525 Gallon Vertical Liquid Storage Tank: Complete Buyer's Guide
A 525-gallon vertical liquid storage tank from Norwesco, seamlessly rotomolded in 1.5-specific-gravity polyethylene — a half-thousand-gallon chemical reservoir for spray operations, mixing, and bulk day storage.
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.
Installation and Setup Guide
At 525 gallons the tank crosses into reservoir territory: filled, it carries well over two tons of chemistry, so the pad does real work and containment becomes a genuine consideration.
Site Preparation
Set this tank on a firm, level surface built for the load — a compacted gravel pad or a concrete slab covering the full base. Over two tons of dense chemistry has to land on ground that will not settle, so level and compact carefully and rake out every stone. Where the chemical warrants it, build the pad with a curb or berm sized to contain the volume.
Placement and Connections
Give the tank room to be serviced on all sides for routine work and spill response. Plumb the outlet to your transfer pump by the shortest run, using chemical-rated flexible couplings off the fitting, and spec every gasket and valve to the chemistry rather than just the thread.
Venting
Size the vent to your peak fill and draw so the wall neither collapses under vacuum nor bulges under pressure, and where the chemical off-gasses, fit a pressure/vacuum relief vent rated for that vapor.
Maintenance and Long-Term Care
A 525-gallon chemical tank deserves a real quarterly inspection — the contents now weigh enough that foundation and containment matter alongside the shell and seals.
Quarterly Inspection Checklist
- Shell and base: walk the tank for bulging, stress whitening, or weeping, hardest on the lower wall under the deepest liquid.
- Seals and outlet: inspect the fitting, gaskets, and valves for chemical attack; hand-snug only, no wrench.
- Foundation and containment: check that the pad is level and any containment remains intact.
- Vent: make sure the relief vent is clear and functioning.
Cleaning and Chemical Changeover
Before switching products, decontaminate to the manufacturer's protocol and capture and dispose of the rinsate per label and regulation. Triple-rinse using a compatible solution, then verify the next chemical against the polyethylene and every seal before refilling.
UV and Weather Protection
The reflective white wall keeps contents cooler but transmits some light; in strong sun inspect the wall annually and consider shade for algae-prone or light-sensitive chemistry.
Alternatives and Comparisons
The 525 is a half-thousand-gallon chemical reservoir bridging working tanks and bulk storage. A cone-bottom of similar volume drains completely for batch processing but stands taller on a stand; the 750-gallon vertical is the next step up in straight storage capacity. Choose by whether you store and transfer or mix and fully drain.
Other -Gallon Options
Frequently Asked Questions
How long will the 525 Gallon Vertical Liquid Storage Tank last?
With compatible chemistry, a sound pad, and use within its 1.5 SG and 120 F limits, expect 15 to 20 years. At this volume the foundation and chemical compatibility are the dominant factors in how long the seamless shell lasts.
What chemicals can I store in this tank?
With a 1.5 specific gravity rating it stores agricultural chemicals, fertilizers, and industrial solutions of that weight, and its resin is FDA food-grade compliant. No fuels, solvents, or flammables, and be cautious with oxidizers and hydrocarbons that attack polyethylene. Confirm the chemical, its concentration, and your seals before filling.
Does this tank come with a warranty?
Norwesco warrants the shell against factory defects in normal service — molding voids, pinholes, fittings. It does not cover overloading, a bad pad, chemical attack, or impact. Keep records for any claim.
Can I install this tank underground?
No. It is an above-ground tank, and its walls will not resist soil pressure — burial risks collapse and voids coverage. Buried chemical storage requires tankage built specifically for underground service.
Buying Considerations
Three checks before ordering: a level, well-drained pad for over two tons (with containment if the chemistry requires it); a chemical confirmed compatible with the polyethylene and seals at or under 1.5 SG; and a delivery plan suited to a tank this size. Call us with your site details and we will arrange the right shipping and unload.
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Questions? Call (866) 418-1777 — our team knows these products inside and out and can help you select the right tank for your application.
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