OhMyCalc

Grease Trap Calculator

Calculate the required grease trap size and GPM rating for a commercial kitchen based on fixtures and flow rate.

How to Use the Grease Trap Calculator

  1. Enter the number of sinks.
  2. Select whether a dishwasher is present.
  3. Enter the flow rate per fixture in L/min.
  4. Click Calculate for trap size and GPM rating.

Casos de Uso

Fórmula

Flow = sinks × flow_rate + dishwasher × 2×flow. Trap size = total_flow × 2 (2-min retention). GPM = flow / 3.785.

Perguntas Frequentes

What is a grease trap?
A grease trap intercepts fats, oils, and grease (FOG) from kitchen wastewater before it enters the sewer.
How often should a grease trap be cleaned?
Typically every 1–3 months depending on kitchen volume and local regulations.
What is the 2-minute retention time?
Grease traps are sized to hold 2 minutes of peak flow, allowing grease to separate and float.