The Norwesco 250 Gallon Doorway Liquid Storage Tank in black is built to clear a standard doorway and then hold a serious volume of liquid once it is inside. The dimension this product is sold on is its 29-inch width: at 29 inches wide it passes a 30-inch rough opening with roughly an inch of clearance, while standing 44 inches tall and 62 inches long. That slim profile fits where a round vertical storage tank simply cannot go - basements, utility rooms, equipment sheds, and back-of-shop spaces reached through a single conventional door. The black polyethylene wall blocks light to slow algae growth, which makes it a practical choice for non-potable water storage and general liquid storage where you need capacity in a narrow footprint.
Will it hold what you need?
This is a 250 gallon storage tank with a 1.5 specific gravity rating - meaningful headroom you are paying for. A 1.5 SG rating means the polyethylene is built for liquids up to 1.5 times the weight of water, so it handles many solutions heavier than plain water where a standard 1.0 to 1.1 SG tank would be under-rated. Filled with water, the tank carries about 2,085 pounds of contents; at its full 1.5 SG rating it is rated for up to 3,128 pounds of contents. Use those numbers when you plan the floor or pad underneath it - a fully loaded tank concentrates real weight on a 29 by 62 inch footprint, so the surface below has to carry it without flexing. If you are sizing for a specific draw-down or refill cycle, run the figures through our Tank Sizing Calculator and the Tank Sizing Guide before you commit to a position.
Where it earns its keep
The doorway profile is the whole point. Where a 250 gallon round tank is too wide to roll through a 30-inch door, this slim, tall body slides through and stands upright against a wall. That makes it a common pick for rural and remote water storage, indoor reserve supply, and fire-water reserve in buildings where the tank has to be carried in past finished framing. Before you order, measure your narrowest opening - door, hallway, stair landing - against the 29-inch width and 44-inch height, because the access path, not the room, is what limits this tank. If you are building a private fire-protection reserve, our guide to fire-water reservoir tank design for rural and remote sites walks through NFPA 22 sizing discipline and freeze protection. For mounting this doorway tank alongside its larger and smaller siblings, the Norwesco doorway tank sizing guide, 100 to 1000 gallon by application covers how the 250 fits into the full line. Where you are reusing grey water, rainwater, or condensate, the industrial water reuse tank topology guide explains how to band storage by water quality.
The mistake to avoid: support the base correctly
The most common error with a tall doorway tank is setting it on an uneven or undersized base. Place this tank on a flat, fully supported, level surface - the entire footprint should bear on a continuous surface, not bridge across joists or a cracked slab. Because the loaded weight reaches 3,128 pounds at the full 1.5 SG rating, an indoor floor or a poured pad has to be designed for that point load. Our walkthrough on concrete pad sizing for above-ground polyethylene tanks lays out the ACI 360R-10 framework so the pad does not become the failure point. For the molded-in fitting, outlet, and lid details, see the technical drawing on this page; connection sizes are confirmed per order against that drawing before shipment, so call 866-418-1777 if you need to verify a specific outlet or bulkhead size before you buy.
This doorway storage tank ships LTL freight from the nearest of six Norwesco plants - Griffin, GA; Owego, NY; Shawnee, OK; Sheldon, IA; St. Bonifacius, MN; or Washington Court House, OH - so the rate is quoted live from the closest origin to your ZIP. Get your number from the Freight Cost Estimator, or call our team at 866-418-1777 to confirm the closest shipping point and lock in your delivery.
