Assmann Polyethylene Tanks are ISO 9001: 2015 & NSF Certified

ISO 9001:2015 Certification

Assmann polyethylene tanks are ISO 9001:2015 certified.

Assmann Corporation of America has been ISO Certified since 1994. An ISO certificate is not a once-and-for-all award, but must be renewed at regular intervals recommended by the certification body, usually around three years. Two types of auditing are required to become registered to the standard. Auditing by an external certification body and audits by internal staff trained for this process. By regular auditing, we are required to constantly improve our systems. View the certificate.

ISO audits engineering and manufacturing processes for effectiveness and continuous improvement. This monitoring helps Assmann Corporation set achievable goals, track our goals and best of all complete them. Assmann Corporation employee's commitment to the ISO program is second to none; our entire staff monitors each individual stage of our manufacturing process for errors and possibilities for improvement.

ISO forces Assmann Corporation to place the concept of process management front and center. "Process management" is the monitoring and optimizing of a company's tasks and activities, instead of just inspecting the final product. By regulating and monitoring our process, we continue to improve our products. This constant review makes us proactive rather than reactive to process design flaws and virtually eliminates poor quality products from ever being supplied.

What does this mean to you? Assmann tanks are designed and manufactured under strict quality control standards. Each tank we manufacture has its own quality control and routing card that links the product back to date of manufacture, raw material lot numbers, and processing times. This complete traceability is critical especially when governing laws are being created daily regarding bulk chemical storage.

Assmann Corporation Scope

Assmann Corporation of America located at 300 N Taylor Rd. / 310 N Taylor Rd. Garrett, Indiana 46738 and Assmann Southwest, Inc. located at 1505 S Central St. Marshall, Texas 75672 provides Design and Manufacturing of Rotational Molded Polyethylene Bulk Storage Tanks and Custom Molded Products.

Assmann Corporation Exclusion

8.5.5 Post-delivery activities.

Assmann Corporation only covers warranty and workmanship.

NSF Certification

  • Assmann Corporation's Crosslink Tanks are approved for chemical storage by NSF!
  • Schulink XL-350 Crosslink Resin
  • Assmann is the FIRST Crosslink Tank approved by NSF for chemical storage!
Assmann polyethylene tanks are NSF certified.

NSF is an independent testing company that requires Assmann Corporation of America to comply with strict standards. These standards require extensive product testing and material analysis. NSF undertakes a complete evaluation of our product development before we can meet their certification.

NSF / ANSI 61 program is responsible for the certification of drinking water treatment chemicals and drinking water system components to ensure that these products do not contribute contaminants to drinking water that could cause adverse health effects.

Assmann Corporation's crosslink polyethylene tanks have been certified by NSF International to ANSI 61 standards for chemical storage. Assmann's unique crosslink resin is certified for many chemical applications. Sodium Hypochlorite, Sulfuric Acid, and Sodium Hydroxide are within the list of chemicals our tanks can be used to store. For a complete list of certified chemicals, visit

In addition to our crosslink tanks for chemical storage, Assmann Corporation's linear polyethylene tanks have been certified by NSF International to ANSI 61 standards for potable water. With both crosslink and linear polyethylene certifications Assmann Corporation can be your first source for both potable water & chemical storage for water treatment.

Our certification includes tank models ranging in size from 20 through 12,000 gallons.

Assmann Corporation of America
300 North Taylor Road, Garrett, IN 46738 USA
888-357-3181 or 260-357-3181
Assmann products are ISO 9001:2015 certified and approved for chemical storage by NSF.
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