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Understanding Design Standards & Our Tanks

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At Peabody, we do much of our design and production processes in-house, including our own tooling and rotational plastic molding, which we put through our internal rigorous testing protocols, so we ensure quality at every step of the process. But that is just the beginning. Our tanks are certified and rated by some of the largest governing bodies and standards in North America.

Product certifications might seem like an alphabet soup of acronyms and labels, but they are a very important indicator that a product has been tested to government or other third-party standards and regulations. What does that mean for our customers who buy our certified tanks? It’s an assurance of safety, reliability and quality from both a design and manufacturing perspective.


ProChem® Potable Water Tanks

Our ProChem® Tanks and Gemini Dual Containment® Tanks made from Linear Polyethylene (LPE) are NSF/ANSI/CAN 61 Certified.

NSF is one of the most respected independent certification organizations in public health and safety across the globe. Having the NSF mark lets consumers, distributors, suppliers and regulators know that our tanks have been rigorously tested to comply with all standard requirements.

NSF 61 is the only American National Standard addressing the human health effects of drinking water system components. It is a performance-based standard that evaluates the amount of contaminants that leach from our tanks into drinking water, rather than setting prescriptive limits on content.

The NSF certification process can be long and costly, but it’s part of our commitment to the industry and to our customers. Though the process is product-specific and can get quite technical, generally, here is a summary of the seven steps:

  1. Application and information submission
  2. Product evaluation
  3. Product testing in lab
  4. Manufacturing facility inspection, production confirmation and product sampling
  5. Test results review and acceptance
  6. Contract signed and products listed
  7. Annual plant inspection and retesting

ASTM D 1998 Standard

Gemini Dual Containment Plus

Gemini PLUS

Our Gemini®, Gemini® PLUS 1300 and Prochem® Tanks in LPE, HDPE, XLPE, PPL or PVDF construction are available ASTM D-1998 rated if desired.

American Society for Testing and Materials, or ASTM has designed and set over 12,800 standards that help improve lives and enhance performance and help consumers have confidence in the products they buy and use. That includes ASTM D 1998, a set of standards for cross-linkable polyethylene (XLPE) and non-cross linkable polyethylene (HDPE) polyethylene vertical tanks over 500 gallons.

ASTM D 1998 defines minimum wall thicknesses for these tanks based on several criteria like height, outside diameter, and specific gravity rating. To comply with the standards, the tanks must go through a series of tests that check:

  • Wall thickness test
  • Impact Test
  • Structural integrity test

Additionally, there is a test for cross-linked polyethylene (XLPE) tanks to measure the chemical makeup of the tank materials.


Gemini Dual Containment

Gemini Dual Containment® Tanks

Peabody’s Gemini Dual Containment® Tanks meet or exceed secondary containment requirements under the EPA’s 49 CFR Regulations.

The Environmental Protection Agency, OSHA, and the Department of Transportation provide regulatory and enforcement functions for laws promulgated by the U.S. Congress that are designed to protect the environment from contamination and reduce risks to human health and worker safety. They have specific requirements for hazardous chemical safe storage compliance. These regulations are codified in the Code of Federal Regulations: 40 CFR Protection of the Environment, 29 CFR Labor, and 49 CFR Transportation, respectively.

FDA Approved

Our ProChem® Potable Water Tanks are also FDA approved. Though the FDA doesn’t approve equipment used in food processing, they have created a set of requirements that equipment used in food and beverage storage must meet.

Work with us today to build your quality, safe and compliant tank!

How to Select a Polyethylene Chemical Storage Tank Based on Shape

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When choosing a polyethylene chemical storage tank, there are several key factors to consider; the application, desired capacity, purpose (mixing or storing), double-wall or single-wall, and where it will be located, just to name a few. But there is another consideration in purchasing a tank that might not get the full deliberation it deserves; Its shape.

The different tank shapes are generally rectangle/square, cylindrical and conical, and all offer some pros and cons depending upon your application. Peabody Engineering’s Gemini Dual Containment® tanks are available in both square and cylindrical shapes. 

