This 1,550-gallon Norwesco tank packs its volume into a low, broad 67-by-87-inch body — wider than it is tall — for sites where stability and ground-level access beat a compact footprint. The 1.5-specific-gravity wall is rated for fertilizers and ag chemicals up to 12.5 pounds per gallon, and the factory 2-inch siphon outlet draws it nearly 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-40235
Nominal Capacity	1550 Gallons
Footprint (Diameter)	87"
Overall Height	67"
Empty Weight	219 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 1550 Gallon Vertical Liquid Storage Tank in this configuration is built low on purpose. At 67 inches tall on an 87-inch base, it carries fifteen-hundred-plus gallons close to the ground, so an operator looks down into the 16-inch lid from a low step and the loaded mass stays planted in wind or on rough field ground.

The wide stance is the defining trait. An 87-inch base under a 67-inch body spreads the load over 41.3 square feet and gives the tank a low center of gravity that resists tipping — a real asset on open ag sites. Translucent white walls let you read the chemical line through the shell, and the white pigment reflects sun to keep contents cooler.

The empty shell is 220 pounds. Filled with a 1.5-SG liquid it reaches about 19,610 pounds — nearly ten tons over the broad footprint, the figure to design the base around. A 2-inch outlet with a siphon tube is installed low for a thorough draw, and the 16-inch lid handles filling and access. No inlet ships from the factory; add a bulkhead where your plumbing wants it.

The tank is molded seamlessly with no weld or joint, UV stabilizer in the resin, and Norwesco's 3-year defect warranty. We inspect each unit before it ships.

Technical Drawing

Official Norwesco technical drawing — 1550 Gallon Vertical Liquid Storage Tank - Natural White (87" x 67") #40235

Key Features and Specifications

1,550-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
67" tall x 87" diameter — compact vertical footprint
220 lbs empty, approximately 19,610 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
Install on a level, compacted surface. Ensure adequate clearance above for lid access and around the perimeter for plumbing connections and visual inspection
Ships via LTL freight — allow 2-3 weeks for delivery. Lift gate and residential delivery available at additional cost

Installation and Setup Guide

The squat 1550 is forgiving to install thanks to its low, wide shape, but ten tons of full load still presses every flaw in the base into the tank floor, and a wide tank that overhangs its pad strains at the edge. Get the base flat and fully supportive and the tank is trouble-free.

Site Preparation

Build a base covering the full 87-inch diameter with a little margin. A 4-inch compacted gravel pad or a level slab both suit this weight. Screed the surface flat within a quarter inch across the width; a wide, shallow tank tips on a high spot and loads one edge. Clear rocks and roots so the flat bottom rests on clean, supportive ground.

Placement and Connections

Aim the 2-inch siphon outlet at your pump and keep the run short. Use schedule-80 PVC or stainless, hand-tighten with a strap-wrench finish, and add a flex coupling before rigid pipe so the tank moves with temperature without straining the fitting. Allow roughly two feet of working clearance for sampling and inspection.

Venting

The wide top of this tank is the part most exposed to vacuum, so vent capacity is critical. If the pump draws faster than the vent admits air, that broad surface dimples inward. Size the lid vent to your fastest outflow, and on chemical service add a pressure-vacuum relief vent rated for the vapor.

Maintenance and Long-Term Care

Upkeep is minimal — a quarterly walk-around is the whole of it and catches small problems before they grow.

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Quarterly Inspection Checklist

Body: Look across the wide top and down the sides for any bulge or a flattened spot at the base, both pointing to overload or a settled pad.
Outlet: Check the 2-inch fitting for weeping and snug it by hand as the poly relaxes around it.
Foundation: Confirm the pad is level and water drains away from the tank edge.
Vent: Keep the lid vent screen clear so the broad top is never starved of air.

Cleaning

Drain through the siphon outlet, then flush with a rinse that neutralizes the previous chemical before changing products. Clean it from the top through the 16-inch lid using a spray wand. Trap the rinse for disposal under the guidance on the chemical's safety data sheet.

UV and Weather Protection

The resin UV package handles years outdoors; the sun-facing wall ages first, so check the south side annually for chalk or fading. In severe sun a shade panel on that face slows weathering.

Alternatives and Comparisons

The 1,550-gallon class is mostly about proportion. This squat, wide tank prioritizes stability and ground-level access for open or windy sites. A taller tank of similar volume narrows the base to save floor at the cost of a higher fill point. For batch work needing a clean drain, a cone-bottom design beats this flat bottom's small heel. And for water rather than chemistry, the matching black water tank in this size costs less by carrying a lighter 1.1-SG wall instead of this 1.5-SG build.

Frequently Asked Questions

How long will the 1550 Gallon Vertical Liquid Storage Tank - Natural White (87" x 67") #40235 last?

Fifteen to twenty years is realistic when the tank stays within its 1.5 specific-gravity rating, sits on a flat base, and holds compatible chemistry. The seamless shell and in-resin UV package make it durable; early failures trace to a too-heavy liquid, a clogged vent collapsing the wide top, or chemical attack on incompatible plastic.

What chemicals can I store in this tank?

At 1.5 SG it suits most liquid fertilizers, ag chemicals, and many acids and bases up to 12.5 pounds per gallon. These are compatible with polyethylene, but strong oxidizers, many solvents, and fuels are not. Confirm the product against a poly compatibility chart and check its density before you charge the tank.

What kind of foundation does a 1550-gallon tank need?

A full load is about 19,610 pounds over the 87-inch base. A 4-inch compacted gravel pad or a level slab sized to the diameter handles it. Because the tank is short and wide, flatness within a quarter inch is the controlling factor, along with clearing any rock from under the bottom.

Does this tank come with a warranty?

Yes, the tank carries a three-year Norwesco warranty against workmanship and material defects such as pinholes and molding flaws. Excluded are loads over 1.5 SG, chemical attack, a faulty foundation, and impact damage. Retain the receipt and a record of the install to support any claim down the road.

Can I install this tank underground?

No. It is an above-ground tank whose flat walls are not made for burial loads; burying it would collapse the tank and void the warranty. For below-grade needs, pick a ribbed, reinforced underground cistern engineered to carry soil loads.

Buying Considerations

Three checks before ordering. First, the low, wide shape — this tank wants 87 inches of ground width but under six feet of height, so it favors open pads. Second, the product: keep it within the 1.5-SG rating and confirm its weight. Third, freight — ten tons full wants a level pad, and the tank ships LTL needing a forklift or lift gate. Call us to arrange delivery to your site.