The Enduraplas 340 Gallon Black Vertical Storage Tank is a 340-gallon polyethylene vertical tank built for outdoor and industrial water storage where UV exposure and algae control matter. The black wall blocks light to slow algae growth, and the vertical shape keeps a tall tank stable on a small pad: it stands 74 inches on a 40 x 40 inch base. If you are sizing a black vertical tank to a concrete pad or a tight equipment yard, the footprint and standing height are the two numbers to plan around.
- Capacity: 340 gallons
- Dimensions: 74 in H x 40 in W x 40 in L (40 x 40 in footprint)
- Material / color: Polyethylene, black
- Specific gravity rating: 1.9
- Weight full of water: ~2,836 lb; max rated contents ~5,388 lb
- Ships from: Converse, TX (LTL, quoted live to ZIP)
Will it work for your site?
This vertical storage tank is rated to a specific gravity of 1.9, which is well above water's 1.0. In plain terms, it is engineered to carry contents heavier than plain water, so it gives you headroom over a water-only tank rated near 1.0 to 1.1 if the use case ever changes. Filled with water the tank carries roughly 2,836 pounds; at its maximum rated contents weight the load reaches about 5,388 pounds. Those two numbers drive your pad and anchoring decisions far more than the empty tank weight does. The body is polyethylene in black, measuring 74 inches high by 40 inches wide by 40 inches long. Outlet, bulkhead, and lid placement are shown on the technical drawing on this page rather than estimated from the dimensions alone.
Sizing and site prep
A full tank of this size is a real structural load, so the pad has to be ready for it. Our Tank Sizing Calculator and Tank Sizing Guide help you match capacity to demand, and our guide to concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework for supporting a tank at this weight. If this black water storage tank is part of a rural fire-water reserve or a water-reuse setup, see our pieces on fire-water reservoir tank design and industrial water reuse tank topology.
The mistake to avoid
The most common error on a tank like this is underbuilding the foundation. People plan for the empty tank or for water weight alone and forget that the 1.9 specific gravity rating exists because this tank can legitimately hold denser contents up to roughly 5,388 pounds. Build the pad and any anchoring to the maximum rated load, not the water-only figure, and keep the full base in continuous contact with a level surface. The black wall helps with algae control on stored water, but it does not change the structural math under a full tank. Because fitting and outlet sizes are not fixed in a single configuration here, confirm the outlet, bulkhead, and lid you need against the technical drawing, or call 866-418-1777 before ordering.
This Enduraplas vertical tank ships LTL freight from a single plant in Converse, TX, with freight quoted live to your ZIP on the tank's shipping weight, so a ZIP closer to central Texas generally quotes lower. Get your number with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and confirm the right tank for your application.
