120 Gallon Vertical Liquid Storage Tank - Natural White (28" x 54"): Complete Buyer's Guide
This 120-gallon vertical is the heavy hitter of its size class — molded from high-density linear polyethylene rated to a 1.9 specific gravity, so it carries liquids up to 15.8 pounds per gallon. That extra density rating is the whole point: it holds the concentrated acids and heavy industrial solutions a standard 1.5-rated tank cannot.
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
Most vertical tanks stop at a 1.5 specific-gravity rating. The 120 Gallon Vertical Liquid Storage Tank does not — it is built from high-density linear polyethylene (HDLPE) and rated to 1.9 specific gravity, which means it can safely hold liquids weighing up to 15.8 pounds per gallon. That single number changes what you can store: concentrated acids, heavy brines, and dense industrial solutions that would over-stress a standard tank are squarely within this tank's design envelope.
The heavier rating comes from a thicker, denser wall, and you feel it in the weight. At 28 inches in diameter and 54 inches tall the tank is compact, but the empty shell already weighs 52 pounds — noticeably more than a 1.5-rated tank of the same volume — and a full 120-gallon charge of a 1.9-specific-gravity liquid reaches about 1,954 pounds. The base it sits on must be sized for that dense load, not for the volume alone.
The fittings suit demanding chemical duty. A 1.25-inch NPT outlet is molded and leak-tested at the factory, and the 8-inch lid provides access for filling, venting, and inspection. The translucent natural-white wall lets an operator read the level and watch the contents without opening a tank that may hold something aggressive, and it reflects sunlight to moderate temperature. Norwesco's seamless one-piece mold leaves no weld seam — critical when the contents are concentrated and unforgiving.
This is heavy-duty chemical-containment equipment, built for dense and aggressive industrial liquids within its 1.9 specific-gravity rating — not for drinking water. Match every chemistry to a polyethylene compatibility chart before storing it.
Key Features and Specifications
- 120-gallon capacity — sized for heavy-duty industrial chemical containment
- Constructed from high-density linear polyethylene (HDLPE) with 1.9 specific gravity rating — handles liquids up to 15.8 lbs/gal
- 54" tall x 28" diameter — compact vertical footprint
- 52 lbs empty, approximately 1,954 lbs when full at rated specific gravity
- 1.25" NPT outlet fitting — factory installed and leak-tested
- 8" lid opening for fill, venting, and interior access
- FDA approved for potable water and food-grade liquid contact
- 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
- Place on a firm, level surface free of rocks or sharp objects that could damage the tank bottom. Ensure adequate ventilation if stored chemicals produce vapors
- Ships via LTL freight on a pallet — residential delivery with lift gate available
Installation and Setup Guide
A 1.9-rated tank is heavier per gallon than anything in the standard line, so installation begins with respecting the dense load on a small footprint.
Site Preparation
Choose a well-drained location and prepare a firm, level surface — sealed concrete is the right base for a chemical tank — flat within about 1/4 inch across the 28-inch diameter. Because a full charge approaches 1,954 pounds on a compact base, the surface must carry that concentrated dead load without settling. Clear any rock or grit that could press a point load into the bottom under that weight.
Placement and Connections
Leave roughly 12 inches of clearance around the tank for the level read, the lid, and the outlet. Plumb the 1.25-inch NPT outlet with a chemical-rated ball valve and, critically, choose every valve, gasket, and section of hose for compatibility with the concentrated chemistry you intend to store — the contents that justify a 1.9 rating are exactly the ones that attack incompatible hardware. Take the first connection in flexible chemical-rated hose so the poly wall can move with temperature without cracking the outlet boss.
Venting and Safety
Fit a vent appropriate to the chemistry. Concentrated acids and heavy industrial solutions often produce vapors that demand a pressure/vacuum relief vent rated for the specific product rather than a plain screen. Integrate the tank into secondary containment, and keep eyewash and the appropriate spill response within reach — the chemistries this tank is built for warrant it.
Maintenance and Long-Term Care
With aggressive, dense contents, maintenance leans hard on watching the wall for chemical effect and keeping every wetted part compatible and tight.
Quarterly Inspection Checklist
- Wall condition: The translucent wall is your window — inspect the inside face for clouding, crazing, blistering, or swelling, the warning signs that a concentrated chemistry is working on the poly. On a 1.9-duty tank these checks matter more, because the contents are by definition harder on the material.
- Outlet and hardware: Examine the 1.25-inch NPT fitting, valve, and hose for chemical staining, softening, or weeping. Replace any wetted part showing attack immediately; hand-snug threads without a pipe wrench.
