One benefit of our units being third-party certified (by NSF to ASME A112.14.3) is we know exactly how much grease our units will hold. The concrete gravity type vault doesn't have this benefit as there is no perfomance testing required and leaves inspectors to apply a general rule as to when the unit is full and in need of being pumped out. Schier's GPSM (grease production sizing method) allows us to fine-tune the sizing based on food type and pumpout interval. If you had a similar size Subway and BBQ restaurant just counting DFUs and seats would basically size them out as the same size interceptor when they would be creating two completely different amounts of grease.
Well, good news. ASPE has adopted the GPSM into the latest handbook. Using this method reduces unnecessary expenses for your client while allowing you to specify a grease interceptor that will meet their needs and function properly.
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