300 Gallon 30 Degree Cone Bottom Tank with Poly Stand: Complete Buyer's Guide
Three hundred gallons of batch capacity on a 30-degree cone, delivered with the poly stand already matched to the load. The 49-inch-wide body and 2-inch tip outlet make it a serious processing vessel, while the included corrosion-proof stand turns it into a turnkey mixing station rather than a parts list.
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
Doubling the batch from a 175-gallon cone changes the equation in two ways: the loaded weight climbs sharply, and the stand becomes a more critical component. The 300 Gallon 30 Degree Cone Bottom Tank with Poly Stand handles both by shipping as a matched system — the polyethylene stand is engineered for this tank's full charge, so the heavier load never becomes the buyer's engineering problem.
The 30-degree cone drains a 300-gallon batch completely between cycles while keeping overall height reasonable on the stand. At 49 inches in diameter and 61 inches tall, the body is broad and substantial — a fixed processing station, not a portable vessel. Empty it weighs 159 pounds, but a full charge at the 1.5 specific-gravity rating reaches about 3,912 pounds, nearly two tons funneled through the cone into the included stand. That weight is exactly why a matched, correctly rated stand matters at this size.
The fittings are built for real throughput. A 2-inch NPT outlet at the cone tip drains the batch or feeds a transfer pump without choking, and the 16-inch lid is wide enough for bulk charging, a mounted agitator, and interior cone cleanout. The translucent white wall keeps the level visible in a tank too large to open casually, and Norwesco's seamless rotational mold leaves no weld seam across the vessel. The all-polyethylene stand resists corrosion in the same wet, chemical-splash environment the tank lives in — no rusting steel frame to replace.
This is chemical-process equipment rated to 1.5 specific gravity — built to batch and meter agricultural and industrial solutions, not to store potable water — backed by Norwesco's 3-year manufacturing warranty.
Technical Drawing
Official Norwesco technical drawing — 300 Gallon 30 Degree Cone Bottom Tank with Poly Stand
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
- 61" tall x 49" diameter — compact vertical footprint
- 159 lbs empty, approximately 3,912 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 and rated, installing this 300-gallon batch station is mostly about giving nearly two tons a solid, level place to live.
Assembling and Siting the Poly Stand
Assemble the included polyethylene stand on a hard, level surface and confirm it is square before seating the tank. The stand is rated for the full charge — about 3,912 pounds at 1.5 specific gravity — so the load rating is handled, but the floor beneath it must carry nearly two tons without settling. Reinforced concrete is the right surface at this weight. Cradle the cone fully in the stand with the tip hanging free; even with the stand in place, the cone apex is never a bearing point.
Plumbing the 2-Inch Outlet
Plumb the 2-inch NPT cone-tip outlet with a full-port valve and a short, straight run so the 30-degree cone drains a 300-gallon batch cleanly. Allow for thermal movement in the connection and take the first segment in chemical-rated flexible hose; a vessel this size moves its fittings enough through fill-and-drain and temperature cycles to fatigue a rigid pipe.
Agitation and Ventilation
At 300 gallons, agitation is a planned installation: mount the mixer centered over the lid or a dedicated nozzle so the cone is loaded squarely, and support heavy agitators independently of the tank wall. Mix in a ventilated area, keep the lid seated during agitation to contain the larger splash, fit a vent matched to the chemistry, and integrate the station into your spill containment. Keep eyewash within reach of the working face.
Maintenance and Long-Term Care
A two-ton batch station rewards a disciplined routine: drain the cone clean, watch the 2-inch valve, inspect the poly stand at its load points, and decontaminate fully between products.
Between-Batch Inspection
- Cone evacuation: Verify the 30-degree cone drains to a dry tip after each batch. On a wide cone, product trapped in one quadrant means the stand or floor has gone out of level.
- 2-inch valve: Cycle the full-port tip valve and check the seat; the volume passing through it each batch wears the seat over time.
- Poly stand load points: Inspect the polyethylene stand where the cone bears on it for stress whitening or cracking, and confirm the floor under each foot has not settled under the near-two-ton load.
- Wall survey: Backlight the wall, focusing on the lower section where hydrostatic load concentrates, for crazing, bulging, or swelling.
