300 Gallon Vertical Liquid Storage Tank - Natural White (35" x 79") #41528: Complete Buyer's Guide
300-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 300 Gallon Vertical Liquid Storage Tank, part number 41528, is a compact chemical and fertilizer tank that stacks 300 gallons into a 79-inch column on a 35-inch base. The tall profile suits chemical pads and tank rows where vertical space is available and floor area is limited, giving a useful working supply without sprawling across the ground.
Built in one rotational molding from virgin linear polyethylene and rated to 1.5 specific gravity, it carries dense farm and industrial liquids up to 12.5 pounds per gallon. Operators read the level from the ground through the translucent white wall, which also reflects sunlight to keep the chemical cooler.
Empty, the tank weighs 85 pounds; filled with a 1.5-SG liquid it puts roughly 3,838 pounds onto its 6.7-square-foot footprint, which makes a flat, firm base important. A factory 2-inch NPT outlet handles discharge and a generous 16-inch lid provides top access. The tank comes without an inlet, so install a bulkhead where your plumbing requires.
Key Features and Specifications
- 300-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
- 79" tall x 35" diameter — compact vertical footprint
- 85 lbs empty, approximately 3,838 lbs when full at rated specific gravity
- 2" fitting with 2" siphon 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
- 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
Tank 41528 holds 300 gallons in a 79-inch column on a 35-inch base, a moderately tall, fairly slim profile that puts a full 1.5-SG load of about 3,838 pounds through under seven square feet. The height makes a level base and verticality the leading concerns, while the 35-inch base gives a bit more stability than the narrowest columns — enough to ease, though not eliminate, the tipping worry.
Site Preparation
Set it on a level four-inch concrete pad or a well-compacted stone bed sized past the 35-inch base, leveled to a quarter inch. A column nearly seven feet tall that stands off-plumb walks its load toward one edge of the lower wall, where the chemical head is highest, and fatigue concentrates there. If the tank lives where it could be struck, restrain the upper body to a wall or frame.
Placement and Connections
Run the discharge off the factory 2-inch outlet and break it with a chemically compatible flexible coupling so the column's movement never loads the bulkhead. Because there is no factory inlet, add a compatible bulkhead at whatever fill height suits your layout. Use chemical-rated plumbing, keep the line short and downhill, and hand-tighten the poly threads a quarter turn past snug.
Venting
A 300-gallon chemical column breathes meaningfully as it cycles, and the wide 16-inch lid makes the relief path easy to manage. Keep the vent open, and for volatile chemistries fit a pressure/vacuum relief vent rated to the chemical. On a tall tank a blocked vent pulls a vacuum that can dimple the upper wall during a hard draw-down, so confirm the vent and its rating first.
Maintenance and Long-Term Care
A 300-gallon chemical column is serviced for chemical duty, not potable use, and the translucent wall makes monitoring a quick visual from the ground. The routine below addresses what a moderately tall chemical tank needs: a level base, compatible fittings, and a correctly rated vent.
Quarterly Inspection Checklist
- Column read: Use the translucent wall to sight the 79-inch height for bulging, stress whitening, or any lean signaling base settlement.
- Outlet and bulkhead check: Check the 2-inch outlet and the inlet bulkhead you installed for chemical leakage, and reconfirm compatibility with the liquid.
- Base level: Confirm the 6.7-square-foot pad is level and has not settled on one side after weather.
- Vent verification: Make sure the 16-inch lid's vent or pressure/vacuum relief is clear and rated for the chemistry in use.
Cleaning
Whenever you change products, decontaminate per the chemical maker's guidance — a plain rinse will not remove residue when switching chemistries. The 2-inch outlet drains the column, and the wide 16-inch lid gives good access for inspection under chemical-handling precautions. Reserve this tank for chemical storage; it must not hold potable water.
UV and Weather Protection
Reflecting sun to cool the contents and UV-stabilized in the resin, the translucent white wall asks only a yearly check of its sun-facing height for chalking. The reflectivity moderates the thermal cycling a slimmer wall undergoes through the day, which is easier on the tank long term.
Alternatives and Comparisons
This 35-by-79 column (tank 41528) holds 300 gallons of chemical in a compact footprint, where the wider 46-by-50 version trades that for a more stable stance. Drop to the 250- or 200-gallon verticals for a smaller volume, or move up to the 850-gallon and larger tanks for more. Choose by the footprint your pad allows.
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 300-Gallon Options
Frequently Asked Questions
How long will the 300 Gallon Vertical Liquid Storage Tank - Natural White (35" x 79") #41528 last?
On a flat base, within its 1.5 SG rating, and serviced for the chemicals it holds, this 300-gallon column (41528) runs well past fifteen years. The seamless wall has no weld to part; a leaning base or an incompatible chemical is what ends a tall tank early, not the polyethylene.
What chemicals can I store in this tank?
Its 1.5 specific gravity rating covers agricultural chemicals, liquid fertilizers, and most industrial solutions up to 12.5 pounds per gallon — confirm each one against a polyethylene compatibility chart first. Exclude fuels, solvents, and flammables entirely, and reserve it for chemical service rather than drinking water.
What kind of foundation does a 300-gallon tank need?
For a 300-gallon column loading roughly 3,838 pounds through a 35-inch base, use a flat, firm four-inch concrete pad or a well-compacted stone bed, level to a quarter inch. The height makes flatness a safety matter, since an uneven base lets a tall tank lean.
Does this tank come with a warranty?
Yes — under normal use the Norwesco 3-year warranty addresses manufacturing defects, meaning factory faults rather than overloading beyond 1.5 SG, a leaning or poorly set tank, chemical attack, or impact. Save your receipt along with an install photo.
Can I install this tank underground?
No. Strictly above-ground, the tank has a flat wall that soil pressure would crush if buried, voiding the warranty in the process. Below grade, the right choice is a ribbed underground tank made to resist backfill.
Buying Considerations
Confirm a 79-inch tank clears your overhead, that the base can be brought flat to a quarter inch since the height makes leveling matter, and that you can restrain the upper body where it might be struck. Confirm the chemical is polyethylene-compatible before committing the tank to it.
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