Steel Holding Tanks

Premium Metal Waste Holding Tanks for Strength & Durability
Looking for a reliable and robust solution for underground wastewater storage? Our selection of premium underground steel tanks is designed for a wide range of applications. From residential onsite wastewater projects to commercial and industrial needs. Unlike heavy, cumbersome concrete alternatives, our underground metal holding tanks from Montgomery Tank & Fab are manufactured with lightweight, durable steel, making transportation and installation a breeze. Don’t want the extra cost of burying a tank? The Montgomery steel containers also double as aboveground waste holding tanks with the easiest setup....


The Montgomery underground steel tanks are engineered with superior strength and a protective bituminous tar coating. As such, these welded steel tanks offer exceptional resistance to corrosion, ensuring a 25+ year life expectancy. Whether you're a contractor searching for a long-lasting, cost-effective waste holding solution or a homeowner in need of a dependable storage tank. Our certified carbon steel tank options for wastewater storage provide the peace of mind you're looking for.

We understand the importance of a reliable, high-quality product when it comes to managing waste. That’s why we've partnered with industry leaders to bring you metallic tanks that will not collapse under pressure, and are built to outlast.br>
Note: Montgomery Tanks offer robust durability with 12-14 gauge welded steel construction and a UL-approved bituminous tar coating applied inside and out. This design ensures complete waterproofing and corrosion protection, delivering a life expectancy exceeding 25 years and a 10-year warranty. While optimized for underground use, these tanks perform equally well above ground. Please note: To preserve the warranty and preventing rusting in above-ground setups, annual coating maintenance is required.

Applications of Steel Underground Holding Tanks

Our welded steel tanks are engineered to be a versatile solution for a wide range of needs. Here are some of the most common uses:

Wastewater Holding
Wastewater Holding

When a septic system isn't feasible, our aboveground & underground metal holding tanks provide a reliable and secure solution for temporarily storing wastewater. They are built to be 100% watertight, preventing any leakage that could harm the environment. This makes them a great option for remote business facilities, construction sites, RV parks, event venues, or a small hunting cabin.

Rainwater Harvesting
Rainwater Harvesting

Ideal for sustainable water management, these tanks can be installed underground or aboveground to collect and store rainwater. This harvested water can then be used for landscaping, irrigation, or other non-potable applications, helping to conserve resources.

Above-Ground Use
Above-Ground Use

While primarily designed for underground installation, these versatile tanks can also be used above ground. With a life expectancy of at least 15 years, proper maintenance—such as periodic touch-ups on corroded areas—can ensure they last just as long as they would below ground. This makes them a great, multi-purpose option for a variety of projects.

Fire Suppression
Fire Suppression

In areas where water access for fire suppression is limited, our steel tanks can serve as an essential underground reservoir. Their durable construction ensures they can safely store large volumes of water up to 1000 gallons.

Industrial Process Water
Industrial Process Water

For businesses that require a dedicated supply of water for manufacturing or other industrial processes, Montgomery steel tanks offer a robust and secure storage option.

Grease Traps
Grease Traps

These steel tanks are also a great solution for restaurants and commercial kitchens, serving as an effective grease trap to separate waste before it enters a larger sewer system.

Pump Tanks
Pump Tanks

Our underground steel holding tanks can be used as a dedicated chamber to house a pump. This pump then sends effluent to a drainfield, making them a crucial part of an on-site wastewater system.

How Montgomery Steel Holding Tanks Stand Out

While you have many options for underground storage, Montgomery Tank & Fab's products are in a league of their own. As a leading manufacturer of carbon steel tank products, their design philosophy centers on making installation easier and more cost-effective for you. Here is why our welded steel tanks are the smart choice:

Saves Time and Money on Installation
Saves Time and Money on Installation

Forget the hassle and high costs of heavy machinery and large crews. These waste holding tanks are so lightweight and easy to handle that they require minimal equipment and fewer workers, getting the job done faster and keeping more money in your pocket.

