Norwesco 6500 Gallon HD Vertical Storage Tank W/O Fitting in White

The Norwesco 6500 Gallon HD Vertical Storage Tank (N-42361) is a heavy-duty white vertical tank built for bulk liquid storage where you need real capacity in a stable, gravity-friendly footprint. It stands 147" tall on a 120" diameter base, holds 6,500 gallons, and ships without a fitting so you specify the outlet and bulkhead your install actually needs rather than reworking a pre-drilled tank. It is molded in FDA-approved high density linear polyethylene (HDLPE) and rated for ambient, cold-service duty with a maximum service temperature of 120 F (48 C) — no hot-fill.

Will this tank work for my liquid?

This is the HD (heavy-duty) build, rated to a 1.9 specific gravity — meaning it is structurally engineered to carry contents up to 1.9 times the weight of water. That high SG rating is the premium feature here: it lets you store denser liquids (brines and some fertilizers or chemicals, pending compatibility confirmation) that would exceed a standard 1.5-SG vertical tank's wall rating. A quick note on the "FDA Approved" listing — that is the resin/material approval (FDA-compliant polyethylene for food-contact), not an NSF/ANSI 61 potable-water system certification. Always confirm chemical compatibility for your specific liquid before use, and remember the 120 F / 48 C ceiling rules out hot-fill or continuous high-heat service.

Fittings, weight, and the pad

The tank ships with a 16" lid for access and no pre-installed bulkhead (W/O Fitting), so plan before you drill: select a bulkhead fitting sized to your outlet, pair it with a chemical-appropriate gasket (EPDM, Viton, or similar per your liquid), and confirm the outlet location up front. On weight — empty, the tank is 1,506 lb. Filled with water it carries roughly 54,210 lb of contents, and at its full 1.9 SG rating the contents can reach about 102,999 lb, so the foundation is not an afterthought. A 6,500-gallon vertical tank on a 120" diameter footprint needs a properly engineered, level, fully-supporting concrete pad. Run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide, and for the foundation see our guide on concrete pad sizing for above-ground polyethylene tanks. For a full walkthrough of this size, see our 6500 gallon vertical (120" x 147") buyer's guide, and for full dimensions and 16" lid placement, see the technical drawing on this page.

The mistake to avoid

Because this tank ships without a fitting, the common misstep is treating the 1.9 SG rating as license to skip the pad engineering — a full tank near max rating is over 100,000 lb of load. Match your outlet, gasket, and bulkhead hardware to your specific liquid, confirm the pad carries the fully-loaded weight, and if this is headed for rural fire-water reservoir duty, our NFPA 22 sizing and freeze-protection guide covers the full stack — freeze protection on a 120 F-max poly tank is always external.

This 6,500 gallon Norwesco vertical ships LTL freight, quoted live to your ZIP from the nearest stocking plant — Albertville, AL or Fairfield, TX. Get a freight quote to your ZIP in seconds with the Freight Cost Estimator, or call 866-418-1777 to lock in your outlet configuration and freight.