Below are some general guidelines in selecting the right tank for your application. 


Cylindrical tanks are the most commonly used tanks in a wide variety of industries including agricultural, water storage, chemical, and water treatment applications.  


  • Cost-effective choice for bulk storage.
  • Excellent hoop strength with no stress points.


  • More difficult to install fittings and piping manifolds due to the curved sidewall
  • More wasted space in an environment with corners.

Square or Rectangular

Square or rectangular tanks are more popular in some applications than cylindrical tanks but can be used in an array of industries and applications that one may not consider at first glance.


  • Allows for maximum use of space with a compact footprint as compared to cylindrical tanks.
  • Flat sides allow for ease in plumbing and piping design.
  • Less expensive to ship and transport than cylindrical tanks.


  • Increased sidewall head pressure from the liquid being stored on large flat surfaces.
  • Limited size range available.
  • Generally more costly than cylindrical tanks.

Peabody Cone BottomCone bottom

Cone bottom tanks are well-suited in applications where 100% drainage of the tank is necessary like the food, cosmetics, or pharmaceutical industries.


  • Easier to drain and clean between batches.
  • Reduces sediment collection at the bottom.
  • Ideal for mixing applications.


  • Requires a stand and hardware.
  • More costly than other tank configurations.
  • Reduced volume per cubic foot due to cone configuration.

All three styles of tanks have their advantages, the choice you make all depends upon your specific application, and what your budget for the project will be.

Our ProChem® tanks offer all three styles in single wall configurations. 

Our Gemini Dual Containment® cylindrical tanks range in sizes from 15 gallons to 500 gallons.

Our Gemini Dual Containment® square tanks are available in sizes 5 gallons to 175 gallons and allow for a larger capacity in limited spaces — 22% more capacity than cylindrical tanks of the same size.

Learn More About Our New Build Your Tank Quote Tool

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Build Your Tank Quote Tool Walkthrough

Whether it’s an aggressive application that requires a secondary tank for caustic products, food processing that needs an NSF Listed FDA High-Density Linear Polyethylene single-walled tank, or a Linear Polyethylene solution for storing and dispensing agricultural chemicals, it’s easy to see why not all commercial storage tank solutions are one-size-fits-all. When it comes to purchasing an industrial storage tank, we know it is an important investment and a process that all starts with identifying your unique needs. That’s why we’ve created our online Build Your Tank Quote tool to help us gather the upfront information we need to help you take that first step in purchasing your new tank.

Our Build Your Tank Quote tool takes the complex and makes it simple so you can find the right storage tank to meet your business’ needs. It helps you get a more accurate quote, quicker quoting timelines, and a better customer experience.

The tool is simple, intuitive, and very user-friendly as it walks you through a quick survey. Let’s take a look at how it works:

Step 1. Select the type of tank you are looking for.

What type of tank do you need? Choose between our ProChem® Process Chemical Tanks that are designed for industrial process chemical applications where a single-walled design is desired; our Gemini Dual Containment® Tanks, also known as Double Wall Tanks, which are rated for a wide range of chemical applications; or our DCS Double Containment Tanks and single-walled engineered tanks that are ideal for a wide range of applications from food processing and semiconductor to agricultural and heavy duty industrial chemical storage.

Step 2. Choose the configuration you need.

The available configurations will differ based on the type of tank you need.

If you selected the ProChem® Process Chemical Tank from Step 1, your configuration options are the ProChem Process Chemical, ProChem Open Top, or ProChem other styles for a more customized tank.  

If you selected the Gemini Dual Containment® tank from Step 1, you choose between a cylindrical or square tank.

If you selected the Double Containment and single-walled engineered tanks, you have the single or dual wall options.

Step 3. Fill in the product specifics.

Next, we’ll need some specifics about the product you’ll be storing. Some of those particulars, depending on the type of tank you selected in Step 1, include the number of gallons being stored, the type of product being stored, and the temperature.

