The inlet compartment shall be 23 of the total capacity of the interceptor and in all cases shall be longer than the maximum inside width of the interceptor. Calculate the capacity of the sink in cubic inches by multiplying length by width by depth. Grease traps standard sizes the drainnet grease interceptor is injection molded in engineered copolymer thermoplastics which lowers your operating cost and results in guaranteed longer life. Grease traps vary in size, with smaller variations designed to connect individual sinks and larger ones installed to. The international codes icodes are the widely accepted, comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe, sustainable, affordable and resilient structures. Gt minimum grease trap rating in gallons per minute, cs capacity in gallons of fixtures or sink to be discharged to the grease trap. Discharge capacity is high and continuous, ensuring maximum heat transfer. For low pressure steam heating systems, manufacturers produce steam traps with connection sizes that relate directly to capacity, orifice size. Additional sizing methods can be found in the appendix of astm c16 standard specification for precast concrete grease interceptor tanks. Council will issue formal sizing requirements after a written trade waste application form has been. Sizing mop sink sizing guide size lps usgpm 2 84 22 3 142 37. More expensive than hydromechanical interceptors and grds.
Gs gallons of waste per seat use 25 gallons for restaurants with china dishes andor automatic dishwasher. Each dishwasher will require a seperate grease trap. Maximum flow rate calculated based on each of the sink compartment dimensions and the number of additional fixtures i. A large number of steam users improperly select trap size based on the size of existing piping.
Sizing according to formulas found in section d below. Grease traps sizing information rockford separators. The retention time calculations are derived from the 2009 uniform plumbing code upc fixture unit values in table 73 and gravity grease interceptor sizing in table 103. Goslyn interceptor models we will put goslyn up against any grease trap or interceptor models on the market for ease of use, grease recovery, durability, and reliability. Grease interceptor sizing using upc city of milpitas. Convert grease trap flow gpm into dfu the building code forum. Grease trap sizing is based on a 30minute retention time for light fog producers and a 1hour retention time for heavy fog producers as defined by the fog loading criteria. Louisiana state plumbing code grease trap sizing chart 1 retail establishments expected to serve more meals than estimated by usable sq ft shall install the larger size grease trap. Grease interceptor maintenance practices gravity grease interceptor phoenix city code section 2815 states.
Grease trap size requirements for outdoor traps typically range from a minimum of 1,000 gallons to no more than 2,000 gallons for a single trap, though a series of grease traps can be used if more than 2,000 gallons is necessary. For interceptor sizing by fixture capacity see the example below. Gravity grease interceptor sizing propropp777eeeeeeee dfus interceptor sizing gallons 8 500 21 750 minimum required gravity 35 1,000 grease interceptor size. Associated with this incoming flow rate is the capacity of the trap. The grease trap recovery device calculations are based on the worst case scenario where the 3compartment sinks are full of wastewater and all draining at the same time. Grease interceptor sizing using upc draftfinal june 6, 2017 w. Interceptor drain means a subsurface drainage system constructed only on the upslope sides of a soil absorption system for the purpose of diverting subsurface water around the soil absorption system site. This scenario must be taken into account but seldom occurs. Ongoing operation cost and risk of operating out of compliance.
The discharge pipe from the trap seal primer valve shall connect to the trap above the trap seal on the inlet side of the trap. The endura grease interceptor was designed and built to last and comes with a 10year warranty valid only when the warranty card is filled out and returned to the manufacturer. An integral air vent is fitted as standard and a steam lock release is an option. Option 1 is based on the size of drain line discharging to the interceptor option 2 is based on gallon capacity of fixtures discharging to the interceptor. In order to select the appropriate grease trap for your application, you only need to know the size of the sink for which the grease trap will serve. Where installed, interceptors such as grease, oil or sand shall be maintained by the owner, at his expense, in continuously efficient operation at all times. A soft elastomeric gasket is attached to the body of the interceptor to prevent odor from escaping. Under certain circumstances, a smaller grease trap may be approved. The size of the interceptor shall be determined by the following formula.
Grease interceptor sizing methods grease interceptors are passive devices required by municipalities to stop fat, oil, and grease fog from entering the citys sanitary sewer system. This sizing tool is to provide a products recommendation based on two factors. Sizing grease interceptors grease interceptors are designed and sized based on anticipated flow rates and organic load for maximum efficiency. All are equipped with a onepiece cover secured with machine screws. Work efficiently on both light and heavy condensate loads. Interceptor size based on 30 minute retention time, rounded up to next nominal size 5 2 19. For up to 50, you need 25 pounds of grease trap sizing. Page 52 z1180 solids interceptor operation and maintenance instructions sizing there are no sizing requirements for this interceptor except to specify. The larger the interceptor the higher the flow rate it will handle efficiently with a greater quantity of grease retained. Water resource management grease trap size calculation data sheet. It is recommended that you always check with your plumber and local grease trap company for. All others must utilize grease interceptors unless approved by city staff. Grease interceptor maintenance practices gravity grease. A potable watersupplied trap seal primer valve shall supply water to the trap.
