The #1 Tank for Small Spaces.
The #1 Tank for Small Spaces.
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Why Choose a ThinTank?
Slimline Design
Saves valuable space while adding sleek, modern appeal.
Expandable Capacity
Connect multiple tanks in series for more storage — or even form a privacy wall.
Made to Last
Constructed in the USA from UV-stabilized, BPA-free resin with a 10-Year Manufacturer’s Warranty.
Versatile Use
Perfect for rainwater harvesting, irrigation, or emergency backup supply.
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ThinTanks with ThinPots for vertical gardening.
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ThinTanks being used as fence in backyard.
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ThinTanks easily fit along existing sheds or structures.
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ThinTank seamlessly fits along house wall.
ThinTanks are compact, durable, and designed for suburban living.
Not every property needs a massive storage system. Sometimes, a smaller water tank is the perfect fit. Whether you’re collecting rainwater for your garden, storing an emergency supply, or adding capacity to an existing system, Lakota Tank Company offers premium small tank options that blend quality, durability, and smart design.
We proudly offer ThinTanks, one of the best compact tanks on the market.
Only 11 Inches Wide
The 300-gallon ThinTank is built for homeowners who need reliable storage without sacrificing space. At only 11.25 inches wide, it fits neatly against walls, fences, or garages — ideal for tight lots, urban homes, or decorative installations.
300 Gal*
94.5” L × 78” H × 11.25” W
*These tanks can be combined to provide larger water storage options - ranging from 600 or 900 gallons, to even several thousand gallons of water storage.
Send us a message to learn more or ask about additional sizes.
Who We Are
At Lakota Tank Company, we specialize in providing reliable and high-quality water storage tanks for a variety of needs, including well water storage and rainwater storage.
As a family-owned business, we are proud to uphold the Christian values of honesty and integrity in all our business transactions, ensuring that every customer receives exceptional service and dependable solutions.
Lakota Tank Company was born from the success of our sister company, Lakota Water Company, established in 2002 by Alan and Amy Rossing. With over two decades of experience in water solutions, the Rossing family has built a reputation for excellence and trust in the communities we serve.
Our mission is to extend that legacy by offering an extensive selection of water storage tanks designed to meet your unique project's needs.
Based in Dripping Springs, TX
1,500+ Happy Customers
60+ Years of Experience | 1,500+ Happy Customers
Your Trusted Partners in Water Storage
FAQs
What’s the best small tank for tight spaces?
The ThinTank is ideal for narrow or limited spaces. At only 11.25 inches wide, it fits neatly along fences, walls, or garages—perfect for small lots, patios, or urban homes.
Are these tanks safe for drinking water?
Yes. Thin Tanks are food-grade and potable-water safe. ThinTanks use BPA-free, FDA-compliant resin, for safe drinking water storage.
Can multiple ThinTanks be connected together?
Absolutely. ThinTanks are designed for modular expansion — you can connect several units in series to increase capacity or create a functional privacy wall that stores water.
Do small tanks require maintenance?
Maintenance is minimal. We recommend checking inlets, outlets, and filters seasonally and rinsing the inside every 1–2 years to remove sediment. Our service team offers annual maintenance plans for convenience.