Superior, Long-Term Protection
Superior, Long-Term Protection

Each below and aboveground holding tank is coated inside and out with a UL-approved, patented protective tar coating. This isn't just a simple layer of paint; it’s a barrier that provides superior resistance to rust and corrosion, ensuring your holding tank has a life expectancy of 25+ years.

Guaranteed Watertight for Peace of Mind
Guaranteed Watertight for Peace of Mind

We know you need a secure, reliable system. That's why every single one of our underground metal holding tanks is engineered to be 100% watertight. All pipe connections are gasketed to prevent leaks, protecting the environment and giving you complete peace of mind.

Unmatched Structural Integrity
Unmatched Structural Integrity

Our belowground steel tanks are designed by professional civil and structural engineers and are built with strong, heavy-duty steel. Every tank is built to be incredibly strong and durable, offering a reliable solution you can count on.You can rest assured that your investment will not collapse under the pressure of the earth and will stand strong for decades to come.

Affordability without Compromise
Affordability without Compromise

Not only are these steel tanks easier and cheaper to install, but the initial material cost is also considerably lower than that of traditional concrete, and at times, poly alternatives. You get a premium, long-lasting product without the premium price tag.

Ready to Go, Right Out of the Gate
Ready to Go, Right Out of the Gate

When your steel tank arrives, it's ready for immediate installation and connection. The design streamlines the entire process, getting your system up and running with less effort and time on-site.

10-Year Manufacturer Warranty
10-Year Manufacturer Warranty

Your underground tank purchase is protected by a 10-year manufacturer warranty, providing added security for your investment.

A Versatile Solution
A Versatile Solution

Its design allows it to be used as a multiuse tank for various applications. They include wastewater holding, rainwater harvesting, fire suppression, and industrial process water.

Find the Right Metal Waste Holding Tank at Tank Depot

Choosing the right holding tank is a critical decision, and our team of experts is here to help. We offer a wide range of underground steel tanks for sale in various sizes to fit your specific project needs. From the moment you begin your search for a budget-friendly above or underground steel storage tank to the final installation, we are committed to providing you with a seamless experience and a quality product. Our comprehensive selection and expert support ensure you'll find a solution that not only meets but also exceeds your expectations for durability, performance, and cost-effectiveness. See why our steel tanks are built to last watch the video.

Can't find what you're looking for or need a quote? Contact us today to speak with a liquid handling expert who can guide you through our product line and provide a free custom quote.

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Capacity Name Diameter Length Width Height SKU Price
Buy 300 Gallon Steel Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $590.00 300 Gallons Buy 300 Gallon Steel Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $590.00 Montgomery Tank & Fab 300 Gallon Steel Underground and Aboveground Septic Pump / Holding Tank 45.5 45.5 45.5 49 MT-300HT $590.00
Buy 500 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $760.00 500 Gallons Buy 500 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $760.00 Montgomery Tank & Fab 500 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank 54.5 54.5 54.5 61 MT-500ST $760.00
Buy 750 Gallon Steel Coated Underground and Above ground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $1,070.00 750 Gallons Buy 750 Gallon Steel Coated Underground and Above ground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $1,070.00 Montgomery Tank & Fab 750 Gallon Steel Coated Underground and Above ground Septic Pump / Holding Tank 66.5 66.5 66.5 61 MT-750ST $1,070.00
Buy 1000 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $1,200.00 1000 Gallons Buy 1000 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $1,200.00 Montgomery Tank & Fab 1000 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank 72 72 72 66 MT-1000ST $1,200.00
Buy 1250 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $1,630.00 1250 Gallons Buy 1250 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $1,630.00 Montgomery Tank & Fab 1250 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank 72 72 72 76 MT-1250ST $1,630.00
Buy 1500 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $2,220.00 1500 Gallons Buy 1500 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank by Montgomery Tank & Fab for only $2,220.00 Montgomery Tank & Fab 1500 Gallon Steel Coated Underground and Aboveground Septic Pump / Holding Tank 86 86 86 72 MT-1500ST $2,220.00
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