Armstrong inverted bucket steam traps open and close based on the difference in density between condensate and steamthe inverted bucket principle. Grease traps have been in use since victorian times, with the first patent for a modern day grease trap issued to nathaniel whiting in the late 1800s. Waste discharged from fixtures and equipment in establishments which may contain grease or other objectionable materials. How to size a grease trap by type of kitchen method the below data table will automatically calculate your required grease trap size, this is given as a nominal size ns number, you will then be able to browse the ns category of appropriate grease management solutions specified from the information provided.
In many cases this may mean that a larger grease trap may be required than the one specified by the sizing criteria. Steam trap sizing and selection is designed to be used in conjunction with handbook n101 and this catalog. For 20 to 30 gallons, you need to have a 20 pound grease trap. Where sizing formulas result in determination of a grease trap less than 750 gallons in capacity, this minimum size is recommended for all restaurant applications. Grease interceptor sizing calculator grease trap sizing. Sizing of grease interceptors shall be based on the equations of table 1003. Round up to next size available grease interceptor size e. Any person who owns or operates a grease trap, interceptor or separator may submit to sjra a request in writing for an extension to the ninety 90 day pumping frequency. People helping people build a safer world methods of. Grease trap sizing how to find the proper dimensions. This is a commonly manufactured grease interceptor size.
In a restaurant or commercial kitchen, a change to the type of cuisine served, an increase in seating capacity, or a change in the cooking appliances could all have an impact on grease interceptor sizing. Grease traps are sized according to the rate of incoming flow, in gallons per minute gpm. How to calculate the size of grease trap for my restaurant. To determine the cubic holding capacity of the sink, multiply the length by the width by the depth in inches. Interceptor sizing using maximum gravity flow rates pipe diameter slopeft. For underthecounter grease traps, the capacity should be based on the number of fixtures discharging wastewater. Sizing considerations a grease interceptor conforming to standard pdig101 is designed and certified to operate efficiently at its rated capacity. Grease interceptor sizing guide timaru district council. The international code council icc is a nonprofit organization dedicated to developing model codes and standards used in the design, build and compliance process. The sizing criteria outlined on this form is a guide only. Wastewater flow rates of a 3compartment sink is the most important aspect of a grease trap sizing formula.
Dishwashers can be connected to a grease trap only if allowed by local code. Cr steel, with oven cured, acid resistant baked gray epoxy coating, inside and out. A trap shall not be larger than the drainage pipe into which the trap discharges. Minimum grease interceptor size shall be 750 gallons. City of columbia wastewater treatment plant grease trap sizing guide examples include ice cream shops, candy shops, deli in grocery or convenience store without cooking facilities, bagel shops, etc. Select the appropriately sized gravity grease interceptor based on the total drainage fixture unit value determined in step 1. A grease trap is designed to prevent greasy substances from entering plumbing systems, septic tanks, and waste water treatment facilities where they are difficult to process and may create a number of environmental problems. I am sure you can think of several types of faucets like, kitchen, bath room sink and tub to name a few. If your dish machine has a capacity of 10 to 15 gallons, then you need to have at least a 15 pound grease trap. Ball float steam traps are the best choice for draining plant with automatic temperature control. The retention time calculations are derived from the 2009 uniform plumbing code upc fixture unit values in table 73 and gravity grease interceptor sizing in. The chart covers the type of steam traps and the major advantages that armstrong feels are superior for each 4. City of columbia wastewater treatment plant grease trap.
Grease trap sizing chart 1 retail establishments expected to serve more meals than estimated by usable sq ft shall install the larger size grease trap. Sizing an interior grease interceptor by randy lorge. The seamless, leakproof construction ensures that the grease trap will last, even under the most extreme applications. Grease trap is corrosionresistant coated fabricated steel with nohub connections, flow diffusing baffle, integral trap, and vented inlet flow control device. We offer a wide selection of zurn and canplas grease traps and solids interceptors, with the zurn gt2700 series of grease traps being the most popular.