If you select the Single or Dual Walled Engineered Tank from Step 1, the tool will also ask you to include any fittings or accessories you may need. Peabody Engineering offers a variety of standard tank accessories like level indicators, funnels, lids, suction tubes, and heating blanket systems.

Step 4. Submit!

Now that we have all the details we need to get you an accurate, quick quote, just fill in the form with your contact information and any other details you would like us to know about the tank you are looking for and we’ll get back to you with any further questions or a quote, with absolutely no commitment required.

Let us help you design a durable, industrial-grade tank today. Access the Build Your Tank Quote tool to get started. 

Make the new PCS-PLUS 4 Pump Enclosure Part of Your Chemical Containment Plan

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Are you prepared for spills, overflows, and leaks? Properly containing your chemicals in case of a container failure is imperative to protecting your employees from injury and reducing the environmental contamination. Not to mention, EPA compliance. Finding the right secondary containment product is the first best step to mitigating risks.

Peabody Engineering’s new PCS-PLUS 4 pump containment enclosure is designed to safely contain your pumps and equipment manifold systems. Its large footprint—36” x 48” base dimension and 4,000-pound loading capacity—offers the perfect platform for installation of large or multiple pumps, sampling stations, controllers, piping manifolds, coupon racks, chemical feed/dispensing systems, drums and more.

The PCS-PLUS 4 provides a safe, secure, weatherproof, and lockable cabinet. The Polyethylene, corrosion-resistant material allows for wide chemical compatibility, and for an additional cost, you can add on a security bolt kit to prevent unauthorized access.

Here are some other important features and benefits:

  • 66 Gallon Containment Capacity with optional drain for overflows – Allows for EPA-Compliant storage of up to (2) 55-gallon capacity tanks or drums.
  • Sturdy back wall is designed to “add” Unistrut support systems, for mounting pipe and other accessories. Unistrut supports are available in various materials of construction as an option.
  • Optional Fans, Heating, and Air-Conditioning modules available for ultimate climate control.
  • Walls designed for installation of bulkhead fittings for through-hole piping and electrical process connections
  • Great for secure storage of chemicals or other supplies in remote locations, treatment facilities, warehouses, or construction sites.
  • Large swing-open doors with windows and liftable top hatch for easy access for installation and servicing.
  • Designed to mount multiple pumps in one safe, secure location
  • Lockable doors keep your equipment safe and secure. 
  • Forkliftable base with molded inserts for anchoring in place.
  • Standard internal grating to elevate equipment above containment sump.
  • Made of durable rotational molded polyethylene – never rusts or corrodes.
  • UV-Resistant for up to a 20-year life in outdoor installations, designed to keep rain and moisture out.
  • Temperature range from -50°F to 140°F.
  • Available in custom colors with private branding options.
  • Highly chemical resistant with a wide range of chemicals and corrosive environments.
  • Proudly manufactured in the USA.

Peabody’s expert staff can help you properly specify your PCS-PLUS 4 configuration to fit your specific application. 

Start building your quote today.

Essential Critical Infrastructure Manufacturer Stays Open During COVID-19 Pandemic

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Essential Critical Infrastructure Manufacturer - Roto Molding Peabody Tanks

Peabody Engineering as a manufacturer of tanks used for disinfectants, Sanitation, Hospitals, water treatment and agriculture, as well as a manufacturer of telecommunications infrastructure equipment is considered an Essential Critical Infrastructure Manufacturer and therefore will STAY OPEN during this challenging period to do our part in protecting America’s well-being, health, safety and our vital infrastructure.

We stand ready to support President Trump and his COVID Response team to help keep America moving forward to defeat the invisible enemy we are now facing. With God’s help, we believe that we as a nation MUST pull together to face this crisis. We believe that just like many times in the past, AMERICA will prevail during this defining moment in history.

On behalf of the entire team at Peabody, we appreciate your continued confidence and support as we strive to serve all our supplier/business partners. As a Essential Critical Infrastructure Manufacturer – We are in this together!

