The 40 Gallon Vertical Liquid Storage Tank from Norwesco (part #41535) is a compact, free-standing vertical tank that holds 40 gallons of water or compatible liquids in an 18-inch diameter, 42-inch tall footprint. The natural white polyethylene lets you read the liquid level through the wall at a glance, and the narrow 18-inch base fits tight against a wall, in a utility closet, on a trailer, or beside larger process equipment where floor space is limited. As a Norwesco vertical storage tank, it covers the small-volume end of the same vertical line that runs all the way up to multi-thousand-gallon models.
Will this Norwesco vertical storage tank work for your job?
Filled with water, this tank carries 334 pounds of contents, so plan a level, supported surface that can take that load plus the weight of the tank itself. The wall is rated to a 1.5 specific gravity with a maximum rated contents weight of 500 pounds, which is the number that actually governs how much you can put in it. To size for a heavier-than-water liquid, multiply the full-water weight of 334 pounds by your liquid's specific gravity and keep the result under 500 pounds rather than simply filling to 40 gallons. Note the math at the top of the range: 334 pounds of water at a 1.5 specific gravity works out to roughly 500 pounds, so a full 40 gallons of a true 1.5-SG liquid sits right at the contents ceiling — fill just shy of the brim at the maximum rating. Our Tank Sizing Calculator and Tank Sizing Guide walk through capacity, weight, and footprint together if you are deciding between this and a larger tank.
Footprint, fittings, and configuration
This model stands on an 18-inch diameter base at 42 inches tall, so confirm at least 18 inches of level clearance and a surface rated for 500 pounds of contents plus the tank's own weight — useful to check before a closet, trailer, or skid install. For exact outlet, fitting, and bulkhead placement, see the technical drawing on this page; it shows the as-built fitting layout so you can confirm the tank matches your plumbing before you order. Because dimensions and fitting positions are best read directly off that drawing, use it as your reference for any inlet or outlet tie-in, and verify there that the supplied fitting and gasket materials suit your liquid: the weight rating governs load, while the resin, fitting, and gasket govern chemical service.
Freight: how this tank ships
This 40 gallon vertical tank ships LTL freight from the Norwesco plant in Burnet, Texas. Freight is quoted live to your ZIP code rather than bundled into the listed price, so you see the real delivery cost for your address before you commit. On a compact tank like this one, LTL to a distant ZIP can be a meaningful fraction of the listed price, so run our Freight Cost Estimator before you commit, or call 866-418-1777 and we will quote it for you.
The most common mistake on a tank this size is treating the 1.5 specific gravity rating as a license to fill any liquid to the brim — it is a weight rating, not a chemical clearance, so confirm your contents stay under 500 pounds and that polyethylene suits your application before filling. If you need more volume or more than 500 pounds of contents weight, step up within the same Norwesco vertical natural-white line — see the 300 gallon, 500 gallon, and 2000 gallon models. For a full walkthrough of this exact tank, read our 40 Gallon Vertical Liquid Storage Tank buyer's guide, then estimate freight to your ZIP or call 866-418-1777 to lock in your order.
3 Year Warranty
