750 Gallon 20 Degree Cone Bottom Tank: Complete Buyer's Guide
A 750-gallon 20-degree cone-bottom tank from Norwesco, the low-profile self-drainer for buyers supplying their own stand, in 1.5-specific-gravity polyethylene.
Specifications at a Glance
Every figure below is pulled straight from the live product record for this exact tank — the same data on the product page, so what you read here and what you buy never disagree.
Standards & Materials
- ASTM D1998 — Standard Specification for Polyethylene Upright Storage Tanks. Governs wall-thickness and hydrostatic design for vertical rotomolded poly tanks of this class.
- FDA 21 CFR 177.1520 — Olefin polymers. The food-contact regulation the FDA-grade resin in this tank is compounded to meet.
- Specific gravity rating 1.5 — the tank is engineered for liquids up to 1.5× the density of water (water is about 8.34 lb/gal). Confirm your fluid’s SG before storage.
Product Overview
The 750-gallon 20-degree cone-bottom tank is the self-draining vessel for buyers who already have suitable support or want to spec their own stand. The shallow 20-degree cone drains thin-to-medium liquids completely to the center outlet while keeping the overall height modest — 56 inches tall on a 72-inch diameter for the bare tank — which makes it the lower-profile choice among 750-gallon cones. The bare shell weighs 159 pounds.
Rotomolded seamlessly from virgin linear polyethylene and rated to 1.5 specific gravity, it carries dense liquids to 12.5 pounds per gallon. The translucent white walls reveal the level through the side and reflect sun to keep contents cooler; the resin is FDA-compliant for food-grade liquids.
This tank ships without a stand, so you must provide a stand rated for the full load — about 9,542 pounds at the rated gravity — that carries the tank through its flange and legs, never the cone apex. Clean center draw comes from the leak-tested, factory-fitted 2-inch cone-tip outlet, with a 16-inch lid for fill and inspection.
Technical Drawing
Official Norwesco technical drawing — 750 Gallon 20 Degree Cone Bottom Tank
Key Features and Specifications
- 750-gallon capacity — sized for full-drain mixing and batch processing
- Constructed from virgin linear polyethylene (HDPE) with 1.5 specific gravity rating — handles liquids up to 12.5 lbs/gal
- 56" tall x 72" diameter — compact vertical footprint
- 159 lbs empty, approximately 9,542 lbs when full at rated specific gravity
- 2" NPT outlet fitting — factory installed and leak-tested
- 16" lid opening for fill, venting, and interior access
- FDA approved for potable water and food-grade liquid contact
- Translucent white walls allow visual level monitoring without opening the tank and reflect sunlight to keep contents cooler
- Rated for continuous service up to 120 F / 48 C
- Seamless one-piece rotational molding — no seams, no welds, no leak points
- Manufactured by Norwesco — a leading name in rotomolded polyethylene tanks
- Must be installed on the manufacturer-supplied or compatible stand rated for the full loaded weight. Never rest a cone bottom tank directly on its apex
- Ships via LTL freight — allow 2-3 weeks for delivery. Lift gate and residential delivery available at additional cost
Installation and Setup Guide
Since this tank comes without a stand, sourcing the right one is your first and most important step. The stand carries the entire load; the cone apex carries none of it.
Site Preparation and the Stand
Provide a manufacturer-compatible stand rated for the tank's full 9,542-pound load, sized for the 72-inch diameter and the 20-degree cone. Set the stand on a four-inch compacted gravel pad or a concrete slab, finished flat so all legs share the load evenly, and anchor it per its specifications. Never rest the cone directly on the ground or on an undersized support. Add containment where the chemistry warrants it.
Placement and Connections
Choose stand height so there is room for a full-port valve and a drain line beneath the cone outlet. Run the 2-inch center outlet straight down into a short, chemical-rated flexible connection so the cone's complete drain reaches the discharge, and match the valve and seals to the chemistry.
Venting
Vent through the lid so the tank breathes on fill and drain, and fit a chemistry-rated relief vent for off-gassing contents.
Maintenance and Long-Term Care
Because the stand is yours to provide, inspect it as rigorously as the tank — it is the structural element that keeps the cone off the ground.
Quarterly Inspection Checklist
- Stand: check legs, welds or joints, and fasteners for corrosion, cracks, or loosening, and confirm even leg loading and no settling.
- Cone and shell: inspect the 20-degree cone and the cone-to-sidewall transition for stress whitening or bulging.
- Outlet and seals: inspect the center valve and its gaskets for chemical attack, verify free operation, and hand-snug poly threads only.
- Vent: verify the lid vent is clear.
Cleaning and Chemical Changeover
The complete-draining cone rinses clean at changeover without a residual heel. Decontaminate to the chemical manufacturer's protocol, contain and dispose of rinsate per the label and local rules, and verify the incoming chemical against the resin and seals before refilling.
UV and Weather Protection
The white wall is not opaque, so keep algae-prone or light-sensitive contents shaded in strong sun and inspect the wall yearly.
Alternatives and Comparisons
This is the stand-not-included 750 with a 20-degree cone — the lowest-profile 750-gallon cone and the value pick if you already have support. If you would rather it arrive complete, the same tank ships bundled with a matching poly stand; for heavier sludges, the 45-degree 750 clears thicker solids at greater height. No drainage requirement at all? The flat-bottom 750 vertical needs no stand.
Other 750-Gallon Options
Frequently Asked Questions
How long will the 750 Gallon 20 Degree Cone Bottom Tank last?
With compatible chemistry, a properly rated stand kept sound, and use within its 1.5 SG and 120 F limits, expect 15 to 20 years. Because you supply the stand, its integrity is on you — maintain it and the seamless tank reaches the long end of that range.
What chemicals can I store in this tank?
The 1.5 specific gravity rating covers agricultural chemicals, fertilizers, and industrial solutions of that weight, with food-grade FDA-compliant resin. Not for fuels, solvents, or flammables. Confirm the chemical and the seals on a compatibility chart before you charge the tank.
What kind of foundation does a 750-gallon tank need?
This tank ships without a stand, so you provide one: a manufacturer-compatible stand rated for the full 9,542-pound load that carries the tank through its flange and legs — never the cone apex. Set the stand on a level four-inch gravel pad or concrete slab so all legs share the load, and anchor it per spec. Never rest the cone directly on the ground.
Does this tank come with a warranty?
Under normal use Norwesco warrants the tank against manufacturing defects — molding voids, pinholes, and factory fitting flaws. Not covered: overloading, a stand that is undersized or damaged, chemical attack, or impact. Keep your receipt for any claim.
Can I install this tank underground?
No. Cone-bottom tanks are stand-mounted, above-ground vessels — burial is not an option. If you need below-grade storage, choose tankage engineered for underground service.
Buying Considerations
Three checks before ordering: a compatible stand rated for the full load (this tank does not include one), set on a flat pad; a chemical at or under 1.5 SG compatible with the polyethylene and seals; and a freight plan, since this tank ships LTL by flatbed and needs a forklift to unload. Tell us whether you need a stand and we will help you spec the complete package.
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Questions? Call (866) 418-1777 — our team knows these products inside and out and can help you select the right tank for your application.
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