40 Gallon Vertical Liquid Storage Tank - Natural White (18" x 42") #41535: Complete Buyer's Guide
40 Gallon Vertical Liquid Storage Tank - Natural White (18" x 42") #41535 from Norwesco.
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
This 40-gallon chemical tank, part number 41535, is a small vertical vessel — about 42 inches tall on an 18-inch base — light enough that a full load is a few hundred pounds at most, so weight barely figures into the install. What matters is a flat, stable spot, secure mounting for a slim light tank, and clean chemical plumbing to whatever it feeds.
Site Preparation
Set it on a small level surface sized past the 18-inch base — a paver, a load-rated shelf, or a flat patch of concrete — shimmed flat so the slim 42-inch body stands true. Because the tank is both light and fairly tall for its width, fasten or strap it wherever it could be knocked; a small chemical tank that tips is a spill, so restraint matters more than it would for water.
Placement and Connections
Run the discharge off the lowest fitting with a chemically compatible flexible connector for the first segment so the tank can shift slightly without straining the bulkhead. Drill and add a compatible bulkhead for fill if your plumbing needs one. Use chemical-rated tubing and hand-tighten every fitting only a quarter turn past snug — the small fittings on a tank this size are the easiest of all to crack with a wrench.
Venting
A small chemical tank still needs to breathe. Hold the lid vent or fill opening clear so air flows both ways as you draw and refill, adding a chemical-rated pressure/vacuum relief vent for any volatile contents. Even 40 gallons can deform a sealed tank under a brisk pump-down, so keep the relief path open.
Maintenance and Long-Term Care
A 40-gallon chemical tank is the simplest vertical to maintain — small enough to inspect, drain, and decontaminate in one short session. Maintenance is chemical-tank work, not potable, centered on compatible fittings, a clear vent, and proper cleaning between products.
Quarterly Inspection Checklist
- Quick visual: Glance over the whole slim body for swelling, cracking, or weeping at the fitting; every surface is visible at this size.
- Fitting check: Hand-snug the outlet and any bulkhead, taking extra care since the small poly fittings are easy to over-torque.
- Mount check: Confirm the shelf or pad is sound and the light, slim tank has not shifted or begun to lean.
- Vent and opening: Confirm the vent or fill opening is unobstructed and, for volatile contents, that the pressure/vacuum relief is rated to the chemical.
Cleaning
Follow the chemical manufacturer's decontamination guidance on each product change, since even a small tank's residue cross-contaminates after a mere rinse. Drain it through the outlet, flush by the supplier's procedure, and dispose of the rinse waste properly. It is a chemical vessel and should never be repurposed for potable water.
UV and Weather Protection
A 40-gallon tank is trivial to keep out of direct, all-day sun — under a roofline, in a shed, or indoors — which spares the translucent wall most UV exposure. If it must live outdoors, check the sun-facing side yearly for chalking and consider relocating it into shade, which is effortless at this weight.
Alternatives and Comparisons
Forty gallons (tank 41535) is point-of-use chemical supply, not bulk storage. If you refill it constantly, the 75- and 100-gallon verticals carry more without much more floor space; the 25-gallon tank handles even smaller needs. Size it to your actual draw instead of under-buying.
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 -Gallon Options
Frequently Asked Questions
How long will the 40 Gallon Vertical Liquid Storage Tank - Natural White (18" x 42") #41535 last?
Kept on a flat, secure support, within its rated density, and properly decontaminated between products, a 40-gallon chemical tank lasts well over a decade — often longer, since it is easy to shield from sun and simple to maintain. What usually ends its life is an incompatible chemical, not the years.
What chemicals can I store in this tank?
It suits agricultural chemicals, liquid fertilizers, and lighter industrial solutions within its specific-gravity rating, provided you check each chemical on a polyethylene compatibility chart before storing it. Fuels, solvents, and flammables have no place in it. It is a chemical tank rather than a drinking-water vessel.
Does this tank come with a warranty?
Yes, it carries the manufacturer's warranty against defects in materials and workmanship under normal use — factory faults only, not chemical attack, a drop, or other misuse. Hang on to your receipt should you ever need to file a claim.
Can I install this tank underground?
No. Even at 40 gallons this is an above-ground tank with a wall not built for soil pressure; burying it risks collapse and voids the warranty. For anything below grade, choose a small underground tank built for burial.
Buying Considerations
Confirm a small flat surface and a secure mount for a slim, light tank, keep it near the process it feeds, and verify the chemistry against polyethylene before dedicating the tank to it. Its low weight makes it easy to relocate if your needs change.
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