Grease Trap Requirements Article III, Section 15, states: “Grease traps shall be required on sewers into which significant amounts of animal or vegetable fat, oil or grease may be discharged so that a discharge concentration does not exceed 100 milligrams per liter....
How does a grease trap operate?
In the most basic terms, a grease trap works by slowing down the flow of warm/hot greasy water and allowing it to cool. As the water cools, the grease and oil in the water separate out and float to the top of the trap. The cooler water - minus the grease - continues to flow down the pipe to the sewer.
What is the difference between a grease trap and a grease interceptor?
Grease traps are much smaller (typically about the size of bread box to a small mini-fridge), while grease interceptors are much larger. Capacity/flow. Grease traps handle flow rates of 10–50 gallons per minute, while grease interceptors accommodate flow rates of more than 50 gallons per minute.Mar 16, 2020
What is gpm on grease trap?
If you operate a restaurant or other commercial facility, you may have wondered "what size grease trap do I need?" Commercial grease traps are sized according to the rate of incoming flow, in gallons per minute (GPM). Associated with this incoming flow rate is the trap's capacity.
How do you calculate the GPM of a grease trap?
Determine the flow rate for each sink to be serviced by the grease trap using the same calculations as a single sink. Add together 100% of the largest flow rate, 50% of the second largest, and 25% of all others. The result is the recommended flow rate (in GPM) of the grease trap.
How do you calculate the GPM of a grease interceptor?
To size a Gravity Grease Interceptor with the flow determined in GPM you simply multiply the flow number by a detention time, 30 minutes (the time period normally excepted for the grease to separate by buoyancy). Again with our 20 GPM example, the size would be 20X30= 600. A 600 Gallon size interceptor would be used.
How do you size a grease trap?
L x W x D to give you X as the capacity of the sink then X/231 to give you Y as the flow rate in gallons per minute (GPM). Then Y multiplied by 0.75 to give you the size of the grease trap you will need for your commercial kitchen.Oct 18, 2019
Are grease traps required by code?
required. A grease trap or grease interceptor shall be required to receive the drainage from fixtures and equip- ment with grease-laden waste located in food preparation areas such as restaurants, hotel kitchens, hospitals, school kitchens, bars, factory kitchens, cafeterias or clubs. 1003.3. 2 Food waste grinders.
Why grease trap is required?
The purpose of a grease trap is to collect and therefore reduce the amount of fats, oils and greases (FOG's) that enter the main sewers. Grease entering the main sewer system will over time create blockages, foul odours and pest infestation.
Where should grease traps be located?
Your grease trap is either under your sink in a metal box, in your kitchen floor under a metal sheet, or outside your restaurant under 1, 2, or 3 man-hole covers. This device is designed to catch grease and food particles that go down the the floor drains or sink drains in your commercial kitchen.Jul 25, 2017
How big of a grease trap do I need for my restaurant?
The overall size of the trap is determined by the number of gallons of water flowing down your drains, which is your rate of incoming flow. You'll also want to make sure your grease trap's rated capacity is twice your flow rate. For instance, the rated capacity of a 20 gallon per minute (GPM) grease trap is 40 pounds.Jul 24, 2017
Can a grease trap be too big?
If your grease trap is too large, then you'll spend more money than you need to, get longer detention rates and get into the bad habit of not regularly cleaning it (because you've got extra space, why clean it more often?).Sep 27, 2010