8400 Gallon Vertical Liquid Storage Tank - Natural White (119" x 188"): Complete Buyer's Guide
8,400-gallon white liquid storage tank built for agricultural chemical and fertilizer storage. Manufactured by Norwesco from virgin linear polyethylene (HDPE) rated to handle liquids up to 12.5 pounds per gallon. FDA approved for contact with potable water, ensuring safe storage for drinking water and food-grade liquids.
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 8400 Gallon Vertical Liquid Storage Tank is bulk industrial chemical storage at full scale — the vessel a fertilizer dealer, chemical processor, or large agricultural operation installs to hold a tanker-load of liquid in one place. Standing nearly sixteen feet tall on a ten-foot base, it is among the largest single poly tanks made, banking 8400 gallons of chemical or fertilizer in one seamless wall.
Norwesco molds it in a single rotational pass from virgin linear polyethylene, so even at this enormous size the wall is one continuous piece with no seam or weld to fail under chemical service. The 1.5 specific gravity rating engineers it for the dense liquids common in industry — chemicals, liquid fertilizers, and concentrated solutions up to 12.5 pounds per gallon — with the wall thickness graded for that load. The translucent white wall lets operators read the level from the ground without climbing or opening the tank.
Empty, this tank already weighs 1,717 pounds; filled with a 1.5-SG liquid it loads the foundation with roughly 106,801 pounds — over fifty tons — which puts foundation design firmly in professional-engineering territory. Discharge runs through a factory 2-inch NPT outlet, with a 16-inch lid for top access. No inlet is fitted, so you drill and add a bulkhead at the height your plumbing requires.
Key Features and Specifications
- 8,400-gallon capacity — sized for agricultural chemical and fertilizer storage
- Constructed from virgin linear polyethylene (HDPE) with 1.5 specific gravity rating — handles liquids up to 12.5 lbs/gal
- 188" tall x 119" diameter — compact vertical footprint
- 1717 lbs empty, approximately 106,801 lbs when full at rated specific gravity
- 3" with 2" Reducer and 3" Siphon tube 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
- Large tanks require professional installation. Ensure the pad is level within 1 inch across the full diameter and that all piping connections allow for thermal expansion
- Ships via dedicated freight carrier due to oversized dimensions — contact us for delivery timeline and site access requirements
Installation and Setup Guide
Installing an 8400-gallon tank is a civil project, not a placement: at 188 inches tall on a 119-inch base it is a towering vertical column, and a full 1.5-SG load drives roughly 106,801 pounds — over fifty tons — down through that footprint. Its height makes wind and verticality real engineering concerns, and its mass makes the foundation the single most critical element of the entire install.
Site Preparation
This demands a professionally engineered reinforced concrete foundation, designed by a structural engineer for the full 106,801-pound load, the tank's height-driven overturning moment, and your specific soil. The slab must extend beyond the 119-inch base and sit flat to a quarter inch; at this scale, any deviation concentrates tons of load and any softness in the subgrade invites the kind of differential settlement that can take a tall column out of plumb dangerously.
Placement and Connections
Take the discharge off the factory 2-inch outlet at the base of a nearly sixteen-foot liquid column — the head pressure here is the highest of any tank in this batch by a wide margin — and isolate it with a flexible coupling rated for the chemical so the tank's movement and creep never load the bulkhead. Since no inlet is fitted, drill and install a chemically compatible bulkhead at your chosen fill height. Hand-tighten all poly threads a quarter turn past snug.
Venting
Drawing down 8400 gallons pulls an enormous volume of air back in, and for chemical service the vent is doubly important. Keep the 16-inch lid's relief path open, and for any volatile, fuming, or reactive chemistry fit a pressure/vacuum relief vent rated specifically to the stored chemical rather than a plain screen. On a column this tall and this full, a blocked vent can buckle a wall catastrophically during a hard draw-down.
Maintenance and Long-Term Care
An 8400-gallon chemical tank is major infrastructure, and its maintenance is governed by chemical service and structural load, not by anything resembling potable-water care. The translucent wall makes level and condition monitoring easy from the ground, and the routine below protects the vessel, the costly foundation, and the people working around fifty tons of stored liquid.
