A Better Chemical Storage Solution for Municipal Water Treatment Plants

 It’s common for wastewater treatment plants to rely on cross-linked polyethylene chemical tanks, but many municipal drinking water plants are using inferior linear polyethylene or fiberglass tanks. While the short-term benefits are tempting, using linear polyethylene or fiberglass tanks is like pouring money down the drain. Instead, Poly Processing’s cross-linked polyethylene (XLPE) tanks give you better performance, greater cost-effectiveness and more innovative solutions.


Don’t All Tanks Perform the Same?

XLPE storage tanks play an important role in municipal water treatment. You may not be storing the volume of hazardous chemicals that a wastewater plant uses, but you are containing harsh materials that attack fiberglass and linear polyethylene tanks. These chemicals require a strong, safe storage solution to combat their corrosive properties—but not all tanks are made equal.


Fiberglass storage tanks aren’t one-piece vessels, which means they contain many seams. Each seam is a weak point, creating several opportunities for leaks. Fiberglass tanks can also be handcrafted or hand laid up, which opens up several opportunities for human error. In addition to the quality issues, fiberglass is expensive - and corrosion barriers for aggressive chemicals can increase these costs significantly. All of these challenges mean you need to continually maintain fiberglass tanks and be vigilant for wicking and leaks.

Linear Polyethylene

Because of these issues, many municipal water plants use linear polyethylene tanks instead. But this option isn’t much better. Linear polyethylene is less expensive than fiberglass, but it’s also susceptible to corrosion and requires regular maintenance throughout the reduced useful life of the tank.

Cross-linked Polyethylene

Cross-linked polyethylene meets each of these challenges. Because of its seamless one-piece molded construction, polyethylene storage tanks lack seams where leaks tend to develop. The material is also resistant to corrosion, which means maintenance is practically eliminated throughout the increased useful life of the tank. XLPE tanks are also manufactured by an automated process, eliminating the risk of human error. Due to lower cost of materials and expense of the manufacturing process, Poly’s XLPE storage tanks are lower cost than fiberglass storage tanks.

XLPE Tanks Provide More Value

When calculating the true cost of a chemical storage tank, consider the cost for the useful life of the product - not merely the upfront cost. That’s where Poly Processing shines. Our tanks are designed to give you the most useful life out of your chemical storage system.

One of our core values is cost-effectiveness, and that comes out in our tanks’ superior warranties and life expectancies. Our tanks have a much longer life expectancy than other materials. So, while our cross-linked tanks have a higher upfront cost than some linear polyethylene tanks, the cost over the useful life of the tank is much less.

Our XLPE chemical tanks have a five-year full warranty, with a life expectancy of 15-20 years in most cases. A linear tank’s life expectancy is typically 4-6 years. You’ll get three times as much life out of a cross-linked polyethylene tank for only a slightly higher initial cost.

When it comes to fiberglass, our tanks cost about half the price of a fiberglass tank. They also have a longer warranty, for an even greater cost effectiveness.

Innovative Containment for Your Needs

Poly Processing’s chemical storage tanks are designed to meet the storage needs of municipal water plants. Our innovative solutions help your personnel do their job more effectively, and more safely.

Full-Drain Tanks

The chemicals used in water treatment pose risks of contamination or harm to humans in the eventIMFO 1.jpg of leaks or spills. Secondary containment is a must. If concrete secondary containment is already in place, Poly Processing’s IMFO tank or Sloped Bottom IMFO tank are the perfect water treatment chemical storage solutions.The IMFO offers superior tank strength in a one-piece molded tank, with the flange molded into the lowest part of the tank.

Poly Processing also has a sloped-bottom version of the IMFO tank, which we recommend for heavier materials and unparalleled full drainage. The additional gravity feed allows these heavier substances to drain more easily, and that makes cleaning it even simpler because there’s no need for a confined-space entry.

Double-Wall Containment

If you don’t have adequate secondary containment, our innovative SAFE-Tank System provides an unmatched safe chemical storage solution for water treatment. SAFE-Tank is a tank within a tank that keeps contaminants from entering the interstitial area. The system provides 110% containment in case of a leak, and it takes up a smaller footprint than other double containment systems.

Additional Antioxidant Protection

For additional antioxidant protection, IMFO tanks and SAFE-Tanks are available with our OR-1000™ system. Poly Processing’s exclusive OR-1000 system addresses the aggressive oxidation effects of the most oxidative chemicals by adding an additional chemical barrier between the tank wall and the chemical.

OR-1000’s engineered inner surface is made of medium-density polyethylene for oxidation resistance, and its outer surface is made of XLPE for superior strength. The two surfaces are molecularly bound together during the manufacturing process, creating a truly seamless bond between the XLPE and the inner surface.

The Containment System for Municipal Water Plants

When it comes to protecting your equipment, your personnel, and your chemical supplies, cross-linked polyethylene tank systems are second to none. Not only are they the smartest financial investment, they outperform other tank options for reliability and longevity.

For specific questions about a custom water treatment chemical storage tank system, contact a Poly Processing chemical storage tank specialist today.

Topics: Tank Design and Materials