Table of Contents
How do you size a grease trap 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 big does a grease trap have to be?
If you choose a two-minute drainage period, for a 2” pipe you would need a grease trap rated for 10 gpm. The UPC code also states that the total capacity in gallons of fixtures discharging into this particular grease trap (10 gpm) must not exceed two and one-half times the certified flow rate (gpm) of the grease trap.
How do you size a grease arrestor?
The recommended grease arrestor size is calculated as follows: 0.5L/sec x 3600 sec/hour = 1800L/hour. Therefore the recommended size is 2000L (From Table 2).
Do I need a grease interceptor?
A grease interceptor removes fats, oils, and grease that coat city sewer lines and cause sewer overflows. If an overflow occurs, you may be responsible for clean-up costs and property damage.
What is hydromechanical grease interceptor?
Hydromechanical grease interceptors (HGIs) (formerly named grease traps) treat kitchen wastewater from food service establishments (FSEs) using gravity separation aided by vented flow control. They are typically installed indoors and connected to one to four sinks in the kitchen and can be either above floor or below.
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?). There are three methods of sizing a grease trap.
What is the minimum outlet size of a commercial grease arrestor?
1500L
Grease arrester For example, a cooking process involving a wok burner may generate high volumes of waste water and the minimum size of the grease arrestor required would be 1500L. Fast food outlets such as McDonalds, Red Rooster and KFC require grease arrestors with a minimum capacity of 1500L.
What is the maximum number of fixtures allowed to be connected into any grease trap?
four
Not to exceed four (4) separate fixtures shall be connected to, or discharged into, any one grease trap or interceptor.
Can a commercial dishwasher drain into a grease trap?
Unless specifically required or permitted by the Authority Having Jurisdiction, no food waste disposal unit or dishwasher shall be connected to or discharge into any grease interceptor. Commercial food waste disposers shall be permitted to discharge directly into the building’s drainage system.
Should a dishwasher be connected to a grease interceptor?
When a grease interceptor is to be used, the dishwasher shall be connected to the grease interceptor. h. All floor drains in dishwashing area and kitchen are not required to be connected to a grease trap, but shall be connected to a grease interceptor if device is installed.
Can a dishwasher drain to a grease interceptor?
3 – Unless specifically required or permitted by the Authority Having Jurisdiction, no food waste disposal unit or dishwasher shall be connected to or discharge into any hydromechanical grease interceptor.
What kitchen equipment requires a grease trap?
Every dishwashing sink, dishwashing machine, and every fixed receptacle or plumbing fixture designed, intended, or used for the purpose of washing dishes or cooking utensils in a restaurant, cafe, cafeteria, lunchroom, hotel kitchen, hospital kitchen, sanitarium kitchen, or similar establishment shall be connected to.
How do you size a grease interceptor?
When it comes to sizing grease interceptors, many plumbing codes focus on either flow rate or liquid volume. Schier considers both flow rate and grease production to determine the capacity of the interceptor and its recommended pump out frequency.
How are commercial grease traps sized?
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. This rated capacity, in pounds, is listed at twice the flow rate. For example, a 10 GPM trap has a rated capacity of 20 pounds. *All calculations, formulas,
What is grease production sizing and how does it work?
First introduced by Schier in 2012, Grease Production Sizing calculates how much grease a restaurant is likely to produce to ensure the grease interceptor has enough capacity to allow for a realistic and affordable pumpout frequency.
How do you calculate GPM For a grease trap?
GPM x 0.75 = GPM* x 2 = Flow Rate Capacity (lbs.) * The resulting GPM is the required flow rate to drain the sink in one minute. You would then choose a grease trap with a GPM flow rate close to this number. If Draining Multiple Sinks Into One Grease Trap