Enduraplas 1650 Gallon Plastic Vertical Liquid Storage Tank in Black

The Enduraplas 1650 gallon vertical liquid storage tank is a black polyethylene tank built for bulk above-ground water and liquid storage, standing 75 inches tall on a 90-inch diameter (90 x 90 in. footprint envelope). The opaque black wall blocks light from the stored liquid, which is why this configuration suits rural fire-water reservoirs, irrigation supply, rainwater collection, and industrial process and reuse water. At 75 inches tall over a 90-inch base, it sits as a short, wide tank — a low profile that aids stability and lowers fill-head against the foundation.

Will this Enduraplas vertical tank work for your job?

This is a 1,650-gallon vertical storage tank rated to 1.9 specific gravity — heavier-duty than the typical 1.5-SG water tank, so the wall has headroom for denser liquids well beyond plain water at SG 1.0. Filled with water the contents alone weigh 13,761 lb, and the shell is rated to carry up to 26,146 lb of contents at its full 1.9 SG. Those are real standing loads — plan your slab and site access around them, not around the empty tank weight. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm 1,650 gallons matches your draw and refill cycle before you buy.

The mistake to avoid: pour the pad for the full load

The most common error with a vertical tank this size is treating it like a lighter unit and undersizing the foundation. A 90-inch base transferring better than 13,000 lb of water — or up to 26,000 lb of contents at the rated SG — demands a flat, fully supporting concrete pad sized for the standing load, not a gravel bed or a partial footing. Read our guide on concrete pad sizing for above-ground polyethylene tanks before site prep. If this is going into a private fire-protection system, our fire-water reservoir tank design guide walks the NFPA 22 sizing and cold-climate freeze-protection considerations.

Fittings and configuration

Confirm the outlet and fitting layout against the technical drawing on this page before ordering, since plumbing tie-in points and bulkhead positions drive your manifold design. Fittings and gaskets are configured at order — there is no assumed standard outlet, so call to confirm what your job needs. One honest caveat on the 1.9 SG rating: that figure covers wall strength, not the chemical resistance of seals. If you are storing anything denser than water, verify that every fitting, gasket, and bulkhead material is rated both for the specific liquid and for the higher hydrostatic head. If you are aggregating grey-water, rainwater, or HVAC condensate into a storage train, our industrial water reuse tank topology guide covers how to band quality and sequence treatment stages around a tank like this.

This Enduraplas vertical storage tank ships LTL freight, quoted live to your ZIP from whichever plant is cheaper to reach you — Converse, TX or Neche, ND. Because this is an oversized 75-inch load, get a real number on the Freight Cost Estimator, or call us at 866-418-1777 and we will quote the freight and confirm the fitting configuration before your order goes out.