— High Density Polyethylene

About Delta’s Point of Difference

Learn About Our High Density Polyethylene

With Delta Cooling Tower’s long-standing history as being the technology leading water cooling tower supplier, Delta Cooling Towers has built a solid reputation on creating innovative designs that last longer, save costs and elimintate downtime compared to those offered by other manufacturers. Our new cooling tower technology features engineered plastic cooling towers, consisting of high density polyethylene (HDPE), which allows for an extended lifecycle. Keep reading to learn more about its numerous benefits.


Because of rust and corrosion, metal towers lead to costly maintenance. Expensive process disruptions occur towers have to be repaired or serviced for replacements.


HDPE industrial towers have very minimal maintenance and downtime while improving sustainability, greater energy efficiency, and adding water conservation.


Metal cooling towers have an average of 7 to 15 years before they need to be replaced.

Engineered Plastics

Delta Cooling Towers offer a 20 year warranty and 50 + year expected lifecycle.


Due to environmental factors, metal-clad shells become destructive and corroded, decreasing their lifespan.

Engineered Plastics

Because Delta’s modern towers consist of sturdy, seamless plastic. They are impervious to corrosion from the environment. Durability is significantly longer.


Metal towers can accumulate scale, biologic growth, and particulate deposits. The towers can suffer from corrosion reducing the efficiency by 5% as you cannot aggressively treat the issue.

Engineered Plastics

Our corrosion resistance and efficiency offers immediate savings, and you will continue to save. After all, plastic allows for cooling tower corrosion control.


Industry experts have inspected new softened makeup with metal towers. In fact, they have found more than 50% of the galvanizing had been removed from the tower in less than 30 days which means the efficiency suffers.

Engineered Plastics

The PH levels as well as other chemicals in the water do not affect the cooling tower allowing higher cycles of concentration without causing damage.


Metal designs have increased faculty costs via destruction of expensive equipment, damage to the facility, increased costs for water, chemicals, sewerage, and increased energy use.

Engineered Plastics

Delta Cooling Towers have extremely low water consumption. In fact, the efficiency of our Towers saves you more than 12% of the tower price in operating cost annually compared to other tower manufacturers.


With metal water cooling towers, your towers are at significant risk of Legionella.

Engineered Plastics

Delta’s Anti-Microbial Cooling Tower protects you from having a dangerous Legionella cooling tower, which can prove potentially fatal.

The Delta Approach

With five decades of expertise behind our name, Delta Cooling Towers faithfully puts customers first, hence our longevity in the business. We partner with our customers to strategically assess their cooling tower needs. This coupled with our commitment to innovation, makes Delta Cooling Towers the manufacturer of choice. Our exceptional customer service keeps customers coming back as well as referring us to coworkers and friends in the industry.

Explore a Customer Case Study

Learn How Delta Cooling Towers Improved Life on Campus

Indiana State University Graduates to Advanced Plastic Cooling Towers

In a recent case, Indiana State University (ISU) began installing the engineered plastic cooling towers at its 190-acre main campus located near the center of Terre Haute in west central Indiana. ISU residences, academic centers, labs, recreational and sports facilities are situated in a park-like community that is separate from the rest of the city.

Several new cooling towers manufactured by Delta Cooling Towers, Inc. have been installed or are planned to support the central and satellite chilled water systems that supply the campus’s many academic, student and research facilities.

“Smarter” systems choices
“About two years ago we were nearing the completion of a renovated building that became the College of Education,” says Mark J. Pupilli, ISU Building and Facilities Manager. “Because the capacity at the central chilled water plant had become nearly exhausted, we decided to install a standalone chiller and also allow the building to be connected to the chilled water plant. At the suggestion of one of our suppliers, we looked at the Delta plastic cooling towers.”

Pupilli explains that the Delta line offered many features that he liked, and the fact that they were engineered plastic meant that many maintenance issues could be avoided. He was also impressed with the selection of available models, the product quality, and a long-term (20 years) warranty on the double-walled HDPE shells.

After considering the applicable designs, Pupilli decided to purchase a 550-ton Delta Premier Series tower. Like other Delta designs, the Premier model is relatively light in weight, impervious to UV rays and virtually corrosion-proof.

More recently, ISU received funding to build a satellite chilled water plant to provide some redundancy as well as much needed additional capacity in the central chilled water system. Pupilli went with two four-cell TM Series towers.

Pupilli says the primary maintenance issue with the metal cooling towers was the need to do a lot of coatings and repairs. The main reason for going with the newer, engineered plastic technology was the expectation that those problems would go away. In addition to the coatings problems Pupilli describes, many of the galvanized metal-clad cooling towers require even more expensive repair as well as frequent replacement.

Because of the corrosive nature of water, the chemicals used to treat it, and locations where they are found metal towers will require extensive maintenance and costly repair or replacement bills.

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From our low maintenance design to our manufacturing process to excellent customer service, we're sure you'll be pleased with our superior cooling towers, every step of the way. Get a quote