Conical Bottom Tanks
Conical bottom tanks (OTCB & ICB) are available in seamless molded one piece units from either virgin high density crosslink or FDA-compliant linear polyethylene.
Why a Conical Bottom Tank?
A funnel shaped conical plastic bottom with 30° or 45° slope is molded-in as are gallon markers and access openings. Wall thickness conforms to ASTM D-1998 standards for liquid containment.
— Excellent low temperature resistance
— UV stabilized against degradation
— Available in natural color or optional blue, green, yellow or black
Low-Maintenance, Long-Service Tanks
Conical Polyethylene Storage Tanks are built for demanding industrial liquid storage applications requiring durability, chemical resistance, and full-drain performance. Constructed from seamless, one-piece HDPE with UV stabilization, these tanks resist corrosion, impact, and harsh chemicals better
than steel or fiberglass alternatives. The cone bottom design ensures efficient material flow and complete discharge through a center outlet, reducing buildup and downtime. Ideal for chemical storage, wastewater treatment, fertilizer, and bulk liquid handling, conical polyethylene tanks deliver low-maintenance, long-service performance with customizable fittings and cost-effective installation.
Common Industries
Chemical Processing & Bulk Chemical Storage
Designed for chemical storage tanks in manufacturing and processing facilities, conical bottom tanks
provide safe containment for acids, caustics, concrete, polymers, and specialty chemicals. The sloped
bottom supports efficient chemical transfer and controlled dispensing, while HDPE construction
eliminates rust and corrosion common with steel tanks. Ideal for batch processing systems requiring
reliable material flow and easy tank cleanout.
Water & Wastewater Treatment Systems
In municipal and industrial facilities, conical tanks are widely used for coagulant storage, flocculant
mixing, brine storage, and sludge handling. The cone-bottom design promotes solids settling and
complete drainage, improving operational efficiency and reducing maintenance time. These
polyethylene wastewater tanks are resistant to aggressive treatment chemicals and outdoor
environmental exposure.
Agriculture & Liquid Fertilizer Storage
For ag retail, farm operations, and fertilizer blending plants, conical bottom tanks support liquid fertilizer
storage, UAN storage, micronutrients, and crop protection chemicals. The full-drain bottom allows for
accurate batching and product recovery, helping reduce waste and improve application precision.
UV-stabilized polyethylene ensures long-term outdoor durability.
Food & Beverage Processing
Conical bottom HDPE tanks are ideal for non-pressurized ingredient storage, blending tanks, and batch
processing systems. The bottom outlet configuration improves flow for syrups, flavorings, liquid additives,
and wash-down solutions, while the smooth interior surface supports easier cleaning and changeover
between batches.
Oil, Gas, & Industrial Fluids
Commonly used for brine water storage, drilling fluid containment, and chemical additives, conical
bottom tanks provide reliable performance in rugged field environments. The seamless polyethylene
construction resists corrosion from aggressive fluids, and the cone-bottom design ensures efficient fluid transfer with minimal residual product.
Large Conical Bottom Storage Tank Specifications
| Model Number |
CAD | Capacity (US Gals) |
Slope (degrees) |
Dimensions (in) | Weight(lbs) Linear & Crosslink Polyethylene |
Stand Drawing |
Stand Weight (lbs) |
Access Opening (in) |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Diameter | Length | 1.5 Sp. G | 1.9 Sp. G | 2.2 Sp. G | |||||||
| OTCB300 | CAD | 300 | 45 | 49 | 88 | N/A | 115 | 133 | ICS300 | 210 | Open Top |
| APCB560 | CAD | 560 | 30 | 54 | 90 | N/A | 180 | N/A | ICS560 | 215 | 16 |
| OTCB600 | CAD | 600 | 45 | 57 | 105 | N/A | 180 | 208 | ICS600 | 260 | Open Top |
| ICB1100 | CAD | 1100 | 45 | 69 | 116 | 173 | 218 | 255 | ICS1100 | 350 | 16 |
| OTCB1100 | CAD | 1100 | 45 | 69 | 109 | 173 | 218 | 255 | ICS1100 | 350 | Open Top |
| ICB1575 | CAD | 1575 | 45 | 86 | 121 | 325 | 450 | 521 | ICS1575 | 440 | 16 |
| ICB2200 | CAD | 2200 | 30 | 96 | 119 | 500 | 600 | 695 | ICS2200 | 440 | 24 Top Hinged |
| ICB2600 | CAD | 2600 | 45 | 86 | 159 | 540 | 700 | 811 | ICS2600 | 440 | 16 |
| ICB3000 | CAD | 3000 | 30 | 90 | 154 | 620 | 825 | 955 | ICS3000 | 450 | 16 |
| ICB4200 | CAD | 4200 | 30 | 96 | 177 | 850 | 1000 | 1158 | ICS4200 | 550 | 16 |
| ICB6000 | CAD | 6000 | 30 | 143 | 162 | 1800 | 1900 | 2200 | ICS6000 | 3200 | 24 Top Hinged |
| ICB8000 | CAD | 8000 | 30 | 143 | 190 | 2000 | 2600 | 3000 | ICS8000 | 3200 | 24 Top Hinged |
Small Conical Bottom Storage Tank
A funnel shaped conical bottom with 45-degree slope is molded-in allowing for complete drainage of your tank’s contents. These are often referred to as full drain, inductor, or mixing tanks. A variety of top access openings are available. These small cone bottom tanks are available with all polyethylene conical support stands.
