12500 Gallon Plastic Vertical Liquid Storage Tank in White

Sixteen feet six inches on a 142 inch pad, and the straps that go on while it is empty

Put the tank on the ground properly and most of the rest of the installation looks after itself. The floor of this tank is a 142 inch circle, eleven feet ten inches across, and it is a molded surface that bears on everything it touches and on nothing it does not, so the load path is decided entirely by the flatness of what is under it. At the rating on the sheet that load is 156,375 pounds, which is a foundation question rather than a groundworks question: a designed slab, level, continuous, in full contact, carried out past the tank wall instead of stopped at it, with the surround graded so water leaves the pad rather than running along its edge. The framework is in the concrete pad sizing guide, and where the liquid is regulated the containment gets designed with the pad rather than added afterwards. Above ground level, 198 inches is sixteen feet six inches, which asks two things of the site: clear air over the crown so the 18 inch manway can actually be opened, and restraint, because an empty 3,100 pound shell at that height is a sail in any wind worth the name. Cable or band it to structure or to anchors set with the pad, do it before the first fill, and retension after the first full summer. This is also the sheet in the family that tells you the wall's limits, so use them: at 120 F / 48 C, a liquid that arrives hot from a process or sits in full sun in a black-topped yard is a question to answer before the order rather than after. Run the working volume, the headspace a warm liquid needs and the reserve you keep in hand through the tank sizing calculator and the tank sizing guide.

The 12,500 gallon walls read by rating rather than by colour

Four tanks share this exact shell at 142 x 198 in and 3,100 lb, so the decision is never the silhouette, it is the wall and what it is rated for. This page is the white one rated 1.5, and the specific reason to buy it is that the sheet commits to more than the others do: a rating, a 120 F / 48 C ceiling and a 3 Year Warranty in writing. The same shell in a black wall is the choice when the liquid is degraded by light and nobody needs to see the level through the wall; the cross-link grade is the choice when the chemistry wants cross-linked polyethylene instead of the linear resin. Each carries its own rating on its own sheet and this page asserts none of them. The one real step up inside the shell is the heavier white tank on the same base, listed at 199 in and a good deal heavier on its own sheet, which is what a denser liquid buys; the trade is a heavier lift, a heavier load on the slab and no published service limit on that sheet. Outside the shell, SII-32074 holds 12,000 gallons at 197 in and 2,482 lb for a liquid near the weight of water, and 3030100C26 takes 15,000 gallons onto a 165 inch base at 184 in and 4,400 lb, which is the wider, shorter way to add volume when the roof is the constraint rather than the floor.

Comparing against another maker? Send the competing spec to 866-418-1777 or a quote request and we will show the differences honestly.

The 3 inch outlet, the 18 inch manway, and the 120 F limit the sheet prints

• Outlet: a 3 inch polypropylene female NPT bulkhead fitting at the base, as the sheet lists it, and the only liquid connection the sheet names. Make the thread up once with a sealant matched to the service and set a union or a flange a short way downstream, so that every future valve change happens on the pipe and never on the tank. Keep a wrench path clear around it and keep it out of a buried box.
• Head and rating together: sixteen feet six inches of liquid stands over that fitting when the tank is full, and at a rating of 1.5 the pressure at the base is half again what the same height of water would give. Rate the valve, the gaskets and the first run of pipe for the liquid, not for the tank, and carry the first valve on its own support off the pad.
• Pump: below the outlet, on its own base, with a short falling suction run so the column holds it flooded. Size it on the real density and viscosity rather than on a water curve, and give it a cleanable strainer and a run-dry cut-out that stops it with liquid still over the fitting.
• Service limit: 120 F / 48 C is on this sheet, which makes it a design input rather than a guess. Hot fill, steam cleaning and a process return that arrives above that limit all need to be engineered around it, and where a liquid is close to the ceiling, the shade side of the yard and a white wall are both worth more than they look.
• Access and fill: an 18 inch threaded vented manway on the crown at 198 in, with fixed access and a rail for anyone who opens it, and the vent kept clear whenever a pump is running. The sheet lists no inlet, so specify the fill connection deliberately, at working level or as a drop pipe inside the shell, rather than tipping a delivery in through the manway.

Two more things separate a tank that lasts from one that gets replaced early. The first is that the headspace, not the liquid, is where a polyethylene vertical usually shows its age, so anything that concentrates vapour up there, a hot liquid, an aggressive chemistry, a vent that cannot breathe, gets treated as a wall problem rather than a nuisance. The second is instrumentation: a level reading taken at ground level on an instrument, logged, and compared week to week tells you about pad settlement, thermal movement and slow loss long before anyone notices a stain on the concrete. Put both in the installation from the start and the 3 Year Warranty becomes a formality rather than a plan.

Process storage, dense chemistry, and what the small-tank guides teach about the big one

At 12,500 gallons with a wall rated 1.5 and a published 120 F / 48 C ceiling, this tank goes where a plant needs bulk holding with numbers attached: process and utility water, bulk chemical and additive storage, brine and solution holding, fertiliser and crop input storage at a dealer, wastewater equalisation ahead of treatment, and reclaimed or recycled liquid held between stages. The engineering habits that matter here are the same ones that matter on a small vertical, only with more consequence, and the buyers guides written around the smaller shells are a good place to learn them cheaply: the 500 gallon vertical buyers guide on fittings and first fill, the buyers guide to the smallest of these verticals on where a day tank belongs in a system, and the 2000 gallon vertical buyers guide on pads, straps and pump layout. Where the duty is water held against fire rather than liquid held for work, the fire-water reservoir design guide sets out what turns stored gallons into a reserve somebody can count on.

Nebraska to the pad at class 400, 3,100 pounds empty and a 3 year term

The SII-5350000C37 is molded at Lincoln, Nebraska, ships at class 400 as the sheet lists it, and moves as an oversize load shipping at 142 inches by 142 inches by 198 inches. Eleven feet ten inches of width is what the carrier cares about: it is a permitted load, it needs somewhere to stop, and it needs a machine with the capacity to lift 3,100 pounds and the reach to stand a sixteen foot tank up on a slab. Book the unloading before the freight, walk the route for overhead lines and gate widths, and have the slab cured and level on the day, because moving a tank of this size twice is the most expensive mistake available on this order. The freight cost estimator prices the lane to your ZIP, and the listed price is before freight. Slings under the body, never a hook through the manway. Once it is standing and strapped, fill it with clean water and hold it before any product goes near it, reading the base, the pad edge and the outlet thread through the hold. Register the delivery date against the 3 Year Warranty in your own records the week it lands, because a warranty term is only as good as the paperwork behind it. Save the pallet; a tank that ever has to move again is easier to move on it.