125 Gallon 15 Degree Cone Bottom Tank with Poly Stand: Complete Buyer's Guide
125-gallon white cone bottom tank built for full-drain mixing and batch processing. Manufactured by Norwesco from virgin linear polyethylene (HDPE) rated to handle liquids up to 12.5 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 1.5 — 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 125 Gallon 15 Degree Cone Bottom Tank arrives as a complete package: the cone vessel plus a matched molded polyethylene stand. That pairing turns it into a drop-in mixing and dosing station for small-batch chemical work, the kind of footprint that fits in a corner of a mix room or alongside a process skid. The 15-degree cone drains the tank by gravity to essentially nothing, so a batch never carries over into the next.
The body is rotationally molded in one seamless piece from virgin linear polyethylene rated to 1.5 specific gravity, handling liquids up to 12.5 pounds per gallon. UV stabilizers are built into both the tank and the stand for outdoor durability, and the assembly carries a 120 F / 48 C continuous-service rating. The natural-white wall is translucent, so the liquid level reads at a glance and the cone shoulder can be inspected for stress without opening up.
At 41 inches tall and 48 inches in diameter, the tank weighs just 87 pounds empty and about 1,651 pounds full at 1.5 SG — light enough that no engineered foundation is needed. A factory 2-inch NPT outlet at the cone tip handles full drainage, and an 8-inch lid serves for filling, venting, and access. Because the matched stand is included, the cone-to-seat fit is engineered as a unit, with nothing to weld and no steel to rust.
Technical Drawing
Official Norwesco technical drawing — 125 Gallon 15 Degree Cone Bottom Tank with Poly Stand
Key Features and Specifications
- 125-gallon capacity — sized for full-drain mixing and batch processing
- Constructed from virgin linear polyethylene (HDPE) with 1.5 specific gravity rating — handles liquids up to 12.5 lbs/gal
- 41" tall x 48" diameter — compact vertical footprint
- 87 lbs empty, approximately 1,651 lbs when full at rated specific gravity
- 2" fitting with 2" siphon NPT outlet fitting — factory installed and leak-tested
- 8" lid opening for fill, venting, and interior access
- FDA approved for potable water and food-grade liquid contact
- 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
- Must be installed on the manufacturer-supplied or compatible stand rated for the full loaded weight. Never rest a cone bottom tank directly on its apex
- Ships via LTL freight on a pallet — residential delivery with lift gate available
Installation and Setup Guide
This is the cone-bottom tank that ships ready to stand on its own. The 125-gallon vessel comes paired with a molded polyethylene stand, which removes the single biggest variable in cone-tank installation: you are not sourcing, fabricating, or guessing at structural steel. The engineering of the stand-to-cone fit is already solved, and your job is simply to set the assembly down correctly and plumb it.
Where to Set It
Full, this tank and stand weigh only about 1,651 pounds at the 1.5 SG rating, so it does not demand a poured engineered foundation the way the big cones do. What it does demand is a hard, level surface that will not soften. A concrete floor is ideal; a compacted, well-drained pad works outdoors. At 48 inches across the base and 41 inches to the top of the tank before the stand lifts it, the footprint is compact enough to live in a corner of a mix room, but leave room to read the wall and reach the valve.
Setting the Poly Stand
Because the stand is itself polyethylene, it flexes slightly and beds best on a continuous flat surface. Do not perch its feet on isolated blocks or an uneven slab seam, which point-loads the plastic legs. Once it sits flat, the cone drops into its matching seat and the load distributes through the molded structure as designed. The standing rule for every cone tank still applies: the apex is a drain point, never a support point.
Outlet and Venting
The 2-inch NPT outlet at the cone tip is your full-drain port. Keep the pipe run short and supported so its weight does not lever on the fitting, and add a hand valve for batch control. The 8-inch lid is the fill and vent point; for any chemistry that off-gasses, run a small relief vent rather than sealing it. On a tank this size a simple screened breather usually suffices, but match the vent to the chemical, not to the gallon count.
Maintenance and Long-Term Care
The maintenance story here is the simplest in the cone family because the supplied poly stand will not rust, rot, or scale the way a steel frame can. That shifts your attention from corrosion of the support to the condition of the plastic itself and the cleanliness of the batch path.
