Grease Interceptor Sizing:

The sizing criteria outlined below is a Guide Only. WaterStore Poly Tanks will specify the sizing requirements at the time of application.

Sizing Grease Interceptors for Commercial Customers differs from Industrial Customers. Below is a guide to sizing grease interceptors for a commercial customer. Follow Steps 1 to 3 to determine the grease interceptor size.

Step 1:

Determine the grease interceptor size based on the seating capacity. 

Step 2:

Determine the grease interceptor size based on the fixtures in the food preparation/ kitchen areas.

Step 3:

The larger of the two grease interceptor sizes determined from step 1 and 2 should be considered as the estimated size. If the size of the grease interceptor determined in step 2 is larger than step 1 then the next standard size in grease interceptor (refer to table in step 1) should be used e.g. if the total ‘fixtures’ equals 850L then an 1,000 litre grease interceptor would be required.

Note: The minimum size grease interceptor for chicken shop whether it be BBQ, charcoal or fresh chicken shall be 1,000 litres.

Industrial Customers:

The size of the grease interceptor is determined by the maximum hourly flow rate. If the flow rate falls between the standard size grease interceptor, indicated below, then the next standard size grease interceptor shall be used, e.g. if the maximum hourly flow rate expected through the grease interceptor equals 900/L hour then an 1,000 litre grease interceptor would be required.

See FAQ "Installation Requirements" for more information