Water and Wastewater Treatment

Tanks Built to Last

Your work is crucial to everyday life. And choosing the right storage tank makes or breaks your ability to do the job right. That’s why it’s important that the quality of storage tanks used in water treatment industries match the standard of your practices.

At Assmann, we build high-quality polyethylene tanks that last. Our tanks have uniform wall-thickness, which is ideal for industries that require long-lasting and trustworthy storage solutions. Tanks with uniform wall-thickness are less prone to cracks, tears, and unexpected bursts. That’s what makes Assmann tanks the most reliable on the market.

See how Assmann can provide the right solution for your water treatment or wastewater management needs.

Pentair Plagued by Filthy Tanks

First impressions are everything. Learn about how Assmann’s ability to deliver a pristine product to our clients enabled one business to cut lead times and increase margins.

The Assmann Difference

We at Assmann Corporation are constantly finding ways to increase efficiency in our process. But we’ll never abandon successful methods for any cost-cutting measure that would compromise the quality we’re known for. That means we’ll always provide a tank you can trust, in a timeframe that works for your needs.

Municipal Water Treatment

When storing resources for a town or city, reliability can’t be compromised. At Assmann, we provide long-lasting storage solutions, fit for municipal water treatment needs. While other tanks might crack or burst due to inconsistencies in wall-thickness, we construct our tanks with a uniform wall thickness and gradually air cool them to ensure an even cure of the plastic. That means an Assmann tank will last longer than those from our competitors, so you can keep failure far out of mind.

Industrial Water Treatment

For water treatment storage, cleanliness and reliability are crucial for successful storage solutions. Before we begin the molding process, we make sure each mold is clean and free of rust, dust, or debris. Then, we use virgin resins and never add re-grind. That means each tank is clean and durable, making an effective storage tank for water treatment needs.

Suggested Tanks for Water and Wastewater Management

Vertical Storage Tanks

Assmann vertical storage tanks are more corrosion and chemical resistant than fiberglass, stainless, or mild steel. Vertical storage tanks are ideal for space-saving uses in confined areas.

Full-Drain Outlet Tanks

At Assmann, we offer a full drain outlet assembly (FDO). This outlet provides the ability to fully drain your tank without the need for mechanically installed nozzles.

Conical Bottom Tanks

Conical bottom tanks are available in seamless molded one-piece units from either virgin high density crosslink or FDA-compliant linear polyethylene.

Spec Sheets

Are you interested in an Assmann tank, but aren’t sure where to start? Browse our spec sheets to see which Assmann tanks solve your storage challenges. Get access to tank design, dimensions, requirements, and more. For ease of use, we provide our spec sheets as MS Word files.


See the manufacturing specifications for our vertical storage tanks.


See the manufacturing specifications for our double wall vertical storage tanks.


See the manufacturing specifications for our conical bottom storage tanks.

See how Assmann can help meet your needs

We can provide a solution for any tank, even custom builds.