The Norwesco 300 Gallon Doorway Tank (SKU 41527) is built to pass through a standard interior doorway and reach spaces a wide tank never could, holding 300 gallons in a footprint of just 29.0 x 66.0 inches. Molded in natural white polyethylene at 50 inches tall, it carries a 1.5 specific gravity rating, so the wall thickness is rated for liquids heavier than water, not only the water most buyers store in it. This is the tank to reach for when the install site is a basement, a back room, a greenhouse, or any location behind a standard opening where a vertical or horizontal tank simply will not fit.
Will this 300 gallon doorway tank work for my site?
Plan around the loaded weight, not just the gallons. Filled with water this Norwesco tank weighs about 2,502 lb, and at its full 1.5 specific gravity rating it can carry up to 3,753 lb of contents. That total bears on the floor or pad under a 29 x 66 inch footprint, so confirm the slab or framing can take the point load before filling. The 1.5 rating is the real reason to choose this tank over a water-only model: it is built for contents up to roughly 12.5 lb per gallon, versus about 8.34 lb per gallon for water, which is what lets a buyer storing brine, dense slurry, or a heavier liquid use the same compact footprint. For above-ground concrete work, our guide to concrete pad sizing under the ACI 360R-10 framework walks through the load math. If you are still deciding on capacity, the Tank Sizing Calculator and Tank Sizing Guide help match gallons to your draw, and the Norwesco doorway tank sizing guide from 100 to 1000 gallon by application compares this 300 gallon size against its siblings. At a typical household or irrigation draw, 300 gallons works as a buffer or day-tank rather than a long-term cistern, so step up to a larger doorway size if your load is bigger.
Where it fits and how to use it
Because it clears a doorway, this Norwesco tank is a common pick for rainwater capture, grey-water and condensate aggregation, indoor water storage, and rural fire-water reserves where the storage has to live inside an existing structure. If you are designing a private fire-protection reserve, the fire-water reservoir tank design guide covers NFPA 22 sizing and freeze protection, and for staged reuse trains the industrial water reuse tank topology guide shows how grey-water, rainwater, and HVAC condensate banks sequence together. See the technical drawing on this page for overall dimensions, and because fitting configuration is not specified in this listing, confirm inlet, outlet, and lid sizes and locations by phone at 866-418-1777 before you order.
The mistake to avoid
Measure the doorway and the path, not just the tank. At 29 inches wide and 66 inches long, this tank is designed to fit through a standard 30-inch doorway, but measure your actual clear opening, since hinges and door stops reduce it, and a 28-inch clear door can stop a 29-inch tank cold. Tight hallway turns, thresholds, and stair landings are where a doorway tank gets stuck, so walk the full route from the entrance to the final position before you take delivery. And size your floor for the 3,753 lb loaded rating if you intend to use the full 1.5 specific gravity margin, rather than the lighter 2,502 lb water-only figure.
This Norwesco 300 gallon doorway tank ships LTL from the Burnet, TX plant, with freight quoted live to your ZIP. Lead time and freight scale with distance from Texas, so East and Northeast buyers should run the numbers up front on the Freight Cost Estimator. Then call 866-418-1777 to confirm fit, dimensions, and delivery before you order.
