The Enduraplas 1350 Gallon Plastic Vertical Liquid Storage Tank is a green polyethylene vertical tank built for bulk water and dense-liquid storage where you need real volume in a low-profile shape. It stands 71 inches tall on an 85 by 85 inch base, holds 1,350 gallons, and carries a 1.9 specific gravity rating - well above the 1.0 to 1.5 rating on most basic water tanks. If you are searching for a vertical storage tank that handles heavier-than-water liquids and fits under limited overhead clearance, this is the size and build to look at.
Will it work for your site?
Plan around the real load before you set the pad. Filled with water this tank carries roughly 11,259 pounds; loaded to its full 1.9 specific gravity rating it can carry up to about 21,392 pounds of contents. That weight lands on an 85 by 85 inch footprint, so the supporting surface must be flat, level, and continuous under the entire base - not just the edges. Note the geometry: at 71 inches tall this is a low-profile vertical that trades a larger 85 by 85 pad for reduced height clearance, which is genuinely useful under low buildings, eaves, or roofed enclosures where a taller tank will not fit. For sizing the slab under a load this heavy, the concrete pad sizing guide built on the ACI 360R-10 framework walks through the engineering. If you are still confirming whether 1,350 gallons fits your draw and refill cycle, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide first.
The 1.9 rating is more tank than a basic water rating
That 1.9 specific gravity rating means the same shell handles heavier brines, weighted slurries, and the kind of weighted fire-suppression water that a 1.0 specific gravity tank cannot. The mistake to avoid is treating the specific gravity rating as a chemical-service approval - it is not. The 1.9 number tells you the wall can carry a denser-than-water liquid; it does not tell you the polyethylene resin is compatible with a given chemical. This is a water-service tank as listed here. Confirm your liquid's actual specific gravity with the Tank Sizing Calculator and you may already have the load headroom you need. For fire-protection storage, the fire-water reservoir design guide covers NFPA 22 sizing and cold-climate freeze protection; for grey-water, rainwater, and HVAC condensate trains, see the industrial water reuse tank topology guide.
Fittings and inspection notes
The outlet, inlet, lid, and manway configuration is not listed for this SKU, so call 866-418-1777 to confirm the exact fitting package before you order. This matters more than it looks: bulkhead fittings and their gaskets have to be matched to the stored liquid - EPDM, Viton, or Buna depending on service - and the standard fitting package is sized for water service as listed. Also confirm height clearance before you set the tank: at 71 inches plus whatever rise the pad adds, the inlet and any top fittings need accessible headroom for fill and inspection. Over the service life of any large vertical poly tank, the wall section to watch is the vapor-saturated headspace near the top, where premature failures tend to originate even when the liquid-side wall still looks fine - the HDPE tank wall thickness guide explains why and how ASTM D1998 sizing logic addresses it.
This tank ships LTL by freight, quoted live to your ZIP code and routed from the nearer of our two stocking plants - Converse, TX or Neche, ND. On an 11,259 lb (water) to 21,392 lb (rated) load, that routing drives your cost, so a buyer far from both - say the East Coast - should expect freight priced from whichever plant is closer. Get a live number with our Freight Cost Estimator, or call 866-418-1777 and we will help you confirm sizing, the fitting package, and the best-routed freight for your location.
