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Commercial Grease Trap Interceptors
More information on Grease Trap Interceptors
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.
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/grease.pdf. 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. |
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