11000 Gallon Vertical Liquid Storage Tank: Complete Buyer's Guide
11,000-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 11,000 Gallon Vertical Liquid Storage Tank is a well-balanced large bulk vessel, built on a broad 144-inch base that gives it a steadier stance than the height-maximized tanks of similar volume. At 167 inches tall it stores eleven thousand gallons of agricultural or industrial chemical without towering, making it a practical, serviceable choice for fertilizer plants and treatment facilities that have the ground to support a wider footprint.
Norwesco rotationally molds it in one seamless piece of virgin linear polyethylene rated to 1.5 specific gravity, handling agricultural and industrial liquids to 12.5 pounds per gallon. The translucent natural-white wall shows the level from ground level and bounces sunlight to keep contents cooler, backed by compounded UV inhibitors and a 120 F / 48 C ceiling.
It weighs 2,030 pounds empty and reaches roughly 139,640 pounds full at 1.5 SG — nearly seventy tons on the broad base. The outlet is a 3-inch fitting with a 2-inch reducer and a 3-inch siphon tube, plumbing large for bulk transfer or stepping down to existing lines, and the 22-inch lid gives interior access. Norwesco stands behind the tank with a 3-year manufacturing-defect warranty.
Technical Drawing
Official Norwesco technical drawing — 11000 Gallon Vertical Liquid Storage Tank
Key Features and Specifications
- 11,000-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
- 167" tall x 144" diameter — compact vertical footprint
- 2030 lbs empty, approximately 139,640 lbs when full at rated specific gravity
- 3" with 2" Reducer and 3" Siphon tube NPT outlet fitting — factory installed and leak-tested
- 22" 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
The balanced proportions of this 11,000-gallon tank — substantial volume on a wide 144-inch base — make for a comparatively stable installation, though seventy tons of chemical still requires a fully engineered containment foundation.
Engineered Containment Foundation
Commission a reinforced concrete slab designed for about 139,640 pounds over the broad 144-inch footprint, flat across the full diameter and built as secondary containment for your chemistry. The wide base distributes the load and slightly relaxes the leveling tolerance versus a tall tank, but the slab must still be true, properly reinforced, and fully cured before filling. Grade the site so any spill is directed into containment.
Plumbing
Plumb the 3-inch outlet in schedule 80 PVC or stainless rated for your product, using the supplied reducer to tie into 2-inch lines and the siphon to draw the tank down completely. Keep the first foot flexible for thermal movement, support the run independently, and select connection hardware your chemical will not attack.
Venting
Fit a large pressure/vacuum relief vent in the 22-inch lid, rated for your chemical and sized to your bulk transfer rates. Eleven thousand gallons moves substantial air during fills and draws, so an adequately sized vent is essential to prevent the wall from pulling a vacuum on a fast pump-down.
Maintenance and Long-Term Care
A balanced 11,000-gallon chemical tank is maintained for containment integrity and compatibility, with structural checks scaled to its seventy-ton full weight.
Inspection
- Containment slab: Inspect the foundation and curbing for cracks, settlement, and containment breaches on a regular cycle; the wide base helps, but seventy tons still finds a weak spot.
- Wall: Read the lower wall, where pressure peaks, for bulging or stress whitening, and watch for swelling that signals a borderline-compatible chemical attacking the resin.
- Outlet and vent: Examine the 3-inch fitting, reducer, and siphon for weeping or chemical etching, and make sure the relief vent stays clear and rated for the product on hand.
Product Changes
Take the tank offline, drain through the siphon, clean the interior via the 22-inch lid under confined-space procedures, decontaminate per the incoming chemical's specification, and verify the new product on a polyethylene compatibility chart before refilling. There is no drinking-water duty, so cleaning serves only compatibility and carryover control.
UV and Heat
The compounded UV inhibitors carry the wall through years of exposure; check the sun-facing side once a year where UV is intense. The reflective white surface helps hold down internal temperature and vapor pressure on a large tank during summer.
Alternatives and Comparisons
At 11,000 gallons on a wide 144-inch base, this tank sits between the height-maximized and the smaller large tanks, and the comparison is about balance.
Balanced 11,000 vs. the tall 12,000: This tank trades a little capacity for a wider, steadier base and easier serviceability than the tall 12,000-gallon tank that maximizes volume on a smaller footprint. If your site has the ground and you value stability and access, the balanced tank is the more practical fixture; if pad area is scarce, the taller tank packs more gallons into less space. Against a pair of 5,000- to 6,500-gallon tanks, this single vessel offers lower cost per gallon and simpler plumbing, at the expense of redundancy.
Other 11000-Gallon Options
Frequently Asked Questions
How long will the 11000 Gallon Vertical Liquid Storage Tank last?
On an engineered containment slab and used within its 1.5 SG and 120 F ratings, the tank readily gives 15 to 20 years of bulk chemical service. The balanced proportions reduce wall stress, the compounded UV package handles the sun, and the seamless shell has no weld to fail. Incompatible chemistry, over-density, or a settling foundation are what shorten that life.
What chemicals can I store in this tank?
Rated at 1.5 specific gravity, the tank takes most liquid fertilizers, crop-protection chemicals, and industrial solutions up to 12.5 pounds per gallon. Verify each chemical on a polyethylene compatibility chart prior to filling, because the resin tolerates many acids and bases but is vulnerable to some solvents and oxidizers. It is not for fuels or flammables, and it serves as a chemical tank rather than a drinking-water vessel.
What kind of foundation does a 11000-gallon tank need?
A full 11,000-gallon tank weighs about 139,640 pounds at 1.5 SG — nearly seventy tons on the broad 144-inch base. It requires a reinforced concrete slab engineered for that load, level across the full diameter and serving as secondary containment. The wide base eases the leveling tolerance somewhat, but this remains an engineered-foundation project.
Does this tank come with a warranty?
Yes. Under normal use, Norwesco's 3-year warranty handles molded-in manufacturing faults, not damage from incompatible chemicals, over-density, a poor foundation, or impact. Retain documentation and photographs of the engineered containment setup.
Can I install this tank underground?
No. A tank of this size is built for above-ground duty and cannot take soil pressure; burying it would crush the tank and void coverage. For below-grade storage, use purpose-engineered reinforced structures rather than an above-ground poly tank.
Buying Considerations
Three commitments accompany this 11,000-gallon tank. First, the engineered containment foundation: a reinforced slab sized for seventy tons, curbed for containment, and cured before delivery. Second, delivery access: the oversized shell needs a clear route for a flatbed and a crane to stand it. Third, the chemical, checked for polyethylene compatibility at the 1.5 SG rating on a chart. The wide, balanced base is the selling point where stability and easy service matter. Listed at $15,888.00 before freight, on a dedicated carrier to your ZIP.
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