Equipment · Tool
Two questions, one horsepower.
Waste volume and waste type in, disposer class out — InSinkErator's published sizing matrix, made answerable in ten seconds.
Your disposer class
Sizing is the easy half; the sink collar, water flow controls, and syphon breaker are the half that gets installs rejected. Your dealer's plumber will thank you for settling the class first.
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Asked every week.
What horsepower disposer does a restaurant need?
Per InSinkErator's published sizing chart: light-duty operations run ½ to ¾ HP, full-service restaurants typically ¾ to 2 HP, and buffets, cafeterias, and institutions 3 to 10 HP — with waste composition pushing you up a tier when scrap runs heavy on meat and bone.
Can a disposer be too big?
The manufacturer's own rule is the opposite worry: never downsize. An oversized disposer simply lasts; an undersized one jams, overheats, and dies young.
A tool gets you close. A person gets it right.
Every number here is a starting point, not a quote. Your Zink specialist runs these questions for a living — and checking your math costs you nothing.