The Norwesco 300 Gallon Doorway Water Tank (SKU N-44330) is a white polyethylene tank measuring 29" wide by 50" tall, sized so the 29-inch profile clears a standard doorway for placement in basements, equipment rooms, and other tight interior spaces a wider vertical tank can't reach. It holds 300 gallons and carries a 1.5 specific gravity rating, meaning the wall is built to hold contents heavier than plain water. For a water-storage, fresh-water, or rural fire-reserve role, this is a 300 gallon tank you can walk through a normal door and stand up where footprint is the constraint.
Will it work for your site?
At 300 gallons of plain water, plan for roughly 2,502 pounds of full water weight on the floor or pad beneath the tank, and confirm that surface can carry the load. The 1.5 SG rating gives the wall a maximum rated contents weight of about 3,753 pounds, so the same tank serves a fresh-water role and a denser-solution role (fluids up to 1.5 specific gravity) without changing tanks. Because the footprint is only 29 inches across, the tank stands taller for its volume than a squat vertical: it is 50 inches tall bare, so add lid and fitting height on top of that before comparing against your ceiling, basement, or doorway-room clearance. The doorway clears the door; the assembled tank still has to clear the room. To match gallons to an actual water demand or fire-reserve target, the Tank Sizing Calculator and the Tank Sizing Guide walk you through the sizing.
One thing to get right
The most common mistake on a doorway tank is treating the 1.5 SG rating as permission to skip checking your contents and your support structure: the rating describes what the polyethylene wall can hold, not what your floor can hold. Confirm the loaded weight against your slab or platform rating first. Second, order the right sibling — this is the 29"-wide x 50"-tall White version. If you need a narrower 25-inch footprint, a taller 65-inch sibling exists; see the 300 gallon doorway 25" x 65" buyer's guide, and the full 29" x 50" buyer's guide covers this exact configuration in depth. If you are pairing this tank with a private fire-protection reservoir, our guide to fire-water reservoir tank design for rural and remote sites covers NFPA 22 sizing discipline and cold-climate freeze protection for this size class.
Fittings and freight
Fitting size and outlet location are not published in this listing, so confirm them from the technical drawing on this page or by phone at 866-418-1777 before you buy bulkhead fittings or gaskets. The drawing also shows exact dimensional detail for the 29" x 50" body. On freight, this Norwesco doorway tank ships LTL, quoted live to your ZIP code, never bundled into the listed price. Because Norwesco molds this size at plants in Griffin, GA; Lancaster, OH; Owego, NY; Shawnee, OK; Sheldon, IA; and St. Bonifacius, MN, your freight is usually a shorter haul than a single-origin tank, since we ship from the location nearest you. Run your ZIP through the Freight Cost Estimator to see the figure from the closest plant, or call 866-418-1777 and we will quote it for you.
3 Year Warranty
