The Chem-Tainer 4000 Gallon Vertical Liquid Storage Tank is a large-format black polyethylene tank built for high-volume water and liquid holding where a tall, compact footprint matters. It holds 4,000 gallons, stands 140 inches tall, and sits on a 95 x 95 inch base, so you get serious capacity without sprawling across the pad. It carries a 1.5 specific gravity rating, meaning it is engineered to handle liquids up to 50% heavier than water - so beyond plain water it covers denser, heavier-than-water solutions that a standard 1.0-SG water tank cannot, while keeping a wide safety margin on water service. This is an industrial, non-potable water and liquid storage tank; if you are specifying for drinking water, confirm potable suitability with us at 866-418-1777 before you order.
Will this 4000 gallon vertical tank work for my site?
This is a black vertical storage tank, a classic configuration for bulk water storage, irrigation supply, rural and remote fire-water reservoirs, and general liquid holding. The black color limits light penetration, which discourages algae growth in standing water. Run the load numbers before you pick a location: filled with water at full capacity the tank weighs roughly 33,360 pounds, and at its maximum rated contents (1.5 SG) it can reach about 50,040 pounds. That weight lands on a 95 x 95 inch footprint, so the foundation has to carry it. Plan a flat, fully supporting concrete pad sized for the wet weight - our concrete pad sizing guide walks through the ACI 360R-10 framework for above-ground poly tanks. At 140 inches tall, also plan top-fill access and confirm whether your jurisdiction requires wind or seismic anchoring - the ACI 318 boundary in that pad guide is the starting point. If you are still choosing a size, the Tank Sizing Calculator and Tank Sizing Guide help you match capacity to demand, and our 4000 gallon vertical tank buyer's guide covers the full decision in detail.
Specs, fittings, and the technical drawing
Capacity is 4,000 gallons; dimensions are 140 inches tall by 95 inches wide; material is polyethylene; specific gravity rating is 1.5. This tank's fitting and outlet configuration is defined by the technical drawing on this page - we have not pre-listed thread sizes here, so verify outlet size and placement against the drawing before ordering. The drawing is the authoritative reference for this tank's geometry and fittings; call us at 866-418-1777 if you need to match a detail to your plumbing plan.
Picking the right tank - and the mistake to avoid
The most common mistake on a tank this large is under-building the foundation. A full tank here is over 16 tons of water, and an uneven or undersized pad can stress the tank wall. Build the pad for the full wet weight, level it, and support the entire base. For cold-climate outdoor service, plan for freeze protection - standing water can freeze, and this tank ships with no insulation or heat. If you are weighing brands at the vertical-storage size, our Snyder vs Norwesco vs Chem-Tainer comparison lays out the differences, and for private fire-protection use, the fire-water reservoir design guide covers NFPA 22 sizing and the freeze-protection engineering for cold-climate service.
This tank ships LTL freight from the Hummelstown, PA plant, with freight quoted live to your ZIP code. Get a real number for your delivery address with our Freight Cost Estimator, or call 866-418-1777 to talk through delivery, offloading, and pad prep before you buy.