Quarterly Inspection Checklist
- Wall and seam-line read: Use the translucent wall to scan the full height for bulging, stress whitening, or discoloration; on a 106,801-pound column these are the earliest structural warnings.
- Outlet and bulkhead check: Inspect the 2-inch outlet and your installed inlet bulkhead — the highest-head fittings in the batch — for chemical weeping, and confirm they remain compatible with the stored liquid.
- Foundation audit: Examine the slab and perimeter for cracking, settling, or tilt; with a tall fifty-ton column, foundation movement is the dominant and most dangerous failure mode.
- Vent verification: Confirm the pressure/vacuum relief or vent is clear and correctly rated for the current chemical, since vent failure on a tank this size is among the most violent ways it can fail.
Cleaning
Cleaning is decontamination, dictated by the chemical stored: follow the chemical manufacturer's procedures before switching products, and never assume a rinse suffices when changing chemistries in a vessel this large. The 2-inch outlet drains the bulk, but a tank of this height requires planned, safe entry or remote cleaning per confined-space and chemical-handling protocols. This is a chemical-storage tank and must not be repurposed for potable water without full, documented decontamination and verification.
UV and Weather Protection
The translucent white wall reflects sunlight to keep contents cooler and carries UV stabilizer compounded into the resin, but on a vessel this tall and exposed, inspect the sun-facing height annually for chalking. Outdoor industrial tanks of this scale benefit from the white pigment's reflectivity, which moderates the thermal cycling that otherwise stresses a large chemical tank through hot days and cold nights.
Alternatives and Comparisons
At 8400 gallons this is the largest single vertical tank in the batch, committing you to an engineered foundation for over fifty tons. If your storage need is smaller, the 6500-, 2500-, and 2000-gallon vertical liquid tanks step the load and the foundation down substantially; for greater total capacity, dealers typically manifold several large tanks together rather than going even bigger in one vessel. Compare loaded weights — this one is in a class of its own.
Vertical vs. Horizontal: Vertical tanks use less floor space for the same capacity but require more overhead clearance. If you have height restrictions, consider a horizontal or low-profile tank. Vertical tanks also drain more completely due to gravity — the liquid column above the outlet creates positive pressure all the way to the last few gallons.
Other 8400-Gallon Options
Frequently Asked Questions
How long will the 8400 Gallon Vertical Liquid Storage Tank - Natural White (119" x 188") last?
On a properly engineered foundation, within its 1.5 SG and 120°F limits, and serviced for the chemicals it holds, this 8400-gallon tank reaches well over fifteen years. The seamless wall has no weld to fail even at this scale; what ends a tank of this size early is foundation settlement, an incompatible or overweight chemical, or vent failure — not the polyethylene itself.
What chemicals can I store in this tank?
Rated to 1.5 specific gravity, it stores the dense industrial chemicals and liquid fertilizers common at this scale, up to 12.5 pounds per gallon, but each chemical must be verified against a polyethylene compatibility chart first. Exclude fuels, solvents, and flammables entirely. While the resin is food-grade capable, treat this as a dedicated chemical-storage vessel, not a drinking-water tank.
What kind of foundation does a 8400-gallon tank need?
With a load of roughly 106,801 pounds and a tall, wind-exposed profile, this strictly requires a reinforced concrete foundation engineered by a structural professional for the full weight, the overturning moment, and your soil. There is no informal version of this foundation — at over fifty tons, it must be designed and built to specification.
Does this tank come with a warranty?
Yes — Norwesco's 3-year warranty covers manufacturing defects under normal use, meaning factory faults rather than overloading past 1.5 SG, foundation failure, chemical attack, or impact. On an asset of this value, keep your receipt and thorough installation and foundation documentation.
Can I install this tank underground?
No. Even at 8400 gallons this is an above-ground tank, and its flat wall cannot withstand soil pressure; burying it would collapse the vessel and void the warranty. For below-grade storage, use purpose-built ribbed underground tanks engineered for burial loads.
Buying Considerations
Three non-negotiables before ordering this tank: retain a structural engineer to design the foundation for the full 106,801-pound load and the height-driven overturning forces, confirm both the footprint and the substantial overhead clearance a sixteen-foot tank requires, and arrange specialized freight with a crane and clear site access, since a 1,717-pound empty tank this large cannot be handled by ordinary equipment.
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