Click to download information on “Guidance on the Essential Critical Infrastructure Workforce: Ensuring Community and National Resilience in COVID-19 Response” which is from U.S. Department of Homeland Security – CISA (Cybersecurity & Infrastructure Security Agency).

Identifying Critical Infrastructure During COVID-19

COVID-19 Pandemic and What Peabody is Doing

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Peabody Engineering Building

Peabody Engineering appreciates your continued confidence and support as we strive to go beyond boundaries in exceeding your expectations as a supplier/business partner. In light of the current situation with the COVID-19 pandemic, we at Peabody are striving to fully support President Trump in doing our part in mitigating this deadly virus by making some short term changes in the way we conduct our business.

We will remain open during our regular operating hours, but have suspended all travel and face to face meetings from today through April 6th, 2020 (for now). This may be extended based upon what we hear from the experts as we as a nation pull together to get through this potential health crisis. We also are not accepting any visitors to our facility during this period to reduce the risk of infection of our valued employees. You are important to us and we will continue to produce and ship our products to the extent we are able in the current situation. We anticipate that we may have staffing shortages due to quarantines, school closures and possible employee illnesses, but will do our best to ship your products as quickly as possible.

We realize this is a short term issue and hope to get back to “normal” as soon as possible, but we feel it’s important for our government and the private sector to work together to overcome this challenge. We appreciate your understanding, cooperation and support during this unprecedented season and stand ready to assist you in meeting your needs however we can. If you have any specific requirements, please reach out to us at your convenience. In the meantime, please join us in praying for our nation and the world in remaining calm, embracing a spirit of charity to help others in need, avoiding illness and finding a cure for this COVID-19 pandemic very soon.

On behalf of the entire team at Peabody, thanks again for your understanding and support.

Peabody Engineering Meeting

The Importance of NSF 61 Certification

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Does your drinking water storage tank meet NSF 61 requirements? Whether for operations in agriculture, vineyards, farm, fire protection, or water treatment, water safety is paramount in the production of potable water containment products. NSF 61 addresses those concerns.

Developed in 1988 by NSF International, an American product testing, inspection, and certification organization, NSF 61 establishes minimum requirements for the control of potential adverse human health effects from products that come in contact with potable drinking water or products that support the production of potable water. For manufacturers of drinking water containment products, NSF 61 is a critical certification to have. And not just for liquid containment manufacturers. NSF 61 includes all components of a drinking water system, including pipes, faucets, gaskets, coatings, meters, filers, and joining and sealing materials.

Getting certified takes some time. Material samples are analyzed for formulation, trace materials, and toxicology. Leaching tests are also performed over time to determine whether any chemicals will seep into the containers. Additionally, the certifying agency performs an audit of the manufacturing facility to confirm that the procedures and materials reflect those listed during the application process.  

Since 1952, Peabody Engineering has been designing, producing, and distributing commercial storage tank solutions to customers all over the globe. As commercial/Industrial liquid containment (Tank) manufacturing leaders, we work hard to stay ahead of the demands of the industry, including standards like NSF 61.   

We have designed a line of potable water and chemical tanks that are certified drinking water system components for health effects by NSF/ANSI/CAN 61.    

Gemini Dual Containment® Tanks for potable water and water treatment chemicals with capacities from 40 gallons to 1300 gallons are manufactured using XLPE, and Gemini® Tanks for potable water and water treatment chemicals from 5 to 1300 gallons are manufactured with LDPE and HDPE. Both are certified by NSF 61. Offered in a variety of tank sizes in both round and square configurations, the Gemini® Tanks, with standard features like the pump mounting platform, overflow dikes, vented lid, and threaded fittings all included offer years of trouble-free and maintenance-free service.

