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Doorway Storage Tanks

Doorway Storage Tanks

Tanks for the Tightest Spots
You've measured the space in your basement, the garage, or that narrow strip along the side of your house. You know you have room for hundreds of gallons of water—if only you could get a tank in there....

That single obstacle is why we offer doorway water tanks. They are the simple, practical solution for bulk water storage in places a traditional round tank could never reach. Specifically designed with a slim profile, these narrow water tanks slide through standard doorways, down stairwells, and into tight corners with ease. Forget about settling for a collection of small, inefficient containers. These are true home water storage tanks that fit through doors, giving you the capacity of a full-size tank with the convenience of a space-saving design. Whether you call them slimline water tanks or just a smart idea, they're the answer to finally getting the water storage you need, right where you need it.

Key Applications of Doorway Slimline Tanks

Our doorway tanks are trusted by homeowners, preppers, contractors, and small businesses alike. Here's how they solve real-world storage challenges:

Residential Rainwater Harvesting

Residential Rainwater Harvesting

Homeowners in suburban areas or cities can install these tanks against a wall, under a deck, or on a patio to collect rainwater for gardening, washing cars, topping off pools, or reducing water bills without sacrificing yard space.

Emergency Water Storage

Emergency Water Storage

These tanks are perfectly sized to fit through basement doors or into garages. This makes them ideal for families looking to store a safe supply of potable water for emergencies like hurricanes, power outages, or municipal water interruptions.

Home Pressure Washing & Detailing

Home Pressure Washing & Detailing

Homeowners or mobile detailers who run a small business can use these tanks as a compact water source on a trailer or in a garage, allowing for a large water supply in a minimal footprint.

Urban Gardening & Rooftop Farming

Urban Gardening & Rooftop Farming

In densely populated urban areas, these tanks can be placed on balconies, rooftops, or in tight alleyways to provide a consistent water source for container gardens and small-scale farming.

Small Business Water Supply

Small Business Water Supply

Businesses like car washes, landscaping companies, or property management services can install slim tanks in utility closets, sheds, or narrow outdoor spaces to store water for daily operations.

Well Water & Sump Backup

Well Water & Sump Backup

For homes on well systems, a doorway tank can serve as an accessible indoor backup reservoir for cooking, flushing, or cleaning—ensuring water is available during well pump maintenance or power failures.

Why Choose a Doorway Tank from Tank Depot?

A smart design is only half the story. Here’s what makes our doorway tanks the right choice for your home or business:

Know It Will Fit Before You Buy

Know It Will Fit Before You Buy

We take all the guesswork out of the equation. Every one of our tanks has detailed doorway water tank dimensions listed right on the page. Just measure your doorway, hallway, or side yard, and you can order with complete confidence that it will slide right into place.

Big Capacity, Small Footprint

Big Capacity, Small Footprint

The slim design doesn't mean you sacrifice volume. We offer everything from smaller models to the popular 250 gallon doorway tank for basic needs, a decent 500 gallon doorway tank for serious backup, and even massive 1000 gallon doorway water tank models for total peace of mind.

Built to Last for Decades

Built to Last for Decades

These aren't flimsy containers. Our plastic doorway tanks are rotationally molded from rugged, BPA-free polyethylene that won't rust, corrode, or break down over time. We stand by our quality and carry only the best, including the industry-leading Norwesco doorway tank.

Certified Safe for Potable Water

Certified Safe for Potable Water

When you're storing water for an emergency, safety is non-negotiable. Our narrow water tanks are made from virgin resin that meets FDA standards for potable (drinking) water. You can store your backup water supply with the absolute certainty that it will be safe and clean.

When Space Is Tight, Water Storage Still Matters

Water is non-negotiable. But space? That’s where you can’t compromise. Lack of space is no longer a barrier to securing your water supply. With our lineup of doorway storage tanks, you can finally have the bulk water storage you’ve wanted, tucked away neatly and ready for anything. Browse our full selection of doorway tanks below.Check your space, choose your size, and secure the water supply your situation demands.

	Capacity	Name	Diameter	Length	Width	Height	SKU	Price
	50 Gallons	Norwesco 50 Rectangular-B with 1 inch Fitting		41	26	15	N-45880	$315.40
	100 Gallons	Norwesco 100 Gallon Doorway Water Storage Tank with Slimline Design in Black		38	22	45	N-44986	$390.00
	100 Gallons	Norwesco 100 Gallon Doorway Liquid Storage Tank with Slimline Design in White		38	22	45	N-44800	$369.99
	150 Gallons	Norwesco 150 Gallon Doorway Liquid Storage Tank in White		50	18	53	N-45716	$619.99
	250 Gallons	Norwesco 250 Gallon Doorway Liquid Storage Tank in White		62	29	44	N-42337	$769.99
	250 Gallons	Norwesco 250 Gallon Doorway Liquid Storage Tank in White		59	25	54	N-45722	$789.99
	250 Gallons	Norwesco 250 Gallon Doorway Liquid Storage Tank in Black	62	62	29	44	N-45346	$845.00
	300 Gallons	Norwesco 300 Gallon Doorway Water Storage Tank		59	25	65	N-44960-C	As low as$829.99
	400 Gallons	Norwesco 400 Gallon Doorway Liquid Storage Tank in White		66	29	70	N-43856	$1,185.77$1,221.49
	400 Gallons	Norwesco 400 Gallon Doorway Water Storage Tank in Black		66	29	70	N-44549	$1,824.62
	750 Gallons	Norwesco 750 Gallon Freestanding Tank in Black With Fitting		82	35	85	N-44985	$1,855.00
	750 Gallons	Norwesco 750 Gallon Plastic Doorway Liquid Storage Tank in White		82	35	85	N-44310	$1,919.99
Best Seller	1000 Gallons Best Seller	Norwesco 1000 Gallon Doorway Liquid Storage Tank		92	40	89	N-44045-C	As low as$2,469.99