grease interceptor

Investing in corrosion-resistant fiberglass means cost savings for the long-term

A key element of today’s wastewater systems are grease interceptors that collect fats, oils, and grease (FOG) before wastewater enters the municipal or onsite system. Maintenance-free fiberglass interceptors are not vulnerable to the deterioration that other materials are. The bacteria that generates hydrogen sulfide and sulfuric acid in these units corrodes porous concrete and ultimately leads to product failure.  

Whether a project calls for storage of small or large volumes, Xerxes engineers are ready to custom design a grease interceptor to fit a project’s exact specifications and site requirements. Except for scheduled pump-outs, no ongoing maintenance is required. With lower cost of installation and ownership – and a 30-year limited warranty – the long-term savings are substantial.


Xerxes tanks meet – or exceed – industry standards

  • IAPMO/ANSI Z1001  
  • UPC code 
  • Local and state codes 

Why choose a Xerxes grease interceptor?

  • Designed to be 100% watertight 
  • Capacities from 600 to 60,000 gallons 
  • Easy and complete cleaning and pump out with tank’s smooth, rounded walls 
  • Easy installation and maintenance  
  • Single-wall and double-wall models 
  • Designed to withstand H-25 / HS-25 axle loads 
  • 30-year limited warranty 

Success Stories

U of Michigan campus grease interceptor

University Campus - Michigan, US

Replacing concrete with fiberglass is a responsible environmental choice ​

Michigan State University (MSU) chose our corrosion-resistant fiberglass tank to replace the failing, corroded concrete grease interceptor they’d installed previously in a campus dining hall. In collaboration with MSU’s mechanical team, Xerxes designed a system with fewer elbows – and without any 90-degree elbows. Taken together, this reduces the potential for food and grease to plug up the system, a common occurrence at foodservice facilities. Our lightweight tank was easy to ship and install, and needs fewer pump-outs, providing another cost savings. Installing a Xerxes tank that is designed to protect the environment also fits in with the values of the university, which hauls away the waste to be burned as biofuel. 

Food Processing - Virginia, US

Smooth walls and cylindrical tank make for easy clean out

Xerxes provided a 7,000-gallon grease interceptor to a seafoodprocessing facility in Virginia. To meet the plant’s exact requirements, our engineers designed a grease interceptor with three compartments, separated by baffles and fitted with manways, to allow each compartment to be accessed and cleaned out individually. The cylindrical design and smooth walls of our tank allow for easy clean out of the debris that collects at the bottom of the tank. Because of the corrosive activity that occurs in grease interceptors, the customer knew that corrosion-resistant fiberglass would be the best material for their facility. That, along with the fact that the fiberglass interceptor is lightweight makes for easy shipping, installation and maintenance – all resulting in lower life-cycle costs.  

Michigan university campus