A slim 300-gallon upright on a 35-inch base, the Norwesco 40213 is the tank for a workbench-side chemical supply, a small dosing skid, or any spot where 300 gallons must fit a footprint under seven square feet. Its 1.5-specific-gravity wall is rated for chemicals up to 12.5 pounds per gallon, and it weighs just 79 pounds empty.

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.

Manufacturer	Norwesco
Manufacturer Part #	N-40213
Nominal Capacity	300 Gallons
Footprint (Diameter)	35"
Overall Height	79"
Empty Weight	79 lb
Material	Polyethylene (HDPE)
Color	White
Rated Specific Gravity	1.5
Certifications	IAPMO certified, CSA certified, FDA-compliant resin
Warranty	3-year limited (full replacement)
Shipping	Ships LTL motor freight

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 is the small, tall format for tight chemical work. At 79 inches high on a narrow 35-inch base, it stands like a slender drum and occupies barely 6.7 square feet — easy to stand beside a dosing pump, in a containment tray, or against a wall in a compact treatment room. One person can usually reposition the 79-pound empty shell.

The narrow profile is built for crowded spaces. Three hundred gallons over so little floor lets the tank go where nothing wider fits, and the 79-inch height gives the outlet enough head to feed a metering pump steadily. Translucent white walls show the chemical line through the shell, and the white pigment reflects sun if the tank lives outdoors.

Filled with a 1.5-SG liquid the tank reaches about 3,832 pounds — a little under two tons over the small base, which still presses firmly on the surface beneath. A 2-inch NPT outlet is installed at the bottom, and the 16-inch lid handles filling and access. No inlet ships from the factory; fill through the lid or add a bulkhead where your plumbing prefers.

One-piece molding leaves no seam to leak, the UV stabilizer is in the resin, and Norwesco's 3-year defect warranty applies. Each tank is inspected before it ships.

Technical Drawing

Official Norwesco technical drawing — 300 Gallon Vertical Liquid Storage Tank - Natural White (35" x 79") #40213

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
79 lbs empty, approximately 3,832 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
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

The 300 is light and easy to handle, but its tall, slim shape means a flat base and a touch of restraint matter more than its modest weight implies. Two tons on a small footprint is still a real point load.

Site Preparation

Stand it on a firm, flat surface that fully supports the 35-inch base — a slab, a sturdy containment tray, or a level pad. Keep it flat within a quarter inch; on a tank twice as tall as it is wide, a slight tilt grows into a noticeable lean as it fills. Clear away any grit or sharp object under the bottom. Outdoors and empty, a simple tie-down keeps the light column from being walked by wind.

Placement and Connections

Point the 2-inch outlet at your pump and keep the plumbing short. Thread schedule-80 PVC or stainless into the bulkhead, hand-tighten and finish with a strap wrench, and add a flex coupling before rigid pipe to absorb thermal movement. A foot or so of clearance is enough to sample and inspect at this size.

Venting

Even a small tank collapses if a pump out-draws the vent. Make sure the lid vent admits air as fast as the pump pulls liquid, and on chemical service fit a pressure-vacuum relief vent matched to the product.

Maintenance and Long-Term Care

This is a nearly maintenance-free tank; a brief quarterly check keeps it sound for years.

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Quarterly Inspection Checklist

Shell: Look down the column for any bulge or a flat spot at the base signaling an overloaded wall or settled support.
Outlet: Feel the 2-inch fitting for weeping and snug it by hand.
Base: Confirm the surface is still level under the narrow footprint.
Vent: Keep the lid vent screen clear so the slim wall never starves for air.

Cleaning

Empty via the 2-inch outlet, then flush the interior with a neutralizing solution before changing chemicals. Clean from above through the 16-inch lid with a wand. Collect and dispose of the rinsate in line with the product's safety data sheet.

UV and Weather Protection

The in-resin UV package carries this tank through years outdoors; check the south wall once a year for chalking. Indoors, UV is a non-issue — one of the reasons this small format often lives in a treatment room.

Alternatives and Comparisons

The 300-gallon size suits small, precise jobs. This slim, tall tank saves floor and builds outlet head for metering. A shorter 305 with a wider base sits lower and is steadier where floor space allows. If you need a clean, complete drain for batching small volumes, a small cone-bottom tank does that better than this flat bottom. And for storing water, a water-grade tank costs less by skipping the 1.5-SG wall built into this chemical version.

Frequently Asked Questions

How long will the 300 Gallon Vertical Liquid Storage Tank - Natural White (35" x 79") #40213 last?

Plan on fifteen to twenty years provided the tank stays inside its 1.5 specific-gravity rating, sits on a level base, and holds compatible chemistry. With no seams and UV protection in the resin, the shell is durable; the usual early-failure causes are an overloaded wall, a vent that clogged and pulled a vacuum, or chemical attack on incompatible plastic.

What chemicals can I store in this tank?

At 1.5 SG it handles most liquid fertilizers, treatment chemicals, and many acids and bases up to 12.5 pounds per gallon. Polyethylene resists those, though not strong oxidizers, many solvents, or any flammable fuel. Look up your chemical on a polyethylene compatibility chart and verify its specific gravity before filling.

What kind of foundation does a 300-gallon tank need?

A full load is about 3,832 pounds over the small 35-inch base. A firm, level slab, tray, or compacted pad that fully supports the diameter is sufficient. Because the tank is tall and narrow, keep the surface flat within a quarter inch and clear of any grit under the bottom.

Does this tank come with a warranty?

Yes, three years from Norwesco against defects in materials and workmanship: pinholes, fitting faults, and molding defects from the factory. Excluded are overloading beyond 1.5 SG, chemical attack, a faulty base, and impact damage. Keep proof of purchase and photos of the completed install on hand for warranty purposes.

Can I install this tank underground?

No. Built for above-ground use, its flat-walled shell cannot take soil pressure and would collapse if buried, voiding coverage. For below-grade storage choose a ribbed, reinforced underground cistern built for soil loads.

Buying Considerations

Three quick checks before ordering. First, the footprint — this slim tank is made for tight spaces, so confirm 79 inches of height and access to the lid. Second, the product — hold it at or below 1.5 specific gravity and confirm its weight. Third, freight — at this size it ships easily on a pallet with a lift gate. Call us to arrange delivery.