A 1,050-gallon cone-bottom tank with a 20° cone — a shallower slope that keeps overall height down while still draining to a central outlet. Standing 86 inches on its required stand with a 2-inch apex outlet, this Norwesco vessel suits mixing and batch work where headroom is limited. 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-40356
Nominal Capacity	1050 Gallons
Footprint (Diameter)	72"
Overall Height	86"
Empty Weight	204 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 1050 Gallon 20 Degree Cone Bottom Tank offers complete-drain capability in a lower-profile package than a steep-cone tank of the same volume. The 20-degree cone is the key choice here: it is shallower than a 30-degree cone, so the tank stands less tall on its stand and fits under lower roofs, while still funneling thin-to-moderate liquids to the central 2-inch outlet.

Like every cone tank, it rides on a stand and never on its apex, with the load carried through the support ring. Mounted, it reaches 86 inches — a manageable height that keeps the outlet usefully elevated for gravity feed without towering. Translucent white walls let you watch the mix and level, and reflect sun to limit heat. The shallower cone drains free-flowing product well; for thick slurries that need a steeper pitch, a 30-degree cone is the better match.

The tank shell is 204 pounds empty. Charged with a 1.5-SG liquid it reaches about 13,340 pounds — roughly six and a half tons carried through the stand into the ground. The 2-inch apex outlet handles drainage, and the 16-inch lid serves filling, agitation, and access. No inlet ships from the factory, and a compatible stand is required.

The tank is molded seamlessly with UV stabilizer in the resin and Norwesco's defect warranty. It ships by LTL freight, which we coordinate with you.

Technical Drawing

Official Norwesco technical drawing — 1050 Gallon 20 Degree Cone Bottom Tank

Key Features and Specifications

1,050-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
86" tall x 72" diameter — compact vertical footprint
204 lbs empty, approximately 13,340 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

As with any cone tank, the engineering is in the stand. The shallower 20-degree cone lowers the height but does not change the rule: the load must ride through a stand and support ring, never the apex, so the stand and its footing are the safety-critical elements.

Site Preparation

Provide a foundation for the stand, not a slab under the tank. The stand concentrates roughly six and a half tons of full load into its legs, so each footing needs a pad able to carry that point load — sized by a structural professional for your soil. Set the stand dead-level so the cone drains evenly to the center; a tilted stand strands product on the high side of the shallow cone, which has less slope to compensate.

Placement and Connections

Seat the tank fully into the support ring before filling and confirm the apex hangs clear. Plumb the 2-inch apex outlet with a full-port valve, using schedule-80 PVC or stainless and a flex section before rigid pipe. Keep the run short and accessible. Because the 20-degree cone is shallow, route the outlet to drain freely without low spots that could trap product.

Venting

A cone empties quickly through its apex and can pull a vacuum if the vent lags. Size the lid vent to your drain rate, and for any off-gassing chemical use a pressure-vacuum relief vent rated for the vapor.

Maintenance and Long-Term Care

The stand joins the tank on your inspection list and, since it carries the load, gets first attention. A quarterly check takes in both.

Quarterly Inspection Checklist

Stand: Inspect legs, welds or bolts, and footings for corrosion, cracking, or movement under the six-and-a-half-ton load.
Cone and ring: Confirm even seating in the support ring and check for stress whitening at the cone shoulder.
Apex outlet: Verify the 2-inch valve seals and the shallow cone drains freely, with nothing bridged above it.
Vent: Ensure the lid vent stays unobstructed so quick draining never creases the wall.

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Cleaning

Open the apex valve to self-drain most of the contents, then rinse from the 16-inch lid with a solution that neutralizes the previous chemical and let it clear through the cone. Because the cone is shallow, give thicker residue an extra rinse to ensure it clears. Gather the rinse and dispose of it as the product's safety data sheet requires.

UV and Weather Protection

The elevated tank presents a south wall to the sun; check it annually for chalking. Keep a steel stand painted or galvanized against corrosion, since the structure carries the whole load.

Alternatives and Comparisons

The defining choice is cone angle. This 20-degree cone keeps height down and drains free-flowing liquids well — ideal where roof clearance is limited. A 30-degree cone of the same volume drains thicker product more aggressively but stands taller. If you do not need complete drainage at all, a flat-bottom 1,000- or 1,100-gallon vertical is cheaper, lower, and simpler, accepting a small residual heel. And if you want this exact tank without sourcing a stand, the matching combo ships with a fitted poly stand included.

Frequently Asked Questions

How long will the 1050 Gallon 20 Degree Cone Bottom Tank last?

A fifteen-to-twenty-year life is reasonable when the tank is kept within 1.5 SG, supported on a sound stand, and used with compatible products. The seamless mold and in-resin UV protection make the shell durable; a cone tank's life also rides on its stand, so keep the structure sound. Overloading the wall, a vent that clogged and pulled a vacuum, and chemical attack round out the early-failure list.

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 aids products that need full recovery between batches — the shallower 20-degree cone favors free-flowing liquids over thick slurries. Those are well within polyethylene's resistance, unlike strong oxidizers, many solvents, or any flammable fuel. Confirm compatibility on a poly chart and verify the product's density before the tank goes into service.

What kind of foundation does a 1050-gallon tank need?

The load goes through the stand, so the foundation supports the stand's legs, not a slab under the tank. A full load is about 13,340 pounds, so each leg footing must be a pad engineered for that point load, set dead-level so the shallow cone drains true. A structural professional should specify the footings for your ground conditions.

Does this tank come with a warranty?

Yes, Norwesco backs the tank against defects in materials and workmanship — molding flaws, pinholes, and factory fitting defects. It excludes overloading past 1.5 SG, chemical attack, resting the cone on its apex, an inadequate stand or footing, and impact damage. Hold on to the invoice and install photos for warranty documentation.

Can I install this tank underground?

No. This is an above-ground, stand-mounted cone tank designed for gravity drainage above grade; its geometry would fail under soil pressure if buried. Below grade, use an underground cistern designed for the job.

Buying Considerations

Three things to settle before ordering. First, the stand — this tank cannot stand alone, so confirm a compatible, load-rated stand and an engineered footing plan for six and a half tons through its legs (or choose the combo with a stand included). Second, the cone angle — the 20-degree slope keeps height down and suits free-flowing liquids; pick a 30-degree cone for thick slurries. Third, the liquid and freight — stay at or under 1.5 specific gravity, and expect LTL delivery. Call us to match the right stand.