Decontamination Between Chemistries
Execute a full decontamination of the tank, cone, agitator, and 2-inch outlet to the chemical manufacturer's procedure before switching products. A 300-gallon vessel with an agitator holds residue in many places, and cross-contamination at this batch size is costly. This is process equipment and is never converted to potable service.
Long-Term Care
Out of direct sun, both the tank and its poly stand age slowly — the corrosion-proof stand is a long-term advantage over steel in a chemical environment. The watch items are the floor under the loaded stand, the tip valve, and the lower wall's hydrostatic zone. Keep an inspection log and spare consumables on hand.
Alternatives and Comparisons
The 300 Gallon 30 Degree Cone Bottom Tank with Poly Stand sits between mid-size and bulk cone tanks, and its differentiator is the matched, corrosion-proof stand at a weight where the stand really counts.
Bundled stand at two tons: At a roughly 3,912-pound full charge, an undersized or rusting stand is a genuine hazard, not just an inconvenience. This unit ships with a polyethylene stand engineered for that load, so the most failure-prone part of a cone-bottom setup is handled and will not corrode in a wet chemical area. Sourcing an equivalent rated steel stand separately costs more and rusts.
Cone vs. flat-bottom at 300 gallons: If you batch and need complete drainage every cycle, the 30-degree cone is the reason to buy. A flat-bottom 300-gallon tank stores the same volume cheaper but strands a heel on its floor. Choose the cone-and-stand bundle for processing throughput; choose flat-bottom for static storage.
Other 300-Gallon Options
Frequently Asked Questions
How long will the 300 Gallon 30 Degree Cone Bottom Tank with Poly Stand last?
With compatible chemistries on its included poly stand and out of direct sun, the seamless shell readily exceeds 15 years, and the all-polyethylene stand will not corrode beneath it — a meaningful edge over steel frames at this near-two-ton weight in chemical-splash conditions. The life-limiting items are the 2-inch tip valve, the lid gasket, and the floor under the loaded stand. Decontaminate between products, inspect the cone and stand after each batch, and the station gives long service.
What chemicals can I store in this tank?
This is chemical-process equipment rated to 1.5 specific gravity, built to batch and meter agricultural and industrial solutions within that density — liquid fertilizers, surfactants, wettable powders, and water-based cleaning chemistries. It is not for drinking water and never for fuels, solvents, or flammables. At this batch size an incompatible chemistry is expensive to discover, so verify every product against a polyethylene compatibility chart first.
What kind of foundation does a 300-gallon tank need?
The matched poly stand ships with the tank and is the foundation — engineered for the full charge of about 3,912 pounds at 1.5 specific gravity, so no separate stand calculation is needed. What you must provide is a hard, level surface capable of carrying nearly two tons without settling; reinforced concrete is appropriate at this weight. Even with the stand, never rest the tank on its cone tip, which carries the 2-inch outlet.
Does this tank come with a warranty?
Yes — Norwesco's 3-year warranty covers material and workmanship defects in the tank when used within its ratings, including molding flaws around the 2-inch outlet. It does not cover chemical attack from an incompatible product, a cone damaged by tip-loading, a wall stressed by a settling floor, or normal valve and gasket wear. Keep your invoice and a photo of the tank correctly seated in its poly stand.
Can I install this tank underground?
No. The cone and stand are engineered for above-ground batch processing; the cone has no structural role underground and the tank is not built to resist soil and groundwater pressure. Burial would void the warranty and risk collapse. Keep the station above ground on its poly stand, and use a purpose-built underground tank with ribbed, reinforced walls for any below-grade storage.
Buying Considerations
Three checks before ordering the 300 Gallon 30 Degree Cone Bottom Tank with Poly Stand. First, the floor — the included stand carries the load rating, but it must sit on a hard, level surface (reinforced concrete is right at this weight) that holds the roughly 3,912-pound full charge without settling. Second, the process plan — the 16-inch lid and 2-inch outlet support real batch work, so plan centered agitation, ventilation, and spill containment. Third, freight — the tank-and-stand bundle ships LTL on a pallet; request a liftgate if you lack a dock or forklift. You are buying a turnkey two-ton batch station, not a bare tank you still have to mount and rate.
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