300 Gallon 15 Degree Cone Bottom Tank: Complete Buyer's Guide
A 300-gallon 15-degree cone-bottom tank from Norwesco for mid-small batch and mixing that drains clean between runs, 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 300-gallon 15-degree cone-bottom tank is a mid-small batch and mixing vessel that drains completely between runs — the right size for a dosing-and-blend station or a settling-and-decant process that needs to empty clean. The shallow 15-degree cone keeps the tank's 82-inch height in check on a compact 36-inch diameter while still clearing free-flowing liquids to the center outlet. The shell weighs 93 pounds.
Rotomolded as one seamless piece of virgin linear polyethylene, it is rated to 1.5 specific gravity — dense liquids to 12.5 pounds per gallon. Through the translucent white wall you read the level by eye, the wall reflects sun to keep contents cooler, and the resin is FDA-compliant for food-grade liquids.
The cone sits on a stand that carries the full load — about 3,846 pounds at the rated gravity — through its flange and legs, never the apex. The 2-inch center outlet is factory-fitted and leak-tested, and the 8-inch lid opens the top for fill and inspection. Norwesco's 3-year warranty applies.
Key Features and Specifications
- 300-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
- 82" tall x 36" diameter — compact vertical footprint
- 93 lbs empty, approximately 3,846 lbs when full at rated specific gravity
- 2" NPT outlet fitting — factory installed and leak-tested
- 8" 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
The 300-gallon cone is light enough to handle yet tall enough that a stable stand and a flat pad matter. As always with cone tanks, the stand carries the load and the apex carries nothing.
Site Preparation and the Stand
Mount the tank on a compatible stand rated for the full load, set on a level surface of compacted gravel or a concrete pad. Keep the slim 82-inch profile from leaning by setting the stand truly level so all legs share the load. Never rest the cone tip on the ground, and add a sealed surface or tray for a concentrate.
Placement and Connections
A foot of working room around the tank covers service. Plumb the 2-inch center outlet down into a full-port valve with a short chemical-rated flexible connection to preserve the complete-drain advantage, and match the valve and seals to the chemistry.
Venting
Fit a lid vent so the tank breathes on fill and drain, and a chemistry-rated relief vent for off-gassing contents.
Maintenance and Long-Term Care
Inspect the stand, the cone, the seals, and the vent each quarter — the cone tank essentials.
Quarterly Inspection Checklist
- Stand: confirm it is sound, level, and loading all legs evenly with no settling.
- Cone and shell: inspect the cone and the cone-to-sidewall transition for stress whitening or bulging.
- Outlet and seals: check the 2-inch valve and gaskets for chemical attack and free operation; hand-snug only.
- Vent: verify the lid vent is clear.
Cleaning and Chemical Changeover
The complete-draining cone rinses clean between batches without a residual heel. Decontaminate to the chemical manufacturer's protocol, capture the rinsate for disposal, and check the next chemical against the polyethylene and seals before refilling.
UV and Weather Protection
The white wall is not fully opaque; keep light-sensitive or algae-prone contents shaded under strong sun and check the wall annually.
Alternatives and Comparisons
The 300-gallon 15-degree cone is the step up from the 100 for batch work — the shallow angle keeps height down while still draining free-flowing liquids. A flat-bottom 250- or 300-class vertical stores similar volume without a stand if drainage is not required; a steeper cone clears thicker mixes at greater height. For larger batches, the 500-gallon cone follows.
Other 300-Gallon Options
Frequently Asked Questions
How long will the 300 Gallon 15 Degree Cone Bottom Tank last?
Within its 1.5 SG and 120 F ratings, with compatible chemistry and a sound, level stand, expect 15 to 20 years. The stand's condition and seal compatibility govern the real-world life more than the seamless shell, which has no joint to fail.
What chemicals can I store in this tank?
Its 1.5 specific gravity rating suits ag chemicals, fertilizers, and industrial solutions within that range, in FDA-compliant food-grade resin. Not for fuels, solvents, or flammables. Confirm your chemistry and your seal stock on a compatibility chart before the first fill.
What kind of foundation does a 300-gallon tank need?
The cone has no flat base, so the foundation supports a stand rated for the full 3,846-pound load, which carries the tank through its flange and legs and never the apex. Set the stand truly level on a compacted gravel pad or a concrete slab so all legs share the load and the slim 82-inch profile does not lean. Never rest the cone tip on the ground.
Does this tank come with a warranty?
Norwesco's warranty runs three years and covers factory molding flaws, pinholes, and fitting defects. Not covered: overloading, an undersized stand, chemical attack, or impact. Keep your receipt for any claim.
Can I install this tank underground?
No. This stand-mounted, above-ground cone tank is not designed for burial. Any below-grade need calls for an underground-rated tank.
Buying Considerations
Confirm a compatible stand set on a flat pad, a chemical at or under 1.5 SG compatible with the polyethylene and seals, and spill control where warranted. Delivery is LTL on a pallet, with a residential lift-gate option available.
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