750 Gallon 20 Degree Cone Bottom Tank with Poly Stand: Complete Buyer's Guide
A 750-gallon 20-degree cone-bottom tank from Norwesco shipped complete with its poly stand — a turnkey self-draining vessel 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 750-gallon 20-degree cone-bottom tank ships complete with its poly stand, which makes it a turnkey self-draining vessel for mixing and batch work — no separate stand to source or match. The 20-degree cone is the gentler self-draining angle: shallow enough to keep the overall height down (67 inches tall, including the stand-borne cone, on a 73-inch diameter), yet steep enough to drain thin-to-medium liquids completely to the center outlet. The combined shell-and-stand weighs 319 pounds.
The tank is rotomolded in one seamless piece of virgin linear polyethylene rated to 1.5 specific gravity, carrying dense liquids up to 12.5 pounds per gallon. Translucent white walls show the level through the side and reflect sun to keep contents cooler, and the resin is FDA-compliant for food-grade liquids.
The included poly stand carries the full load — about 9,702 pounds at the rated gravity — through its legs and the tank's flange, never on the cone apex. The cone-tip 2-inch outlet ships factory-installed and leak-tested for clean center discharge, and a 16-inch lid provides top access. Norwesco's 3-year warranty applies.
Technical Drawing
Official Norwesco technical drawing — 750 Gallon 20 Degree Cone Bottom Tank with Poly Stand
Key Features and Specifications
- 750-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
- 67" tall x 73" diameter — compact vertical footprint
- 319 lbs empty, approximately 9,702 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
Because the matching poly stand comes in the box, installation is simpler than sourcing a stand separately — but the principle is unchanged: the stand carries the tank, the cone apex never does, and both sit on a sound pad.
Site Preparation and the Stand
Assemble the included poly stand per its instructions and set it on a four-inch compacted gravel pad or a concrete slab, finished flat so all the legs share the load evenly. The poly stand is engineered for this tank's full 9,702-pound load; do not substitute an undersized stand or rest the cone directly on the ground. Add a sealed surface or berm if the chemistry warrants containment.
Placement and Connections
The stand lifts the cone outlet off the ground, leaving room for a valve and a drain line beneath. Plumb the 2-inch center outlet down into a full-port valve with a short, chemical-rated flexible connection so the cone's complete-drain advantage carries through to the discharge. Match the valve and seals to the chemistry.
Venting
Vent through the lid so the tank breathes on fill and drain, and fit a chemistry-rated relief vent if the contents off-gas.
Maintenance and Long-Term Care
With the stand included, keep it on the inspection list from day one — its legs and joints carry the entire tank.
Quarterly Inspection Checklist
- Poly stand: check the legs and joints for cracks, loosening, or uneven settling, and confirm all legs still share the load. A compromised stand puts the cone at risk.
- Cone and shell: inspect the 20-degree cone and lower wall for stress whitening or bulging at the transition.
- Outlet and seals: confirm the center valve operates freely and inspect its gaskets for chemical attack; poly threads get hand-tightening only.
- Vent: verify the lid vent is clear.
Cleaning and Chemical Changeover
The cone drains complete, so changeovers rinse clean without a residual heel. Follow the chemical manufacturer's decontamination protocol, capture and dispose of the rinsate per label and regulation, and check the next chemical against the polyethylene and seals before refilling.
UV and Weather Protection
Because the white wall passes some light, shade algae-prone or light-sensitive contents under strong sun and look the wall over each year.
Alternatives and Comparisons
This 750 comes stand-included with a 20-degree cone — the gentler angle that keeps height down while still draining thin-to-medium liquids. The same 750-gallon tank is available without a stand if you already have suitable support, and in steeper 45-degree form for heavier sludges (taller, and worth it only if your solids need it). If you do not need complete drainage at all, the flat-bottom 750-gallon vertical stores the same volume without a stand.
Other 750-Gallon Options
Frequently Asked Questions
How long will the 750 Gallon 20 Degree Cone Bottom Tank with Poly Stand last?
With compatible chemistry, the included stand maintained and set level, and use within its 1.5 SG and 120 F limits, expect 15 to 20 years. Keeping the poly stand sound is as important as the shell — together they reach the long end of that range.
What chemicals can I store in this tank?
At a 1.5 specific gravity rating it manages ag chemicals, fertilizers, and industrial solutions in that density, in FDA-compliant food-grade resin. Not for fuels, solvents, or flammables. Check both your chemical and your seal materials against a compatibility chart before the first fill.
What kind of foundation does a 750-gallon tank need?
The included poly stand carries the tank's full 9,702-pound load through its legs and flange — never the cone apex — so the foundation's job is to support that stand. Assemble the stand per instructions and set it on a four-inch compacted gravel pad or a concrete slab, finished flat so all legs share the load. Do not rest the cone directly on the ground.
Does this tank come with a warranty?
The tank carries a three-year Norwesco warranty against defects in materials and workmanship from the factory. Excluded are overloading, an undersized or damaged stand, chemical attack, and impact. Keep records for any claim.
Can I install this tank underground?
No. A cone-bottom tank is a stand-mounted, above-ground vessel and cannot be buried. Below-grade storage calls for tankage purpose-built for burial.
Buying Considerations
Because the stand is included, the main checks are simpler: a flat pad for the assembled stand, a chemical at or under 1.5 SG compatible with the polyethylene and seals, and a freight plan — this tank-and-stand ships LTL by flatbed and needs a forklift to unload. Confirm your site access and we will arrange the delivery.
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