Our ProChem® Potable Water and chemical Tank models with capacities from 5 to 1500 gallons are manufactured with LDPE or HDPE, and models from 40 to 1500 gallons are manufactured with XLPE. All are NSF 61 certified. ProChem® Potable Water and chemical Tanks include an integrally molded pump mounting platform on top and standard process fittings for fill and discharge of water. Supplied with a large vented access opening and easy to read calibration in liters and gallons, the ProChem® Potable Water and chemical Tank line offer standard features not previously available.

Peabody Engineering is committed to providing safe, quality liquid containment products for drinking water applications. Visit our website to request a quote for an NSF 61 certified potable water and chemical tank solutions today. 

Manufacturing Location in Georgia USA

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Manufacturing Location in Georgia USA

Peabody Engineering is growing with a new Manufacturing Location in Georgia USA! Beginning in Mid-March, we will be manufacturing some of our Gemini Dual Containment® Tanks at a NEW Eastern United States Manufacturing Location in Union Point, GA. This will help our customers East of the Mississippi with shorter lead times and more competitive freight costs, with the same high quality Peabody Gemini Tanks.

We will initially offer the following sizes and styles in Georgia:

Gemini² Rectangular Dual Containment® Chemical Feed Tanks

  • Gemini Square Tanks Assorted Sizes
    • G10²
    • G20²
    • G40²
    • G70²
    • G120²



Gemini Cylindrical Dual Containment® Chemical Feed Tanks
Gemini Cylindrical Tanks Assorted Sizes

  • G40 Flat Top
  • G62 Flat Top


As demand for other sizes and styles increase, we will add additional Peabody Products from our Georgia location.

Please contact customer service for more information on availability from both locations and also ask about our freight incentive program for orders of ½ truckload and larger.

Thank-you for your continued support of Peabody Engineering and Gemini Dual Containment® Tanks.

Level Gauge Manual Float Type

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Level Gauge Manual Float Type

Level Gauge Manual Float TypeKeep track of your tank levels with our Level Gauge Manual Float Type. All Gemini Float Style Level Gauges have 2” MPT threads or our NEW *¾”/1” MPT, for easy installation into std. Gemini top connections, providing instant level indication on our double walled tanks. Available in your choice of Stainless Steel or PVDF for more aggressive chemical applications.

Level listed in 1/8, 1/4, 3/8, 1/2, 5/8, 3/4 and Full in easy to read format.

Custom sizes also available.

*3/4” gauge comes installed into a 1” x ¾” MPT poly bushing.

We get a lot of customers asking how to install our Level Gauges into our Gemini Dual Containment® Tanks and our Gemin2 Dual Containment Tanks. Watch this informative Peabody Engineering How To Video and if you still have questions call us at (951) 734-7711.

Looking for a Spec Sheet on this? Simply click below for a PDF.

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Handling Chemicals Responsibly

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Handling Chemicals Responsibly is More Important Now Than Ever Before.

Handling Chemicals Responsibly“The need for concentrated chemicals in water quality and wastewater treatment applications is a fact of life. Hazardous, toxic chemicals, such as Sodium Hypochlorite, Chlorine Dioxide, Sulfuric Acid, Amines and Caustics are in use throughout the country in unlikely places where potential exposure to the general public is at risk. Places like hospitals, convention centers, amusement parks, universities and even hotels and office buildings require storage and dispensation of these concentrated and hazardous chemicals to treat recirculating water and effluent of mechanical equipment like boilers, cooling towers, HVAC systems and waste streams, to insure public safety in preserving air and water quality and elimination of toxic and biological exposure in our waste streams and the environment at large.”

The above excerpt is from an Editorial Article on a subject that we are well versed on. Chemical storage and workplace safety are factors we take into consideration when we make all of our Peabody Engineering Products.

Some key highlights of the article include:

  • Environmental contamination
  • Testing and remediation of the site
  • Monitoring and testing for months or even years after the spill
  • Reporting to agencies like EPA
  • Tank configuration
  • Materials of Construction
  • Operating pressure
  • Secondary containment recommended to protect from primary tank failure
  • Other considerations

You can read the full published article online at

Additionally you can download a PDF of the article to keep handy as reference material.