Calculate Grease Trap Size

DISCLAIMER: THIS FORM IS NOT INTENDED TO BE SUBSTITUTED FOR A LICENSED PLUMBER.  IT IS ONLY A REFERENCE AND SHOULD ONLY BE USED AS A GUIDE. ACTUAL SIZE MAY VARY. NOT RESPONSIBLE FOR ERRORS.

Actual sizing should be per chapter 10 of the Florida Building Code 2004 Plumbing, (current edition)

Sizing Formula for Restaurants

S
X
GS
X
(HR/12)
X
LF
=
Effective capacity of grease interceptor in Gallons

S = Number of Seats in dining Area

GS = Gallons of waste per seat (use 25 gallons for restaurants with china dishes and/or automatic dishwasher.  Use 10 gallons for restaurants with paper or baskets and no dishwasher)

HR = Number of hours restaurant is open.

LF = Loading Factor (use 2.00 interstate highway: 2.50 other freeways: 1.25 recreational area: 1.00 main highway: 0.75 other highway)

Other Establishments with Commercial Kitchens

M
X
GM
X
LF
=
Effective capacity of grease interceptor in Gallons

M = Meals prepared per day

GM = Gallons of waste per meal (Use 5 gallons)

LF = Loading Factor (use 1.00 with dishwashing machine and 0.75 without dishwashing machine)

Note: For other than private sewage disposal systems, reduce gallons values by 25 percent.


Updated: 12/07/2020