- Base and load: Confirm the tank still sits dead level on its base; a dense full charge punishes any settled corner.
- Vent: Verify the relief vent is clear and functioning — a blocked vent on a tank of concentrated chemistry is both a deformation and a safety risk.
Decontamination Between Chemistries
Decontaminate the tank, outlet, and hose to the chemical manufacturer's procedure before any product change. Residue from one concentrated chemical reacting with the next is a real hazard at this duty level, not a cosmetic concern. This tank is dedicated chemical equipment and is never converted to potable use.
UV and Long-Term Care
The HDLPE carries UV stabilizers, but check the sun-facing side annually for chalking if the tank lives outdoors, and shade it where UV is intense. The dense wall is durable, but its long-term enemy is the chemistry inside — a documented log of wall condition and hardware replacement is the best tool for keeping a heavy-duty tank in safe service.
Alternatives and Comparisons
The 120 Gallon Vertical Liquid Storage Tank is defined by its 1.9 specific-gravity rating, and that is exactly where the comparison should focus.
1.9 vs. 1.5 specific gravity: A standard 1.5-rated tank handles liquids up to 12.5 pounds per gallon and costs less, because its wall is thinner and lighter. This 1.9-rated tank carries up to 15.8 pounds per gallon — the difference between storing dilute solutions and storing concentrated acids, heavy brines, and dense industrial chemistries. If your liquid is dense or aggressive, the higher rating is not optional; if it is light and benign, a 1.5 tank is the economical choice.
Vertical vs. other shapes: This vertical uses minimal floor space and drains under its own head. For the same heavy-duty chemistry, a cone-bottom tank would add complete-drain capability at the cost of a stand, and a horizontal tank would lower the center of gravity for transport. For fixed, space-efficient storage of dense chemistry, the vertical is the right form.
Other 120-Gallon Options
Frequently Asked Questions
How long will the 120 Gallon Vertical Liquid Storage Tank - Natural White (28" x 54") last?
With compatible chemistries on a level base and reasonable UV protection, this HDLPE shell readily reaches 15-plus years. Because the tank exists to hold dense and aggressive liquids, the chemistry — not age — is the main life-limiting factor: a concentrated product can craze or blister the wall over time. Stay within the 1.9 specific-gravity rating, verify compatibility, inspect the wall regularly, and shade the tank in high-UV areas to reach the long end of its service life.
What chemicals can I store in this tank?
This is heavy-duty chemical-containment equipment rated to 1.9 specific gravity, built to hold dense and aggressive industrial liquids up to 15.8 pounds per gallon — concentrated acids, heavy brines, and dense process and cleaning chemistries within that rating. It is not for drinking water and never for fuels, solvents, or flammables. The high-duty rating exists for exactly the chemistries that attack incompatible materials, so always confirm a product against a polyethylene compatibility chart first.
What kind of foundation does a 120-gallon tank need?
A surface engineered for the dense load. A full 120-gallon charge of a 1.9-specific-gravity liquid is roughly 1,954 pounds on a compact 28-inch base — heavier than a standard tank of the same volume. A firm, level concrete pad able to carry that concentrated dead load without settling is the right foundation. The surface must be flat under the full footprint, since an uneven base loads the thick wall unevenly.
Does this tank come with a warranty?
Yes — Norwesco backs the tank with a manufacturer warranty against defects in materials and workmanship when used within its ratings, covering molding faults such as voids and pinholes. It does not cover chemical attack from an incompatible product, damage from exceeding the 1.9 specific-gravity rating, improper installation, or impact. Keep your invoice and a photo of the installed tank, and document the chemistry stored, for any claim.
Can I install this tank underground?
No. This is an above-ground vertical tank; even with its thick HDLPE wall it is not engineered to resist the inward pressure of surrounding soil, and burial would risk collapse and void the warranty. For below-grade storage of dense or aggressive chemistry, use a purpose-built underground tank designed with ribbed, reinforced walls for those loads.
Buying Considerations
Three checks before ordering the 120 Gallon Vertical Liquid Storage Tank. First, the specific gravity — the reason to buy this tank is its 1.9 rating, so confirm your liquid's density needs it; if your chemistry is light, a 1.5-rated tank costs less. Second, the base and hardware — the dense full charge approaches 1,954 pounds on a small footprint, so provide a level concrete base and select valves, gaskets, and hose compatible with your concentrated chemistry. Third, freight — at 52 pounds empty it ships LTL on a pallet; request a liftgate if you lack a dock or forklift. This is dedicated heavy-duty chemical equipment, never a potable-water tank.
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