Blog

Discover why the 30-minute retention time rule for grease interceptors falls short, and how tested, engineered solutions set the real standard.

We talk a lot about hydromechanical grease interceptors… but what does that even mean? This blog explores the origin of the term hydromechanical, how these units work and why they are more efficient than untested gravity grease interceptors.

Effluent concentration limits are set by jurisdictions to monitor grease interceptor compliance. But there are two major problems with this approach.

The 25% rule limits grease interceptors to 25% combined grease and solids capacity. Modern hydromechanical interceptors (HGIs) hold up to 75% grease, reducing water waste and costs. HGIs outperform outdated systems, highlighting the need for updated standards.

Field inspections show that FOG (fats, oils, and grease) is introduced through every kitchen fixture, however, misconceptions persist about the necessity of routing floor drains, sinks or other fixtures to an interceptor. What is the right answer?

Hydromechanical grease interceptors (HGI) traditionally utilize flow control devices to restrict the incoming flow to the flow rate to which the grease interceptor is certified. Even so, flow control devices haven’t always been used the way they are today.

The ratings of hydromechanical grease interceptors are divided into four types, A thru D, according to the product standard ASME A112.14.3.

ASME and CSA harmonize plumbing standards for hydromechanical grease interceptors, streamlining regulations and benefiting North American manufacturers.

The American Association of State Highway and Transportation Officials (AASHTO) has implemented weight restrictions governing manhole covers within the United States.

Explore plumbing code requirements for grease interceptors, including trap and vent specifications. Learn about AAV usage and the impact of boilerplate drawings. Ensure compliance with local codes.

Each year, open sewer manhole incidents lead to accidents including drowning, entrapment, and exposure to hazardous H2S gas, impacting the public and those in maintenance and food roles.

The new GB-1500 from Schier is the industry's first and only performance-certified 1,500-gallon grease interceptor, offering best-in-class grease capacity achieved by Schier Flow Technology™.