400 Gallon Doorway Water Tank

The Norwesco 400 Gallon Doorway Water Tank (SKU N-43856) is built to pass through a standard doorway: at 29 inches wide and 66 inches long with a 70-inch overall height, its slim footprint lets you stage 400 gallons of water storage in basements, utility rooms, greenhouses, and other tight spaces a round vertical tank simply can't reach. Molded in white polyethylene and carrying a 1.5 specific gravity structural rating, this Norwesco doorway tank earns its place wherever access is the limiting factor.

Will it work for your site

Filled with water, this tank carries 3,336 pounds of contents at capacity. Size your floor pad and slab around the full structural rating, though: at 1.5 SG the polyethylene shell is rated to a maximum contents weight of 5,004 pounds (400 gallons x 1.5), so plan to the 5,004 lb number, not the 3,336 lb water figure. The 29.0 x 66.0 inch footprint is the dimension to lay out first: confirm your doorway clearance, your floor's load rating, and a level pad before delivery. Run your volume and weight numbers through the Tank Sizing Calculator, and review the Tank Sizing Guide if you are deciding between this 400 gallon Norwesco doorway tank and another size. For a deeper walkthrough of this exact model, see the 400 Gallon Doorway Water Tank: Complete Buyer's Guide. Fitting locations and outlet details are shown on the technical drawing on this page.

How it ships

This is an LTL freight item, quoted live to your ZIP code. Norwesco molds this tank at plants across the country, so it ships from the location nearest you: Griffin, GA; Hanford, CA; Lancaster, OH; Owego, NY; Shawnee, OK; St. Bonifacius, MN; or Washougal, WA. Shipping from the closest plant keeps your transit distance and freight cost down. Get a freight estimate before you order with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you.

The mistake to avoid

The most common error with a doorway tank is treating the 29-inch width as the only clearance that matters. It isn't. The tank stands 70 inches tall, so before it can be walked through a standard doorway it has to be tipped and maneuvered, and a 70-inch body needs real diagonal room to clear the frame and any low headers. Measure your narrowest doorway, hallway, and turn, and account for the full height when you plan the tip-up, not just the width. The other point worth landing: the 1.5 specific gravity figure is a structural rating, not an invitation to fill with just anything. This is a water-service tank; for pure water storage you are comfortably within spec, and the SG headroom is there to protect the shell, not to repurpose the tank.

Ready to stage water where space is tight? Use the Freight Cost Estimator for a freight quote to your ZIP, the Tank Sizing Calculator to lock in your volume, or call 866-418-1777 to talk through your install. If you are planning a rural fire-water reserve or an industrial water-reuse train, our guides on fire-water reservoir design and industrial water-reuse tank topology walk through the engineering.

3 Year Warranty