If you manufacture, sell, or distribute water treatment or distribution products in North America, your products in most cases must comply with NSF/ANSI 61. NSF/ANSI 61 sets criteria for water system components to protect health standards. It’s important that all components in water treatment meet the correct standards to ensure dangerous toxins aren’t leached.

However, there is confusion among customers about NSF/ANSI 61 and what it covers. Let’s explore what NSF/ANSI 61 covers and how to make sure your chemical storage tank system meets the necessary requirements.

On the surface, polyethylene storage tanks might look pretty similar. It’s tough to tell a more robust tank that has been well designed and constructed from a cheap, inferior one. Over the years, we've found that many customers are unaware of the standard for polyethylene tank construction based upon resin properties and testing or they simply assume all tank manufacturers follow the ASTM D 1998 standard.

The ASTM D-1998 standard is a voluntary standard that differentiates the manufacturers that meet it vs. the ones that don't. However, as in any standard there is some subjectivity to how each manufacturer interprets the ASTM guidelines. Just meeting the standard isn't everything though; it's not an all inclusive list. The standard should be looked at as one in many items in a checklist when picking the proper tank and manufacturer for your application.

How do you know by looking at a chemical storage tank how well it’s constructed? There’s a big difference between a well-designed, properly constructed tank and an inexpensive one that doesn’t meet structural requirements. But it takes more than the naked eye to spot critical flaws.

We get a lot of questions about the standard testing that is done at our facility. Vertical tanks larger than 500 gallons are extensively tested to ensure that they meet ASTM standards. Per customers’ requests, we offer additional testing on our chemical storage tank systems.

In this blog we look at how NSF/ANSI 61 certification differs by state and how that impacts tanks and drinking water components throughout the United States. 

Regardless of your geographic location, Poly Processing is committed to ensuring that our polyethylene storage tank systems are NSF/ANSI 61 certified. So no matter where you are, we can meet your state’s regulations.

In this blog we discuss the different certification tests that NSF performs for chemical storage tanks as well as potable water storage tanks.  

Poly Processing is committed to ensuring that our polyethylene chemical storage systems are NSF/ANSI 61 certified. In the first part of our series on NSF, we looked at NSF/ANSI 61 and what it meant to be certified. Some customers may be confused about whether their tanks or tank systems are certified to NSF/ANSI 61 and which certification is valid for their tank.

In this blog we discuss the basics of NSF/ANSI 61 for chemical and potable water tanks.  

Each component of a public water treatment system is subjected to meeting certain criteria. The most important standard may be NSF/ANSI 61 certification. However, there's confusion among customers as to what it is and what it covers.

Let's look at NSF/ANSI 61 and detail how to ensure chemical storage tanks meet the proper requirements.

The American Society for Testing and Materials (ASTM) has four tests in place for cross-linked polyethylene tanks. All are intended to ensure that the tank’s materials and composition meet the safety standards necessary for operational chemical storage tanks.

It’s hard to judge, with the naked eye, how a polyethylene tank is constructed. On the surface, a tank is just a tank. However, there is a big difference between a well-designed, properly constructed tank and a cheap one that doesn’t meet structural requirements.

Storing chemicals and storing water are two very different propositions. While you may save some money up front by using a water tank to store chemicals, in the long run this decision may end up costing you more than you think. There are a few critical reasons why you shouldn’t use water tanks for chemical storage.