2500 Gallon 30 Degree Cone Bottom Tank: Complete Buyer's Guide
A 2,500-gallon cone-bottom tank engineered for complete drainage at process scale — the 30° cone funnels over fifteen tons of contents to a single 2-inch apex outlet, leaving no heel and no trapped sediment. Standing 105 inches once mounted on its required stand, this Norwesco vessel suits large-batch mixing and dosing. Its 1.5-specific-gravity wall is rated 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.
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 2500 Gallon 30 Degree Cone Bottom Tank is built around a single capability flat-bottom tanks cannot match at this volume: total recovery. The 30-degree cone drives the entire 2,500 gallons — and any solids that settle out — to the centerline outlet, so nothing is stranded above the apex when a batch ends. For blending, dosing, and processes where input must equal output, that geometry is the reason to buy a cone.
Because the cone takes the place of a flat floor, the tank cannot stand on its own; it seats in a stand that carries the load through the molded support ring, never on the vulnerable apex. Mounted, it reaches 105 inches, elevating the 2-inch outlet for gravity discharge into downstream equipment. Translucent white walls let operators watch the level and the mix, and reflect sun to limit heat in the contents.
The tank shell weighs 395 pounds empty. Charged with a 1.5-SG liquid the tank and contents reach about 31,670 pounds — over fifteen tons that the stand and its footings must carry, not the ground beneath the cone. The factory installs a 2-inch NPT outlet at the cone tip, and the 16-inch lid serves filling, agitation, and access. No inlet ships from the factory, and a compatible load-rated stand is required.
The tank is molded seamlessly with no weld or joint, UV stabilizer in the resin, and a 3-year Norwesco defect warranty. Owing to its mounted height it ships by dedicated freight, which we coordinate with you.
Technical Drawing
Official Norwesco technical drawing — 2500 Gallon 30 Degree Cone Bottom Tank
Key Features and Specifications
- 2,500-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
- 105" tall x 96" diameter — compact vertical footprint
- 395 lbs empty, approximately 31,670 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 — allow 2-3 weeks for delivery. Lift gate and residential delivery available at additional cost
Installation and Setup Guide
Installing this cone tank is an exercise in getting the stand right. The cone must never bear load on its tip, so the stand and its footings — sized for over fifteen tons through a few legs — are the safety-critical part of the whole job, not a pad beneath the tank.
Site Preparation
Build engineered footings for the stand's legs, not a slab under the tank. Each footing must be a poured pad designed for the concentrated point load of a fifteen-ton tank; a structural professional should size them for your soil. Set the stand dead-level so the cone hangs true and drains evenly to the center — a tilted stand strands product on the high side of the cone and loads the support ring unevenly.
Placement and Connections
Seat the tank fully into the stand's support ring before adding any liquid and confirm the apex hangs clear with no contact at the tip. Plumb the 2-inch apex outlet with a full-port valve so product and any solids clear without bridging, using schedule-80 PVC or stainless and a flex section before rigid pipe. Keep the discharge run short and accessible — the apex valve is the working heart of a drain-clean tank.
Venting
A cone empties fast through a large apex outlet, which can pull a hard vacuum if the vent cannot keep pace — and a vacuum will crease the wall before you notice. Size the lid vent to your maximum drain rate, and for any chemical that off-gasses use a pressure-vacuum relief vent rated for the vapor.
Maintenance and Long-Term Care
A cone tank adds the stand to your inspection list, and because the stand carries the entire load it earns first attention. A quarterly routine covers both tank and structure.
Quarterly Inspection Checklist
- Stand: Inspect legs, welds or bolts, and footings for corrosion, cracking, or movement; the stand bears the full fifteen-ton load, so its condition is non-negotiable.
- Cone and support ring: Confirm the tank seats evenly in the ring and look for stress whitening where the cone meets the support shoulder.
- Apex outlet: Verify the 2-inch valve seals and drains freely with no solids bridged above it.
- Vent: Keep the lid vent clear so a fast drain never pulls a vacuum on the wall.
Cleaning
The cone's payoff is at cleanup: open the apex valve and the tank self-drains almost entirely, leaving little to flush. Rinse from the 16-inch lid with a solution that neutralizes the previous chemical, let it drain through the cone, and repeat between incompatible products. Capture and dispose of the rinse per the product's safety data sheet.
UV and Weather Protection
The elevated tank presents a tall south wall to the sun; check that face annually for chalking. Keep a steel stand painted or galvanized against corrosion, since the structure carries the whole load and its integrity protects the tank.
Alternatives and Comparisons
The defining choice is cone versus flat bottom. If your process needs complete drainage and solids removal, only a cone delivers it at 2,500 gallons — a flat-bottom vertical of the same volume always strands a heel above its outlet. The trade is the engineered stand and elevated plumbing a vertical does not need. Within cone tanks, this 30-degree slope drains thicker product aggressively; a shallower 20-degree cone sits lower but handles free-flowing liquids better. If you want this exact tank without sourcing a stand, the matching combo ships with a fitted poly stand included. And if you only need to store rather than mix and drain, a flat-bottom 2,500-gallon vertical is the cheaper, lower, simpler option.
Frequently Asked Questions
How long will the 2500 Gallon 30 Degree Cone Bottom Tank last?
Fifteen to twenty years is realistic when the tank stays within its 1.5 specific-gravity rating, rides on a sound stand, and holds compatible chemistry. The seamless mold and in-resin UV protection make the shell durable, but a cone tank's life also depends on its stand — neglect the structure and you risk the tank long before the polyethylene wears out. Overloading, a vacuum from a clogged vent, and chemical attack are the other early-failure causes.
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 steep cone makes it especially good for products that settle or need full recovery between batches. Polyethylene resists those well but not strong oxidizers or many solvents, and never flammable fuels. Confirm your product on a poly compatibility chart and check its specific gravity before filling.
What kind of foundation does a 2500-gallon tank need?
Unlike a flat-bottom tank, this one's load goes through its stand, so the foundation supports the stand's legs — not a slab under the tank. A full load is about 31,670 pounds, so each leg footing must be a poured pad engineered for that point load, set dead-level so the cone drains true. Have a structural professional size the footings for your soil.
Does this tank come with a warranty?
Yes, three years from Norwesco against defects in materials and workmanship in the tank — molding flaws, pinholes, and factory fitting defects. It does not cover overloading past 1.5 SG, chemical attack, resting the cone on its apex, an inadequate stand or footing, or impact damage. Keep your invoice and installation photos for any claim.
Can I install this tank underground?
No. This is an above-ground, stand-mounted cone tank designed for gravity drainage above grade; its cone geometry and flat upper walls would fail under burial pressure. For below-grade storage, use a purpose-built underground cistern engineered for soil and groundwater loads.
Buying Considerations
Three things to settle before ordering this cone tank. First, the stand and footings — the tank cannot stand alone, so confirm a compatible, load-rated stand and an engineered footing plan for fifteen tons through its legs (or choose the combo with a poly stand included). Second, the elevated plumbing and access — the apex outlet and the lid at 105 inches both need planned, safe access. Third, the liquid and freight — stay at or under 1.5 specific gravity, and expect dedicated freight for this mounted tank. Call us to match the right stand and plan delivery.
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