallon Underground Water Storage Cistern Tank 157 60 51 N-44406 $2,699.99
Buy 1425 Gallon Underground Water Storage Cistern Tank with side inlet flats by Norwesco of White color for only $2,644.00 1425 Gallons Buy 1425 Gallon Underground Water Storage Cistern Tank with side inlet flats by Norwesco of White color for only $2,644.00 Norwesco 1425 Gallon Underground Water Storage Cistern Tank with side inlet flats 157 60 51 N-43573 $2,644.00
Buy 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $3,364.00 1500 Gallons Buy 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $3,364.00 Norwesco 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank 135 55 70 N-41772 $3,364.00
Buy 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $3,299.99 1500 Gallons Buy 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank by Norwesco of Blue color for only $3,299.99 Norwesco 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank 135 55 70 N-41822 $3,299.99
Buy 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank - IAPMO Approved by Norwesco of Blue color for only $3,099.99 1500 Gallons Buy 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank - IAPMO Approved by Norwesco of Blue color for only $3,099.99 Norwesco 1500 Gallon Plastic Multi-Use Underground Liquid Storage Tank - IAPMO Approved 135 55 70 N-41771 $3,099.99
Buy 1500 Gallon Plastic Multi-Use Underground Tanks with Gaskets, Tees, and 1 Manhole Cover by Norwesco of Blue color for only $3,000.00 1500 Gallons Buy 1500 Gallon Plastic Multi-Use Underground Tanks with Gaskets, Tees, and 1 Manhole Cover by Norwesco of Blue color for only $3,000.00 Norwesco 1500 Gallon Plastic Multi-Use Underground Tanks with Gaskets, Tees, and 1 Manhole Cover 135 55 70 N-44469 $3,000.00
Buy 1500 Gallon Two Compartment Septic Tank with Two Manholes - Approved in Canada - IAPMO Certified by Norwesco of Blue color for only $3,551.00 1500 Gallons Buy 1500 Gallon Two Compartment Septic Tank with Two Manholes - Approved in Canada - IAPMO Certified by Norwesco of Blue color for only $3,551.00 Norwesco 1500 Gallon Two Compartment Septic Tank with Two Manholes - Approved in Canada - IAPMO Certified 135 55 70 N-41774 $3,551.00
Buy 1700 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $3,399.99 1700 Gallons Buy 1700 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $3,399.99 Norwesco 1700 Gallon Underground Water Storage Cistern Tank 135 55 70 N-41330 $3,399.99
Buy 1725 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $3,299.99 1725 Gallons Buy 1725 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $3,299.99 Norwesco 1725 Gallon Underground Water Storage Cistern Tank 157 69 51 N-44407 $3,031.66$3,299.99
Buy 2500 Gallon Multi-Use Underground Liquid Storage Tank by Norwesco of White color for only $5,909.99 2500 Gallons Buy 2500 Gallon Multi-Use Underground Liquid Storage Tank by Norwesco of White color for only $5,909.99 Norwesco 2500 Gallon Multi-Use Underground Liquid Storage Tank 159 99 51 N-44079 $5,488.19$5,909.99
Buy 3525 Gallon Multi-Use Underground Liquid Storage Tank by Norwesco of White color for only $9,629.99 3525 Gallons Buy 3525 Gallon Multi-Use Underground Liquid Storage Tank by Norwesco of White color for only $9,629.99 Norwesco 3525 Gallon Multi-Use Underground Liquid Storage Tank 211 102 51 N-44390 $8,497.44$9,629.99
Buy 5025 Gallon Underground Water Storage Cistern Tank with Riser by Norwesco of White color for only $13,899.99 5025 Gallons Buy 5025 Gallon Underground Water Storage Cistern Tank with Riser by Norwesco of White color for only $13,899.99 Norwesco 5025 Gallon Underground Water Storage Cistern Tank with Riser 211 102 96 N-44877 $12,982.26$13,899.99
Buy 5025 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $12,999.99 5025 Gallons Buy 5025 Gallon Underground Water Storage Cistern Tank by Norwesco of White color for only $12,999.99 Norwesco 5025 Gallon Underground Water Storage Cistern Tank 211 102 73 N-44876 $12,814.93$12,999.99
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  1. Polyethylene 33 items
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