2500 Gallon Plastic Water Storage Tank - Black (102" x 79"): Complete Buyer's Guide
2,500-gallon black water storage tank built for safe potable water storage. Manufactured by Norwesco from virgin linear polyethylene (HDPE) rated to handle liquids up to 9.2 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 1.1 — the tank is engineered for liquids up to 1.1× the density of water (water is about 8.34 lb/gal). Confirm your fluid’s SG before storage.
Product Overview
The 2500 Gallon Plastic Water Storage Tank in black, in its broad 102-inch-diameter form, is the squat, stable way to bank 2500 gallons. At only 79 inches tall over an eight-and-a-half-foot-wide base, it keeps a heavy reserve low to the ground — well suited to sites with vertical clearance limits, exposed windy locations, or anyone who simply wants the most planted-feeling tank in this volume class.
It is rotationally molded as one continuous piece of virgin linear polyethylene, so there are no seams or welds anywhere to fail. The 1.1 specific gravity rating engineers the wall for liquids up to 9.2 pounds per gallon — water and most common liquids fit comfortably inside that range. The black wall keeps UV off the resin and light out of the water, so algae has nothing to grow on.
The wide 102-inch base spreads the load over almost 57 square feet, the largest footprint of any 2500-gallon option here. Empty weight is 320 pounds; full with rated water, the pad carries roughly 23,255 pounds. A factory 2-inch NPT outlet handles discharge, and an unusually large 22-inch lid gives generous access for cleaning, inspection, and equipment.
Key Features and Specifications
- 2,500-gallon capacity — sized for safe potable water storage
- Constructed from virgin linear polyethylene (HDPE) with 1.1 specific gravity rating — handles liquids up to 9.2 lbs/gal
- 79" tall x 102" diameter — compact vertical footprint
- 320 lbs empty, approximately 23,255 lbs when full at rated specific gravity
- 2 NPT outlet fitting — factory installed and leak-tested
- 1.5 NPT inlet fitting included
- 22" 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
- UV-resistant black pigmentation provides maximum outdoor durability and inhibits algae growth in stored liquids
- 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
This 2500-gallon tank is all about its footprint: at 79 inches tall on a 102-inch base it is decisively wider than it is high, so the 23,255-pound full load spreads across nearly 57 square feet — the gentlest ground pressure of any tank this size in the lineup. The low silhouette also shrugs off wind. The catch is geometric: a 102-inch flat bottom is a huge mirror for any flaw in the pad, so flatness over that whole span is the install.
Site Preparation
Engineer the foundation for the load and the diameter together. A four-inch (or thicker, per a structural pro) reinforced slab or a deep, well-compacted crushed-stone ring should extend a foot past the 102-inch base and sit flat to a quarter inch across the full width — which is a demanding tolerance over eight and a half feet. Any high or low spot in that broad circle concentrates 23,255 pounds onto a smaller area than intended.
Placement and Connections
Take the discharge off the factory 2-inch outlet and tie the first run in with a flexible coupling rather than hard pipe; even a short, low tank breathes thermally and a rigid line drives that into the bulkhead over time. Keep the plumbing low and direct. The generous 22-inch lid makes it easy to fit float switches or a submersible pump while you are at it. Bring the threads up by hand to a quarter turn past snug.
Venting
Pulling 2500 gallons out of a wide tank still requires the same 2500 gallons of air to flow back in, and the 22-inch lid is your relief path. Keep its screened vent open so the shell can breathe; a blocked vent on even a low-profile tank pulls a vacuum that can dish the broad top inward during a hard draw-down. The large lid makes the vent easy to inspect and clear.
Maintenance and Long-Term Care
A 2500-gallon black potable tank with a wide, low body is among the easiest large tanks to maintain — the 22-inch lid means you can actually reach inside, and the dark wall keeps algae starved of light. The seasonal routine below guards water quality and the broad foundation that supports the load.
Quarterly Inspection Checklist
- Wall sweep: Circle the 102-inch shell and check the lower wall for any outward swell that flags a settled pad or water heavier than rated.
- Outlet check: Feel around the 2-inch bulkhead for dampness and hand-snug if it has crept loose over the season.
- Foundation audit: Inspect the wide perimeter for any settling or washout; over a 57-square-foot footprint, one soft spot quietly takes more load than it should.
- Vent and 22-inch lid: Confirm the screened vent is clear and the large lid gasket seats fully, since that big opening is the main route for contaminants.
Cleaning
Drain all 2500 gallons through the 2-inch outlet annually, rinse, and sanitize with a 50-ppm chlorine solution held about an hour before refilling for drinking use. The 22-inch lid is a real advantage here — you can reach in to wipe down the broad floor and clear the sediment that collects across a 102-inch base far more thoroughly than through a small opening.
UV and Weather Protection
Black is the most UV-resistant color this tank comes in, and the stabilizer compounded into the resin keeps the wall sound for years; it does, however, deplete under sustained sun. Glance over the south-facing arc each year for chalking, and in extreme desert exposure a shade screen extends an already long service life.
Alternatives and Comparisons
This wide 102-by-79 black tank is the low, stable, easy-access take on 2500 gallons, where the taller 95-by-91 version trades footprint for height. Below it, a 2000-gallon tank lightens the foundation; above, the 3000- and 5000-gallon tanks step the reserve up. Weigh the footprints — this one needs the most ground but applies the least pressure.
Other 2500-Gallon Options
Frequently Asked Questions
How long will the 2500 Gallon Plastic Water Storage Tank - Black (102" x 79") last?
On an engineered pad, within its 1.1 SG and temperature limits, with the annual cleaning the 22-inch lid makes easy, this wide black 2500-gallon tank comfortably reaches fifteen to twenty years. The seamless wall has no weld to open and black is the toughest UV color; the broad, low body also makes wind and tipping non-issues. A settling pad or stale water ends tanks early, not the resin.
What chemicals can I store in this tank?
Built and FDA-approved for potable water and food-grade liquids, it also holds lighter farm and industrial solutions within its 9.2-pound-per-gallon rating. Keep fuels, solvents, and flammables out, and check any chemical on a poly compatibility chart first, since most acids and bases are fine but certain oxidizers are not.
What kind of foundation does a 2500-gallon tank need?
With roughly 23,255 pounds spread over a 102-inch base, plan an engineered reinforced slab or a deep compacted crushed-stone ring extending past the base and held flat to a quarter inch — a demanding tolerance over eight and a half feet. Have a structural professional specify it for your soil.
Does this tank come with a warranty?
Yes. Norwesco's 3-year warranty covers manufacturing defects under normal use — factory faults, not overfilling past rating, a poor foundation, chemical attack, or impact. Keep your receipt and install photos for any claim.
Can I install this tank underground?
No. The flat wall is engineered for above-ground service only and cannot resist soil pressure; burying it risks collapse and voids the warranty. Use a ribbed underground cistern for below-grade storage.
Buying Considerations
Confirm three things before ordering: that nearly 57 square feet of pad area is available where you want it, that a structural professional has sized the slab for the 23,255-pound load over a 102-inch base, and that you have LTL freight plus the equipment and access to offload a tank this wide.
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