Number of meals waste flow retention storage interceptor size. Both are based on ensuring the wastewater has a minimum retention time of. Grease interceptor sizing august 26, 2015 by food grease trappers grease interceptors take in the flow of water from the parts of your restaurant that produces grease, and filters it out, before the waste water passes into the citys drains. For floor drains and floor sinks take the volume of water produced by the number of hose bibs i. Grease interceptor sizing a correctly sized grease interceptor reduces maintenance costs for restaurants and prevents the chance of a messy and costly overflow. Every business or establishment that produces and disposes of fat, oil or grease fogs, such as restaurants, food processing establishments, hospitals, and day care and senior centers, must have a grease interceptor system to prevent the discharge of waste grease into the citys sewer systems. Grease trap sizing guide a grease trap is designed to prevent greasy substances from entering plumbing systems, septic tanks, and waste water treatment facilities where they are difficult to process and may create a number of environmental problems. Sewer use and drainage permits denver development services. Our team at grease trap sales know how to estimate the size needed for each job. When it comes to sizing grease interceptors, many plumbing codes focus on either flow rate or liquid volume. Each interceptor shall be engineered to withstand the load, such as from vehicular traffic, to be placed on the interceptor. The minimum tank volume of grease interceptors shall be 750 gallons 2839 l, and the maximum volume of an individual grease interceptor. The minimum capacity of a grease interceptor as determined in subd.
However, under no circumstances should exterior grease traps less than 500 gallons be utilized. West virginia department of health and human resources. Alternatively, it can be determined using the two methods as set. The size of a grease trap is generally based on a maximum flow rate measured in litres per hour. Actual sizing should be per chapter 10 of the florida building code 2004 plumbing, current edition. These materials cause blockages in the system, which cause backups and overflows. Title 410 indiana state department of health proposed rule. Float and thermostatic steam traps us spirax sarco. Appendix h of the uniform plumbing code, grease interceptor sizing worksheet. Connection size mechanical joint only 2 3 contractor shall install endura 25xt grease interceptor, part number. Remove the flow control tee from inside the interceptor. An auto fry is defined as an enclosed, ventless, selfcontained individualserving deep fryer. The good news is you do not have to make sizing decisions on your own.
Congratulations on your purchase of the endura grease interceptor. Basic principles for sizing grease interceptors grease interceptor is an overall term. Given the lack of guidance on tank sizing, the purpose of this document is to. Appendixo entitled, grease traps, is an excerpt originating from section d pretreatment found within. Small relative to the size flow capable of being treated and can be located closer to the fog source or as large as a small treatment plant.
Sizing an interior grease interceptor wisconline oer. Grease traps and interceptors like the watts wd50 are often used with cooking or prep sinks, pot sinks, and commercial dishwashers in various types of commercial food. The pretreatment program shall apply these grease trap sizing criteria in combination with its best professional judgment as a part of the approval process. Maximum full pipe flow nominal interceptor size 1 min. Passive grease traps store and accumulate the fat, oil, grease, fog and food solids until the grease trap is pumped out.
The parameters for sizing a grease interceptor are hydraulic loading and grease storage capacity, for one or more fixtures. For example, assume you are looking for information concerning the proper trap to use on a gravity drained jacketed kettle. Grease trap sizing chart how to determine the flow rate of your sink. Wentworth 70 pound grease trap interceptor 35 gpm gallons. Watersupplied trap seal primer valves shall conform to asse 1018. The actual pressure drop in psi kpa will depend on the refrigerant. Sizing for commercial sinks batch dumping process the separator should hold one half of the liquid holding capacity of the sink that it services. Sjra may grant an extension for required cleaning frequency on a casebycase basis. Learners follow steps to size an interior grease interceptor in a plumbing system that is collecting deleterious materials from a commercial kitchen sink. Fixture trap size shall be sufficient to drain the fixture rapidly and not less than the size indicated in table 709. However, trap size should closely match the size of.
The fog ordinance adopted by the orange county sanitation district requires grease interceptor sizing to conform to the uniform plumbing code. Charts, formulas, and calculations are used to determine grease trap sizing and capacities. Wentworth 70 pound grease trap interceptor 35 gpm gallons per. Gt2700 grease interceptor recommended for removing and retaining grease from wastewater in kitchen and restaurant areas where food is prepared. Divide this figure by 231 to obtain the liquid holding capacity in gallons. Use 10 gallons for restaurants with paper or baskets and no dishwasher hr number of hours restaurant is open. If you have multiple compartments or sinks, add the capacity of sinks together to find total cubic inches. Guidelines for precast concrete grease interceptors. When first installed there is almost all water in the grease trap, as it operates the amount of grease increases and the amount of water in it decreases. There are two methods that we use to determine the appropriate size of a grease trap. A grease interceptor is not required where only one auto. Gravity grease interceptor sizing dfu volume gallons 8 500 21 750 35 1,000 90 1,250. Grease trap means a tank designed to intercept, congeal, and retain or remove fats, oils, and grease fogs from sewage.