For use in large restaurant and institutional kitchens and all types of food handling and processing areas where waste water contains large amounts of grease, fats and oils. Adequate space and head room for removal of cover must be available for manual cleaning.

What are Grease Traps?
Grease trap interceptors are passive devices that stop fats, oils, and grease from reaching a municipalities sanitary sewer system. Grease traps are often required by code, and must be installed by restaurants, as well as any other commercial cooking facilities. Governmental codes are different from jurisdiction to jurisdiction on the type and size of grease trap needed. Please contact them for specifics before ordering a grease trap interceptor from Commercial Plumbing Supply.

What is FOG?
“FOG” is an acronym that stands for fats, oils, and grease. This terminology is used to refer the type of matter that enters a grease trap. Today’s interceptor has to handle the increased use of vegetable oils and fat substitutes, as well various configurations of fats.

What does no-hub mean?
These fittings are not threaded and require a standard no hub adapter.

How do grease traps work?
Grease traps work by gravity. They use coalescence as a means of separation. Grease is lighter than water. The grease trap uses a separation chamber that allows the fats and oils to rise to the surface. The remaining water exits the trap at the low end away from the inlet. The Grease trap creates separation efficiency by using specially engineered internal baffling as well as a vented flow control device.

What does PDI approved mean?
“PDI approved” means that the grease trap has been approved by the Plumbing and Drain Institute. The Plumbing and Drain Institute was created out of the need for standards in the industry in the 1940’s.Various interested parties such as the Army Corps of Engineers, the Quartermaster General, the Surgeon General, and the Research Committee of the Plumbing and Drainage Manufacturers Association created a standard in 1949 known as PDI-G101. Since this date this standard has been widely recognized. A grease trap that has been certified as having met the PDI-G101 standard can be installed with confidence that it will meet the rated flow rates and capacity for retained FOG.

Installation tips - We strongly recommend professional installation, and only provide these tips as general information.

• As basic as it seems, a grease interceptor must not be installed backwards. The grease trap will no work if installed this way
• A grease trap must be installed a close as possible to the FOG laden water. Every foot of piping between the FOG source and the grease trap is a potential maintenance problem. A grease trap works most efficiently when the effluent is relatively hot
• It must be installed so maintenance can be easily performed. The cover must be removed periodically to remove the FOG, so the grease trap must be installed to provide this access. Enough clearance should be available to be able to remove and service the internal baffling.
• The Flow Control Fitting furnished with a PDI Certified Interceptor must be installed in the waste line ahead of the interceptor. It should be located beyond the last connection from the fixture and as close a possible to the underside of the lowest fixture to minimize the effects of head pressure.
• All installation recommendations are subject to the approval of the local plumbing code authority.

What is the method for determining rated capacity?
The method for determining a grease trap interceptor’s rated capacity is fairly simple if it is PDI Certified. A PDI Certified interceptor has a rated retention capacity equal to twice its flow rate expressed in pounds. This means that our 50GPM Grease Trap is rated to retain at least 100 lbs. of grease.

How often should the grease trap be cleaned?
If a user measures how much grease has been trapped over a period of time, a cleaning schedule can be developed. Grease weighs about 7 pounds per gallon. If a 50 GPM interceptor accumulates about 7 gallons of grease per week, then it should be cleaned weekly. Cleaning a grease trap involves the removal of grease from the top of the separation chamber as well as any solids which have accumulated along the bottom. Do not use hot water, acids, caustics, solvents, or emulsifying agents when cleaning grease traps and interceptors. If the grease trap interceptor is cleaned frequently or daily, it usually requires only 15 minutes, and there will be limited or no objectionable odors. The FOG must be disposed of in accordance with applicable solid and special waste disposal regulations.

Where can I find more information?
Much if the information provided above can be found in the PDI Guide to Grease Interceptors at http://www.pdionline.org.

As per their advice: REMEMBER: Proper maintenance of even the poorest interceptor will provide better results than the lack of maintenance on the best interceptor