— 7″ cap is typical
— optional 11″ cap
— 16″ lever-locking cover
— Or special fume tight access openings
Small Conical Bottom Tank Specifications
| Model Number |
CAD | Capacity (US Gals) |
Slope (degrees) |
Dimensions (in) | Sp.G. |
Wgt. |
Sp.G. |
Wgt. |
Sp.G. |
Wgt. |
Stand Drawing |
Stand Weight |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diameter | Height | ||||||||||||
| ICB60 | CAD | 60 | 45 | 35 | 46 | 1.5 | 29 | 1.9 | 29 | 2.2 | 29 | APCS-35 | 77 |
| ICB100 | CAD | 100 | 45 | 35 | 56 | 1.5 | 35 | 1.9 | 35 | 2.2 | 35 | APCS-35 | 77 |
| ICB200 | CAD | 200 | 45 | 35 | 80 | 1.5 | 50 | 1.9 | 50 | 2.2 | 50 | APCS-35 | 77 |
| ICB250 | CAD | 250 | 45 | 48 | 72 | 1.5 | 66 | 1.9 | 66 | 2.2 | 66 | APCS-48 | 110 |
| ICB350 | CAD | 350 | 45 | 48 | 85 | 1.5 | 77 | 1.9 | 77 | 2.2 | 89 | APCS-48 | 110 |
| ICB500 | CAD | 500 | 45 | 48 | 105 | 1.5 | 125 | 1.9 | 125 | 2.2 | 46 | APCS-48 | 110 |
Conical Bottom vs. Full-Drain Outlet Tanks
Both tank types are durable, but your choice should align with your intended use. And whether you prioritize complete drainage, gravity flow, or other specific features, both tank types have their unique advantages. Compare and contrast the benefits, maintenance, and use-cases of Full-Drain Outlet (FDO) and Conical Bottom Tanks below.
FAQs
Curious about Assmann storage solutions? Listed below are the most common questions about our Conical Bottom Storage Tanks. If you have additional questions about your next polyethylene storage tank, contact our experts.
What's the under clearance from the Cone Tip?
Assmann Conical Bottom Storage Tanks come standard with 14” of under clearance from the floor to the cone tip. This height can be adjusted by contacting us to order a custom configuration for your conical tank stand. Regardless of your storage need, it’s important to maintain space beneath the tank to allow for pipes, valves, and the tank connection.
Can I build my own tank stand?
We do not recommend that you build your own conical stands. Our conical tank stands have a full pan design, with the cone tip completely supported by metallic sheeting material. In contrast, competitor designs use rods that run every 12 or 18 inches, which can cause the cone tip to sag through the frame.
What are the benefits of a full-pan design conical stand?
Allowing the polyethylene cone tip to sag and bulge through the framework can significantly reduce the lifespan of the tank and even cause tank failure. That’s why we choose the full-pan fully supported design.
How do you clean a conical bottom tank?
Warm water and detergent can be used to clean a conical bottom tank.
What fittings and accessories are most common for a conical bottom tank?
Bulkhead fittings are the most common accessory for conical bottom tanks.
Do conical tanks require special stands?
Yes, conical bottom tanks require a type of stand for installation. Assmann’s conical tank stands have a full pan design, with the cone tip completely supported by metallic sheeting material. In contrast, competitor designs use rods that run every 12 or 18 inches, which can cause the cone tip to sag through the frame.
Are conical tanks FDA-approved?
Yes, conical bottom tanks can be FDA-compliant. As we talk about your storage tank, we’ll make sure we configure it according to your business standards.
What materials are conical tanks made from?
Assmann conical bottom tanks are made from either cross-linked polyethylene (XLPE) or Linear polyethylene (LLDPE).
Related Accessories
Preserve the life and efficiency of your tank with accessories customized to your specific tank.
Agitator Support Brackets
Self-supporting agitator support brackets are designed to handle mixers with horse power ratings of 3 or 5 HP. Agitator support stands are made from mild steel and are epoxy painted as a standard.
Fill Line Assemblies
These assemblies make it possible to fill the plastic storage tank from a convenient position outside the tank.
Fiber Reinforced Ladder Assemblies
Ladder assemblies are available in three configurations: platform, straight ladder with cage, and ladder with cage and platform.
Ready to bring Assmann products to your line of work?
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Chemical Resistant Data
Maintain safety and efficiency with Assmann’s chemical resistant data chart.