American-Made Water Management Solutions

We are liquid management experts and the largest provider of tanks in the Western Hemisphere. We proudly manufacture our products in multiple locations throughout the U.S. Rotoplas is not only committed to building tanks but to building better tanks. Rotoplas recognizes our responsibility to improve people’s lives through our water, agricultural and chemical storage solutions, and that’s what inspires us to keep innovating. We stand behind all of our products because we stand behind the people who rely on them and rely on us in the countries where we operate.

We work closely with distributors by providing long-term and reliable support with on-site training and assisting with the final sale to the end-user. We have world-class customer service, longer warranties, unique design qualities, and high-quality products to fit your individual needs. We work hard to deliver you the best results!

Frequently Asked Questions

Yes, our tanks are certified by the FDA and safe for chemicals and foods with an SPG rating of 1.9 or lower.

Consult Chemical Resistance Guide in the Rotoplas Catalog**

No, our tanks are made with 100% raw materials that do not change the chemical or physical characteristics of the stored product.

Our tanks come in a variety of colors. Our AquaTech tanks come in Black, Green and Sand. Our AgroTech and ChemTech tanks come in White and Black.

  • Chemical to store
  • Specific gravity rating
  • Concentration
  • Volume
  • Temperature

The resin used to manufacture our linear polyethylene tanks (HDLPE) meet specifications contained in FDA Regulations 21 CFR 177.1520, © 3.2 and may be used as an article or component of articles intended for use in contact with food, subject to any limitations in the regulation. Cross-linked polyethylene (XLPE) tanks do not meet FDA regulations. The HDLPE resin that Rotoplas uses is also NSF 61 approved. Links to NSF Certification, ASTM- 1998, and FDA certifications can be found at

A tank with a specific gravity of 1.5 can hold a liquid up to 12.5 pounds per gallon at 100°F. A tank with a specific gravity of 1.9 can hold a liquid up to 15.75 pounds per gallon at 100°F. Please note that an increase in liquid temperature will substantially decrease the specific gravity rating. Also, certain chemicals have environmental stress cracking agents in them so higher specific gravity tanks are needed to compensate even though the weight of the chemical may be lower. Please call Rotoplas at 1(800) 985-3417 to determine which tank design is best suited for the chemical application.

We recommend that you use a flex coupling or hose between the tank and the pump. Please ensure that the flex coupling or hose has a sufficient movement capability. Straight-line hose placement will not allow sufficient movement. This will provide more flexibility in the fitting area as the tank expands and contracts during filling and emptying. This will prolong the life of your purchase with this easy to install connection.

The hoops should be tightened to the point of full tank contact, but not to the point of causing tank distortion. The holes used to mount the hoop should be positioned close to the tank to allow full contact at the bottom of the leg and hoop contact point.

Contact your local dealer, which you can find using the dealer map at Our dealers carry a complete line of replacement parts to meet your needs.

There are many variables that can have an effect on the life of a polyethylene tank, such as the type of material being stored in the tank, its concentration and temperature. The temperature of the application can be a factor, especially if the tank design is not based upon the temperature of the application. Some applications may permeate the polyethylene at elevated temperatures. Some chemicals will have long term effects on the polyethylene and may require special considerations.

A visual inspection of your tank should be made each time you fill it. This is to ensure that there are no obvious outside defects since the last time the tank was in service.

Rotoplas tanks have a broad range of chemical resistance to both Agricultural and Industrial chemicals. For Industrial Chemicals refer to the Rotoplas Chemical Resistance Recommendation Chart or contact the chemical supplier to see if their product is compatible with high-density linear polyethylene (HDLPE) or cross-linked polyethylene (XLPE). If they cannot answer your question, call Rotoplas at 1(800) 985-3417 and we will be happy to research it for you. Please, try to have as much information available as possible such as the temperature of the product, the percent concentration of product (Ex: Sodium Hypo chlorite, 15%) etc.

We use a high-density polyethylene resin that provides outstanding environmental stress crack resistance. The resin is UV stabilized but by keeping the tank sheltered or indoors you will prolong the life of your tank.

The number one reason for tank failures is due to improper installation. It is important to follow the provided guidelines for use & installation. Having flexible connections that compensate for the expansion and contraction of the tank will extend the life of the tank.

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