What to Watch
- Stand legs: Inspect the molded legs and feet quarterly for stress whitening or splaying. Poly stands are durable but not infinitely stiff; a leg that has begun to bow under repeated full loads is telling you the floor underneath is no longer flat.
- Cone seating: Confirm the tank still nests fully in the stand's seat. A small cone like this is easy to bump out of position during cleaning.
- 2-inch outlet: Check the lowest fitting for weeping and hand-tighten if the joint has relaxed. Never put a pipe wrench to the poly threads.
Cleaning Between Products
Drain to empty through the cone, then rinse. The whole point of buying a cone over a flat-bottom drum is that this rinse actually clears the vessel instead of leaving a puddle. When switching chemistries, decontaminate per the new product's instructions and confirm polyethylene compatibility before refilling. Cone duty is chemical-service work; this tank is not a drinking-water vessel.
Sun and Resin Care
The natural-white wall lets you eyeball the level by backlighting and lets you catch stress whitening at the cone shoulder early. UV stabilizers are compounded into both tank and stand, but if the unit lives in direct sun, give the sun-facing side a yearly look for surface chalking. Indoors, which is where most 125-gallon mix tanks end up, UV is a non-issue.
Alternatives and Comparisons
The defining feature of this listing is the included poly stand. A bare cone tank is useless until it has something to hang in, so a matched stand-and-tank package at 125 gallons is the fastest path to a working mix station.
Stand included vs. tank only: Buying the assembly means the cone-to-seat fit is engineered and warranted as a unit, with no welding, no rust, and nothing to fabricate. If you already own a compatible stand or need a steel frame to integrate with existing process structure, a tank-only cone may suit you better. Against a flat-bottom 125-gallon drum, this package costs more and stands taller, but it drains to essentially zero, which a flat tank never will.
Other 125-Gallon Options
Frequently Asked Questions
How long will the 125 Gallon 15 Degree Cone Bottom Tank with Poly Stand last?
Used within its 1.5 SG and 120 F ratings and kept on a level surface, this tank and stand should give 15 to 20 years. Small cone vessels tend to do well because they self-drain and rarely sit full for long stretches. The poly stand removes corrosion from the equation entirely, so service life comes down to chemistry and how the unit is loaded.
What chemicals can I store in this tank?
It accepts the broad 1.5-SG range of agricultural and industrial liquids: fertilizers, many acids and bases, and water-treatment chemistry within that density. Always check a polyethylene compatibility chart before introducing a new product. It is not rated for fuels or solvents. As a cone-bottom mixing tank it is built for chemical batching, not potable water.
What kind of foundation does a 125-gallon tank need?
No engineered concrete foundation is required. Full, the package weighs only about 1,651 pounds at 1.5 SG, so a hard, level floor or a compacted, well-drained pad is enough. The one firm rule is that the surface stay flat so the poly stand beds evenly and the legs do not point-load.
Does this tank come with a warranty?
Yes. Norwesco covers the tank against manufacturing defects in materials and workmanship under normal use. The coverage addresses molded-in faults like pinholes and cracks, not damage from overloading, incompatible chemicals, or abuse of the stand. Keep your receipt and a photo of the installed assembly.
Can I install this tank underground?
No. This is an above-ground cone-and-stand assembly with no capacity to resist soil pressure. Burying it would crush the cone and void the warranty. For below-grade needs, our underground cistern and septic products are reinforced for that purpose.
Buying Considerations
Confirm three points before ordering this 125-gallon package. First, headroom: the tank rides up on its stand, so measure floor-to-lid clearance and your fill access, not just the 41-inch tank height. Second, the surface, which only needs to be hard and dead level rather than an engineered slab, since the wet weight is a modest 1,651 pounds at 1.5 SG. Third, delivery, which is straightforward at this size and palletizes for standard freight. The tank and matched poly stand are sold together, so you receive a complete, ready-to-plumb mixing setup in one shipment.
Related Products You May Need
Questions? Call (866) 418-1777 — our team knows these products inside and out and can help you select the right tank for your application.
Recommended Tanks for This Guide
Live pricing, updated automatically · estimate freight to your ZIP.