A 500-gallon cone-bottom tank that ships complete with its matching poly stand — no separate structure to source or size. The 30° cone drains every gallon to the apex outlet, and the included stand carries the load correctly through the support ring. Standing 87 inches mounted, its 1.5-specific-gravity wall is rated for chemicals up to 12.5 pounds per gallon.

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.

Manufacturer	Norwesco
Manufacturer Part #	N-40289
Nominal Capacity	500 Gallons
Footprint (Diameter)	49"
Overall Height	87"
Empty Weight	209 lb
Material	Polyethylene (HDPE)
Color	Natural White
Rated Specific Gravity	1.5
Certifications	FDA Approved
Warranty	3 Year
Shipping	Ships LTL motor freight

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 500 Gallon 30 Degree Cone Bottom Tank with Poly Stand solves the cone tank's one logistical headache by including the stand in the package. You receive a tank engineered to drain completely and a poly stand built to fit it, so the cone is supported through its molded ring rather than balanced on the fragile apex — exactly as a cone tank must be.

The value is in the complete drainage and the turnkey support. The 30-degree cone funnels the full contents and any settled solids to the single 2-inch apex outlet, leaving no heel and no trapped product between batches. Mounted on its stand the tank reaches 87 inches, keeping the outlet high enough to gravity-feed a container or prime a pump. Translucent white walls let you watch the level and mix, and reflect sun to limit heat in the contents.

The combined empty weight of tank and stand is 209 pounds. Charged with a 1.5-SG liquid the assembly reaches about 6,464 pounds — a bit over three tons carried through the stand's legs into the ground, not by the tank floor. The 16-inch lid serves filling, agitation, and access. No inlet fitting ships from the factory.

The tank is molded seamlessly with UV stabilizer in the resin and a 3-year Norwesco defect warranty. Because it arrives as a tank-and-stand combo, plan a little extra unloading care for the assembled height.

Technical Drawing

Official Norwesco technical drawing — 500 Gallon 30 Degree Cone Bottom Tank with Poly Stand

Key Features and Specifications

500-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
87" tall x 49" diameter — compact vertical footprint
209 lbs empty, approximately 6,464 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
3 Year Warranty from Norwesco against manufacturing defects
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 on a pallet — residential delivery with lift gate available

Installation and Setup Guide

With the stand included, installing this combo is simpler than a stand-separate cone — but the principle is unchanged: the load rides through the stand, so the stand's footing and levelness are the safety-critical parts of the job.

Site Preparation

Set the poly stand on a firm, level surface that supports its footprint — a slab or a well-compacted pad. Level the stand dead-true so the cone hangs straight and drains evenly to the center; a tilted stand strands product on the high side of the cone. Confirm the ground can carry the roughly three-ton full load concentrated under the stand's feet.

Placement and Connections

Seat the tank fully in the stand's support ring before adding liquid and verify the apex hangs clear. Plumb the 2-inch apex outlet with a full-port valve so product clears without bridging, using schedule-80 PVC or stainless and a flex section before rigid pipe. Keep the run short and accessible — the apex valve is the working heart of a drain-clean tank.

Venting

A cone drains fast through its apex, which can pull a vacuum if the vent cannot keep up. Size the lid vent to your drain rate, and for any chemical that off-gasses use a pressure-vacuum relief vent rated for the vapor.

Maintenance and Long-Term Care

The included stand joins the tank on your inspection list, and since it carries the load it gets first attention. A quarterly routine covers both.

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Quarterly Inspection Checklist

Poly stand: Check the stand's legs, joints, and footing for cracking, distortion, or movement under the three-ton load.
Cone and ring: Confirm the tank sits evenly in the support ring and look for stress whitening at the cone shoulder.
Apex outlet: Verify the 2-inch valve seals and drains freely with nothing bridged above it.
Vent: Maintain a clear lid vent so a fast drain cannot draw the wall into vacuum.

Cleaning

Cleanup is the cone's strong suit: open the apex valve and the tank self-drains almost completely. Through the 16-inch lid, flush with a solution that neutralizes the prior chemical, let the cone drain it, and repeat when switching incompatible products. Collect the rinse runoff and dispose of it per the relevant safety data sheet.

UV and Weather Protection

The elevated tank presents a tall south wall; check it annually for chalking. A poly stand resists weather well, but inspect it for sun embrittlement over the years just as you would the tank.

Alternatives and Comparisons

This combo's edge is convenience: tank and matched stand together, ready to plumb. A stand-separate 500 cone costs less up front but requires you to source and size a compatible, load-rated stand yourself. If you do not need complete drainage, a flat-bottom 500 vertical is cheaper, lower, and simpler — but it strands a heel above its outlet. And for storing water rather than chemistry, a water-grade flat-bottom tank is the economical choice since it skips both the cone and the 1.5-SG wall.

Frequently Asked Questions

How long will the 500 Gallon 30 Degree Cone Bottom Tank with Poly Stand last?

Fifteen to twenty years is realistic when the tank stays within its 1.5 specific-gravity rating, sits squarely in its stand, and holds compatible chemistry. The seamless mold and in-resin UV package make the shell durable; with a cone tank, the included stand is part of that lifespan too, so keep it sound. Beyond that, early failures come from overloading, a clogged-vent vacuum, or attack by an incompatible chemical.

What chemicals can I store in this tank?

At 1.5 SG it suits most fertilizers, ag chemicals, and many acids and bases up to 12.5 pounds per gallon, and the cone makes it ideal for products that settle or need full recovery between batches. Such products are compatible with polyethylene; strong oxidizers, many solvents, and flammable fuels are not. Check your specific chemical against a polyethylene compatibility chart and its specific gravity before you fill.

What kind of foundation does a 500-gallon tank need?

Because the load goes through the included stand, the foundation supports the stand's feet, not a slab under the tank. A full load is about 6,464 pounds, so set the stand on a firm, level slab or compacted pad able to carry that concentrated weight, and level it so the cone drains true.

Does this tank come with a warranty?

Yes, the tank carries a three-year Norwesco warranty for manufacturing defects, including molding flaws and pinholes. It excludes overloading past 1.5 SG, chemical attack, resting the cone on its apex, and impact damage. File the purchase receipt and installation images in case you ever claim.

Can I install this tank underground?

No. This is an above-ground, stand-mounted cone tank designed for gravity drainage above grade; its geometry is wrong for burial and would fail under soil pressure. For below-grade needs, choose a purpose-built underground cistern instead.

Buying Considerations

Three things to confirm before ordering this combo. First, the assembled height — 87 inches mounted means planning lid access and apex-valve clearance underneath. Second, the stand footing — three tons full rides through the stand's feet, so provide a firm, level base for them. Third, the liquid and freight — stay at or under 1.5 specific gravity, and expect the tank-and-stand to ship on a pallet with lift-gate unloading. Call us with any questions on the combo.